Co-reporter:Weibin Bai, Xianhuo Shang, Chunxiang Wu, Xiaotao Liu, Junfeng Zheng, Jinhuo Lin
Synthetic Metals 2017 Volume 223() pp:58-66
Publication Date(Web):January 2017
DOI:10.1016/j.synthmet.2016.12.003
•Well-defined conjugated polymeric nanowires can be formed from the diluted solution in the solvent vapor.•Solvents and the concentrations can affect the morphologies and the optical properties of the films.•The optical properties are influenced by the conformations and aggregations of the polymer though the solvent-solute interaction and the solute-solute interaction from the solutions.Polymer morphologies in thin films strongly depend on the state of the solution and the film processing conditions, which lead to significant impacts on the optoelectronic properties. In this work, the morphologies of poly(p-phenylene) films are investigated by concentration-dependent fluorescence spectroscopy and scanning electron microscopy combined with the contact angle tests. We find that the well-defined nanowires of the hairy-rod conjugated polymer can be self-assembled in different good solvent vapor atmospheres from the dilute solutions. The driving force of aggregation would be the side-chain entanglement and the intermolecular π–π interactions, which are sensitive to concentration. Moreover, the optical properties are strongly affected by the polymer concentration, which is the main factor to form different conformations and aggregations of polymers. These results are valuable for the intrinsic properties of poly(p-phenylene) and the potential application in optoelectronic devices.
Co-reporter:Donghui Wang;Meng Zhang;Zhen Luo;Weibin Bai;Yanlian Xu
Polymer Bulletin 2016 Volume 73( Issue 6) pp:1639-1647
Publication Date(Web):2016 June
DOI:10.1007/s00289-015-1568-0
In this work, polyurushiol (PUS) was synthesized through a Friedel–Crafts reaction using brönsted acid as a catalyst. The product was then utilized in the fabrication of honeycomb porous films by breath figures (BFs). The PUS porous films were subsequently exposed to a high pressure mercury lamp for several seconds (5–30 s). An AgNO3 solution was then dripped onto the surface of films to form PUS/Ag composite porous films through the in situ photoreduction method, avoiding the use of harmful reducing agents. Key preparation factors, including solvent type, UV irradiation time and AgNO3 concentration, were systematically investigated. The composite films were characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Ag particles (approximate size of 50 nm) were formed on the surface of PUS porous films when water was used as a solvent. In addition, increased AgNO3 concentration or UV irradiation time facilitated a change in the conductivity state of PUS/Ag porous films from insulator to semiconductor. The as-prepared PUS/Ag composite porous films provided excellent electronic properties and thus provided significant potential for future application in various fields.
Co-reporter:Yuyi Zheng;Junfeng Zheng;Chunxiang Wu;Xianhuo Shang;Weibin Bai
Polymer Bulletin 2016 Volume 73( Issue 10) pp:2843-2854
Publication Date(Web):2016 October
DOI:10.1007/s00289-016-1626-2
Under nonsolvent vapor atmospheres, poly(1,1′-binaphthol butyl ether) nanospheres can be self-assembled from various good solvent solutions. To obtain the optimized assembling parameters, the factors such as the solvents and the polymer concentrations, on the formation of polymeric nanospheres were investigated. The choice of good solvent and nonsolvent is an important factor. The well-ordered nanospheres with the sizes of hundreds nm can be easily obtained from the preparation combinations such as CH2Cl2/MeOH vapor, CHCl3/MeOH vapor, CHCl3/EtOH vapor, and THF/EtOH vapor. Moreover, the increasing polymer concentration leads to the increasing spherical agglomerations. The static water contact angles of the films with polymeric spheres were measured to be above 130°. With the excitation wavelength of 371 nm, the polymeric nanospheres showed the blue emission with the peak at 480 nm. The nonsolvent vapor method is a facile way to prepare polymeric nanospheres.
Co-reporter:Weibin Bai, Chunxiang Wu, Xianhuo Shang, Xiaotao Liu, Kuizhi Chen, Jinhuo Lin
Reactive and Functional Polymers 2016 101() pp: 75-81
Publication Date(Web):April 2016
DOI:10.1016/j.reactfunctpolym.2016.02.010
Co-reporter:C.M. Huang;M. Zhang;D.H. Wang;W.B. Bai;B.H. Hu;Y.L. Xu;J.H. Lin
Polymer Composites 2015 Volume 36( Issue 10) pp:1884-1890
Publication Date(Web):
DOI:10.1002/pc.23096
Urushiol-titanium chelate polymer (UTP), the reaction product of urushiol with titanium compound, has been used as a heavy anti-corrosive coating in chemical industries in China. UTP could not be made into regular honeycomb-porous film just using breath figures, whereas that could be done with the incorporation of hydroxylated multiwall carbon nanotubes (MWCNT). MWCNT showed significant influences on the formation of highly ordered microporous films. The preparation conditions also affected the honeycomb structure of films and then exhibited different morphologies. The results measured from energy dispersive X-ray spectra showed that the content of oxygen around the hole of UTP/MWCNT microporous film was higher than that on the wall of the hole. Moreover, UTP/MWCNT microporous film had excellent acid, alkali, and organic solvent resistance properties. POLYM. COMPOS., 36:1884–1890, 2015. © 2014 Society of Plastics Engineers
Co-reporter:Yuyi Zheng;Chunxiang Wu;Xianhuo Shang;Lifang Cai;Weibin Bai
Polymer Bulletin 2015 Volume 72( Issue 3) pp:613
Publication Date(Web):2015 March
DOI:10.1007/s00289-015-1316-5
Co-reporter:Yiyu Zheng;Chunxiang Wu;Xianhuo Shang;Lifang Cai;Weibin Bai
Polymer Bulletin 2015 Volume 72( Issue 3) pp:599-611
Publication Date(Web):2015 March
DOI:10.1007/s00289-014-1294-z
Poly(1,1′-binaphthol butyl ether)s have successfully been synthesized by solid-state oxidative polymerization of 1,1′-binaphthol butyl ether with FeCl3 as oxidant for 35 min at 25 °C. On the basis of FT-IR, 1H NMR and computational calculation results, the intermolecular 1, 4-linked coupling is the main way to extend the polymer chain, accompanied by the formation of intramolecular coupling. The increase of FeCl3 ratio can increase more fused aromatic structures in the polymer backbones to increase the conjugation length and coplanarity. The extended large π-conjugated structures not only improve the thermal stability of the polymers, but also control the emission wavelengths ranging from blue emission to green emission in solutions and blue emission to yellow emission in films. The polymeric spherical nanoparticles with sizes of 100 nm can be obtained by the reprecipitation method, and show a yellow-green emission at around 567 nm.
Co-reporter:Weibin Bai, Lifang Cai, Xueqing Xiao, Chunxiang Wu, Jinhuo Lin
European Polymer Journal 2014 Volume 57() pp:58-65
Publication Date(Web):August 2014
DOI:10.1016/j.eurpolymj.2014.05.009
•PNs were synthesized by solid-state oxidative polymerization in high yield.•The insoluble PNs have high char yield.•The soluble PNs can self-assemble to microspheres with nanosheets in MeOH vapor.Polynaphthalenes have successfully been synthesized by solid-state oxidative polymerization of naphthalene with FeCl3 as oxidant for 30 min with a total polymerization yield of 98% at 25 °C. On the basis of FT-IR, 1H NMR, elemental analysis and extended Hückel charge calculation results, the intermolecular 1,4-linked coupling is the main way to extend the polynaphthalene chain, accompanied with the formation of intramolecular coupling. The UV–Vis spectral band at 517 nm also confirmed the formation of large π-conjugated structure. The chloroform-insoluble part of the polynaphthalenes with a high char yield of 85% after heated up to 600 °C in nitrogen. In MeOH vapor atmosphere, the chloroform-soluble part of the polynaphthalenes can self-assemble to form microspheres patterns (average diameter 0.76 μm) by the nonsolvent vapor method. The microspheres with nanosheets were obtained due to the semicrystalline structure of the polynaphthalenes.Graphical abstract
Co-reporter:Weibin Bai, Lifang Cai, Dongxian Zhuo, Yanlian Xu, Hanyu Xue, Qinhui Chen, Jinhuo Lin
Progress in Organic Coatings 2014 Volume 77(Issue 2) pp:431-438
Publication Date(Web):February 2014
DOI:10.1016/j.porgcoat.2013.11.007
•K2CuCl4·2H2O can be used as the mimic laccase to cure the dead lacquer.•Optimal cure conditions are 0.6% K2CuCl4·2H2O, stirring 90 min, 75% relative humidity.•The dead lacquer film has good thermal stability and chemical resistance.Oriental lacquer collected from lacquer trees is widely used as surface coatings for centuries. The lacquer with little activity of laccase is called dead lacquer vividly which cannot be cured automatically. In this study, the cheap copper chloride dihydrate (K2CuCl4·2H2O) was used as a novel catalyst to cure the dead lacquer at room temperature. The redox property of K2CuCl4·2H2O was studied by cyclic voltammetry. The process of oxidative polymerization of urushiol was confirmed by FT-IR, 1H NMR, UV–vis, and electron spin-resonance spectroscopy. At 75% relative humidity, the dead lacquer film with the gloss of 101.0% and hardness of 0.84 (glass value) could be obtained when the K2CuCl4·2H2O content was 0.6 wt%. The results of the thermal properties and the chemical resistance tests showed that the dead lacquer film catalyzed by K2CuCl4·2H2O had better thermal stability and chemical resistance than those of the raw lacquer film catalyzed by laccase.
Co-reporter:Qinhui Chen;Yi Deng;Xinggong Mao;Fengqin Yin
Journal of Applied Polymer Science 2014 Volume 131( Issue 4) pp:
Publication Date(Web):
DOI:10.1002/app.39911
ABSTRACT
Polypropylene-graft-cardanol (CAPP) was prepared by reactive extrusion with polypropylene (PP) and natural renewable cardanol, which improved the inherent defects of PP such as its chemical inertness and hydrophobicity. Moreover, the cardanol grafted onto PP resolved the degradation of PP during reactive extrusion and use. The effects of reactive extrusion on the change of the molecular structure of PP, the change in the free-radical concentration during processing, and the compatibilization of CAPP on the PP/polystyrene (PS) composite materials were examined in this study. The constants of the grafting reaction rate at the beginning of reactive extrusion were also deduced. The results show that cardanol was grafted onto PP, and the p–π conjugate system in cardanol was observed to stabilize free radicals. The grafting reaction rate (Rg) at the initial stage of the grafting reaction process was calculated through the equation Rg = kg[M·][Cardanol], where kg is the constant of the apparent grafting reaction rate and [M·] is the concentration of free radicals in the reaction system. kg first increased with the growth of temperature and then began to decrease when the temperature exceeded the critical temperature of 200°C. The mechanical properties showed almost no change after the samples were aged for 72 h. This was due to CAPP, which changed PP/PS to a ductile material from a brittle one. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39911.
Co-reporter:Haibin Huang;Qinhui Chen;Junhui He;Longhui Zheng
Colloid and Polymer Science 2014 Volume 292( Issue 12) pp:3085-3093
Publication Date(Web):2014 December
DOI:10.1007/s00396-014-3362-1
Janus materials with anisotropic chemical structures and physical properties have attracted increasing attention due to their diversified potential applications. In this paper, titanium dioxide/3-(trimethoxysilyl) propylmethacrylate (TiO2/MPS) was obtained by swelling assisted with extrusion of PS@TiO2. Then, the phenolic resin (PF) was coated on the surface of MPS lobe. Finally, TiO2/C Janus composite particles were obtained by sintering at the atmosphere of nitrogen. The middle objects during reactive process and the final product were systematically characterized. Results showed that the Janus porous particles of TiO2/C were snowman-like structure, in which the average diameter of the carbon lobe was 178 nm and that of TiO2 lobe was 226 nm. When used as photocatalysts for Rhodamine B degradation in aqueous solution under UV irradiation, the resulted Janus product exhibited more efficient photocatalytic activity than TiO2 hollow microspheres.
Co-reporter:Longhui Zheng, Qinhui Chen, Baoling Chen, Jinhuo Lin
Materials Letters 2014 120() pp: 271-274
Publication Date(Web):
DOI:10.1016/j.matlet.2014.01.102
Co-reporter:Weibin Bai, Xueqing Xiao, Lifang Cai, Yanlian Xu, Jinhuo Lin
Reactive and Functional Polymers 2014 76() pp: 13-18
Publication Date(Web):March 2014
DOI:10.1016/j.reactfunctpolym.2014.01.005
Co-reporter:Xueqing Xiao;Weibin Bai
Polymer Bulletin 2014 Volume 71( Issue 8) pp:2103-2112
Publication Date(Web):2014 August
DOI:10.1007/s00289-014-1175-5
Self-assembly of π-conjugated polymers upon slow precipitation was comprehensively studied by suffusion of a vapor of non-solvents into polymer solutions. However, it was reported that only copolymers with steric hindrance in their backbone tended to form ordered spheres, while homopolymers having a single monomer component were hard to form ordered microstructure. This article presented here a strategy for the self-assembly of microspheres of a π-conjugated polymer having a single monomer component, e.g., poly(9,9-dihexylfluorene) (PDHF). The microspheres of PDHF were fabricated in the methanol vapor by the non-solvent vapor method. To obtain the optimized assembling parameters, the effect of self-assembling conditions including polymer concentration, the injection volume, the types of the non-solvent vapor, and solvent on the microstructural formation of PDHF were well investigated. The experimental results indicated that the increase of polymer concentration and injection volume led to the increase of partial aggregate of the spheres. Besides, the relatively uniform microsphere could be easily obtained with the concentration ranged from 2.5 to 5.0 mg/mL, and the injection volume of 5.0 μL in the methanol vapor. Furthermore, the polar solvent was advantageous to form well-ordered microspheres in the methanol vapor.
Co-reporter:Qinhui Chen, Longhui Zheng, Baoling Chen, Jinhuo Lin
European Polymer Journal 2013 Volume 49(Issue 9) pp:2610-2616
Publication Date(Web):September 2013
DOI:10.1016/j.eurpolymj.2013.06.003
•Janus of TiO2-poly(VBC–DVB) is synthesized by emulsion swelling assisted protrusion.•The size of the lobe of poly(VBC–DVB) is tunable.•Janus composite particles of TiO2–Ag are obtained by in situ reaction.•The Ag particles can be tailored by changing Tollens’ reactive conditions.Janus particles possess heterogeneous surface chemistries which can potentially enhance their interfacial activity and be exploited as useful catalysis agent. It is challenging to control the geometry of the Janus particles and to produce Janus particles in large quantities. In this report, we use a general approach of emulsion swelling assisted protrusion to synthesize the Janus composite particles of titania – poly (vinylbenzyl chloride-divinylbenzene) (TiO2-poly (VBC–DVB)). The size of the lobe of poly (VBC–DVB) is tunable. After a series of reactions, including Kornblum oxidation reaction and Tollens’ reaction, the target product of TiO2–Ag Janus composite particles is obtained.Graphical abstract
Co-reporter:Qinhui Chen;Xinggong Mao;Hanyu Xue;Yi Deng
Journal of Applied Polymer Science 2013 Volume 130( Issue 4) pp:2377-2382
Publication Date(Web):
DOI:10.1002/app.39347
ABSTRACT
In this study, lauryl methacrylate grafted onto bamboo fibers (BF-g-LM) was prepared to improve the interfacial compatibility between hydrophilic bamboo fibers (BFs) and hydrophobic plastic. The lauryl methacrylate (LM) was initiated by benzoxyl peroxide (BPO) and grafted onto BFs via a free-radical chain-transfer reaction. LM was grafted onto BFs with ether bonds, and differential scanning calorimetry indicated that the ether pyrolysis of BF-g-LM occurred at 280°C. The optimum preparation conditions were obtained as follows: 0.30 g of pretreated bamboo flour was immersed in 0.225 mol/L LM. The reaction was then initiated by 0.025 mol/L BPO, and this reaction was sustained for 4 h at 80°C. BF-g-LM served as coupling agent between the BFs and the polypropylene (PP) matrix, as shown by scanning electron microscopy analysis. The elongation at break of the BF/PP composites with BF-g-LM increased to two times compared to that of the BF/PP composites without BF-g-LM. The impact strength and maximum deflection also increased to 75 and 580%, respectively. In conclusion, BF-g-LM is a promising coupling agent that can be used in BF-reinforced thermoplastic composites. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2377–2382, 2013
Co-reporter:Weibin Bai, Xueqing Xiao, Qinhui Chen, Yanlian Xu, Sining Zheng, Jinhuo Lin
Progress in Organic Coatings 2012 Volume 75(Issue 3) pp:184-189
Publication Date(Web):November 2012
DOI:10.1016/j.porgcoat.2012.04.016
By grinding cardanol and anhydrous FeCl3 powder using a glass pestle in a mortar at ambient and solvent-free condition, a novel cross-linked polymer from cardanol, a renewable resource, was synthesized in high yield up to 80% in 5 min. The products were characterized through UV–vis, FT-IR, and 1H NMR; and the solvent-free grinding polymerization was consisted of Friedel–Crafts reaction, etherification reaction, and oxidative coupling reaction. The effect of these different techniques on spectral, thermal, optical, electrical, and morphological properties of polycardanol were investigated.Graphical abstractHighlights► Polycardanol can be synthesized by grinding cardanol and FeCl3 in high yield. ► The solvent-free grinding polymerization is consisted of three reactions. ► The polycardanol has high thermostability and shows blue emission (406 nm).
Co-reporter:Yanlian Xu, Weibin Bai, Zhen Luo, Yao Jin, Bichen Peng, Lixia Feng, Binghuan Hu, Jinhuo Lin
Applied Surface Science 2012 Volume 258(Issue 12) pp:5141-5145
Publication Date(Web):1 April 2012
DOI:10.1016/j.apsusc.2012.01.155
Abstract
Raw lacquer, a renewable and eco-friendly biopolymer material with excellent physico-mechanical properties, has been principally used to coat objects of high artistic and pleasing beauty for centuries. In previous reports, we studied microporous urushiol-based polymer (UBP) films by the water-assisted assembly method. The effect of drying time on the formation of breath figures with honeycomb patterns in the microporous films of urushiol–formaldehyde diethylenetriamine polymer (UFDP) was investigated in this paper. The pattern structure was studied with optical microscopy (OM) and scanning electron microscopy (SEM). The drying time, which is influenced by the reflux time, plays a decisive role in the morphology, such as pore size and distribution periodicity, of the microporous UFDP films.
Co-reporter:Hanyu Xue;Qinhui Chen
Journal of Applied Polymer Science 2012 Volume 125( Issue 1) pp:439-447
Publication Date(Web):
DOI:10.1002/app.35645
Abstract
To improve the interfacial adhesion of bamboo powder/plastic composites by using natural coupling agents, bamboo fibers (BFs) coated with urushiol-ferric (BCFeU) were obtained via in situ polymerization and BCFeU/ polypropylene (PP) composites were prepared. Direct correlations were found between coating ratio of BCFeU and activation time, concentration of urushiol, reaction time and concentration of ferric chloride. Five methods consisting of polarizing microscope, scanning electron microscope, X-ray photoelectron spectroscope, thermo gravimetric analysis, and differential scanning calorimetry were used to characterize the BCFeU. The results show that BCFeU was obtained successfully. Urushiol-ferric compounds were coated on the BFs by hydrogen bonding. Tensile test results and scanning electron microscope analysis of tensile fracture surfaces showed that urushiol-ferric acted as a coupling agent in BCFeU/PP composite. This results in 56% increase in elongation at break and 46% increase in maximum deflection of BCFeU/PP composite (compared with that of BF/PP composite) while there was no evident of variation in tensile strength and bending strength. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
Co-reporter:Weibin Bai;Kuizhi Chen;Yanlian Xu;Jingwei Wang;Zhen Luo
Polymer Bulletin 2012 Volume 69( Issue 2) pp:125-135
Publication Date(Web):2012 July
DOI:10.1007/s00289-011-0692-8
Soluble conjugated aromatic poly(1,3-dialkoxybenzene)s were obtained in high yield up to 80% in 30 min by grinding 1,3-dialkoxybenzene with anhydrous FeCl3 powder in a mortar at ambient and solvent-free condition. The polymers were characterized by FT-IR, 1H-NMR, 13C-NMR, and gel permeation chromatography. The structure of the aromatic rings linkage at meta-position was confirmed. Thermogravimetric analysis, UV–Vis, fluorescence spectroscopy, and four-probe a.c. technique were used to probe the thermal, optical, and electrical properties of the polymers. The polymers displayed high thermostability with the decomposition temperatures at about 382–388 °C. The optical energy gap (Eg) of the polymers was 4.23 eV and electrical conductivity at room temperature was 10−6 S cm−1. The fluorescence curve of the polymers displayed the maximum at 344 nm in CH2Cl2 solution. The morphology of the polymers was determined by X-ray diffraction and scanning electron microscope technique.
Co-reporter:Yanlian Xu;Qinhui Chen;Weibin Bai
Polymer Bulletin 2012 Volume 68( Issue 4) pp:983-992
Publication Date(Web):2012 March
DOI:10.1007/s00289-011-0593-x
Raw lacquer (RLA) has been widely used indoors for centuries in Asia. But its weak UV-resistant property limited its outdoor application. In this article, the UV-resistant property of lacquer film was significantly improved by solution intercalation method. The intercalated nanocomposites were obtained from RLA, multihydroxyl polyacrylate resin (MPA), and organophilic montmorillonite (OMMT). The structure and morphology of the RLA/MPA/OMMT nanocomposites were confirmed by X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The variation of the film gloss and impact strength with different UV exposure time was also investigated. Owing to the dispersion of nanometer-sized OMMT in polymer matrix, the RLA/MPA/OMMT nanocomposites exhibited improved UV-resistant property. When the OMMT content is 3.0 wt%, the best physical–mechanical properties can be obtained. These results indicated that the solution intercalation with nanoparticles was an efficient and convenient method to improve the properties of raw lacquer.
Co-reporter:Jianrong Xia, Jinhuo Lin, Yanlian Xu, and Qinhui Chen
ACS Applied Materials & Interfaces 2011 Volume 3(Issue 2) pp:482
Publication Date(Web):December 29, 2010
DOI:10.1021/am1010578
To dry Chinese lacquer rapidly for the protection and restoration of archeological findings coated by lacquer or excavated lacquer wares and the development of new application of this lacquer, we carried out UV curing technology to improve its curing rate using a high-pressure mercury lamp as a UV source in the absence of any additional photoinitiator. The effects of mainly specific components in Chinese lacquer sap and the role of each reactive group of urushiol, namely hydroxyl groups, hydrogen on the phenyl ring, and olefins in the side chain, in the course of UV exposure were well-investigated. The UV-cured Chinese lacquer films were also characterized by FT−IR, 1H NMR, SEM, TGA, and Py−GC/MS. The results showed that urushiol was the main component to form Chinese lacquer films, and decomposed to generate the urushiol semiquinone radicals, which sequentially induced the polymerization of Chinese lacquer by radical polymerization, as well as radical substitution under UV irradiation. In addition, the TG analysis suggested that polysaccharide and glycoproteins were integrated with the UV-cured films by covalent bonding. Furthermore, this method could be suitable to fast cure other phenol bearing long aliphatic unsaturated chain, such as CNSL.Keywords (keywords): Chinese lacquer; coatings; cross-linking; photopolymerization; pyrolysis; radical polymerization; semiquinone radicals; UV irradiation
Co-reporter:Yanlian Xu, Zhaoqiao Tong, Jianrong Xia, Binghuan Hu, Jinhuo Lin
Progress in Organic Coatings 2011 Volume 72(Issue 3) pp:586-591
Publication Date(Web):November 2011
DOI:10.1016/j.porgcoat.2011.06.018
Chinese lacquer, a natural polymeric material, and its processing products have been principally used to coat objects of high artistic and pleasing beauty with excellent physico-mechanical properties for centuries. The use of modified urushiol as functional materials, however, is rarely reported in the previous literature. To develop their potentially functional applications, the microporous films of urushiol-formaldehyde polymer (UFP) were fabricated on a solid substrate by using water-assisted assembly method in this paper. The resulted films were characterized by SEM and contact angle measurements. Several influencing factors were considered on the formation of the microporous films with different morphologies, including the concentration of the polymer solution, the relative humidity in the atmosphere, the speed of the moist airflow and the spread volume of the polymer solution. It was found that the pore size of microporous films increased with the increase of relative humidity, the speed of the moisture airflow, and the amount of the solution. Additionally, the ordered pores of UFP films could be formed even under the high concentrations. Furthermore, the as-prepared UFP microporous films had hydrophobic property and good acid–alkali resistance.Highlights► UFP microporous films have been fabricated by water-assisted assembly method. ► The ordered pores of UFP films could be formed even under high concentrations. ► The UFP microporous films had hydrophobic property and good acid–alkali resistance. ► The films are expected to play an important role in the future applications.
Co-reporter:Yongzhi Liu, Jianrong Xia, Jinhuo Lin
Progress in Organic Coatings 2011 Volume 71(Issue 1) pp:117-120
Publication Date(Web):May 2011
DOI:10.1016/j.porgcoat.2010.11.019
Co-reporter:Qinhui Chen, Qingqin Li, Jinhuo Lin
Materials Chemistry and Physics 2011 Volume 128(Issue 3) pp:377-382
Publication Date(Web):15 August 2011
DOI:10.1016/j.matchemphys.2011.03.009
Janus particles possess promising performances. It is challenging to develop new methods to control composition and microstructure of the particles. In this report, we describe a general template synthesis of several non-spherical Janus composite particles by the template of dumbbell-like silica/polystyrene (PS) Janus particles. Both PS and silica can be modified to introduce desired functional groups respectively, or induce crystallization of other materials on the particle surface. Especially, by favorable growth of materials within the sulfonated PS gel forming the core–shell structure at the polymer part, several new Janus hollow particles are obtained after removal of the PS core.Highlights► We synthesize Janus composite particles by template. ► The part of sulfonated polystyrene can induce a favorable formation of materials. ► Janus hollow particles are obtained after the removal of polystyrene core. ► The silica part can also induce a favorable growth of materials by using silanes.
Co-reporter:Jianrong Xia, Yanlian Xu, Jinhuo Lin
Progress in Organic Coatings 2010 Volume 67(Issue 3) pp:365-369
Publication Date(Web):March 2010
DOI:10.1016/j.porgcoat.2009.12.004
There are a large number of lacquer-coated, excavated cultural treasures in China, e.g. Qin Terracotta Army. The lacquer film is formed via the laccase-catalyzed polymerization and a coupling reaction on the long aliphatic unsaturated side chain, which requires a long drying period and specific conditions. The protection and restoration of these archaeological findings and the development of new lacquer wares should find a facile way urgently to dry raw lacquer rapidly. Furthermore, to keep lacquer wares’ excellent brilliance, the surface morphology is of much importance. Urushiol, the basis of lacquer, can be cured under UV irradiation within 2 min in the absence of a photoinitiator, which dramatically shortens the drying time. The wrinkled coating with lusterless surfaces, however, was obtained. In this paper, a facile approach was developed to prepare cured urushiol films with glossy smooth surfaces using a high-pressure mercury lamp as a UV source. The CC bonds in the long aliphatic unsaturated side chain of urushiol were hydrogenated for different times, and the effects of hydrogenation degree of urushiol on surface morphology of the UV cured films were investigated by scanning electron microscopy (SEM). The results showed that when hydrogenated for 3 h or more, the percentage of hydrogen element was over 10.43 wt%, the morphology of the UV cured films was transformed from lusterless wrinkling to glossy smooth, and that the UV cured films of urushiol acetate also gave glossy smooth surface.
Co-reporter:Qinhui Chen;Hanyu Xue
Journal of Applied Polymer Science 2010 Volume 115( Issue 2) pp:1160-1167
Publication Date(Web):
DOI:10.1002/app.31227
Abstract
The polypropylene-graft-cardanol was prepared by reactive extrusion, which is solvent-free melt process, continuous processing, and controllable over residence time. The effect of monomer and initiator concentration on grafting ratio, grafting efficiency, and melt flow index (MFI) was also studied. The yield was quantified by UV–vis spectrometer. The chemical structure was investigated by infrared spectroscopy and gel ratio. A possible mechanism was supposed. The particular structure of cardanol can retain the MFI value of matrix resins and prevent polypropylene (PP) from being decomposed. The grafting ratio could be easily obtained from an experimental formula deduced from the linearity relationship between grafting ratio and MFI. The effect of cardanol grafted onto PP on the compatibility of PP and bamboo powder was studied by contact angle measurements, scanning electron microscopy, and tensile properties test. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Co-reporter:Jianrong Xia, Yanlian Xu, Binghuan Hu, Jinhuo Lin
Progress in Organic Coatings 2009 Volume 65(Issue 4) pp:510-513
Publication Date(Web):August 2009
DOI:10.1016/j.porgcoat.2009.04.006
Urushiol–metal polymers have attracted more and more attention in China because of their wide applications as a heavy anticorrosive coating in chemical industry. They could also offer many novel properties, including catalytic activity, magnetic property, semiconductive properties, flame retarding performance, etc., and significant progresses have been achieved in synthesis and study on the mechanism of these polymers. In this paper, a rapid method for fabrication of urushiol–copper(I) coordination polymer was developed under UV irradiation within 2 min. The formation and thermo-stability of the cured films were characterized by ESR, XPS, FT-IR, TGA, etc. The results suggested the coordination occurred between copper(I) ion and oxygen under UV irradiation. In the course of UV irradiation, the hydroxyl groups on the phenyl ring of urushiol were dissociated to urushiol semiquinone, and then coordinated with copper(I) ions generated by deoxidization of copper(II) ion. At the same time, crosslinking reaction on the long aliphatic unsaturated side chain occurred to form polymer. TG analysis showed that the polymer had excellent thermo-stability.
Co-reporter:Jianrong Xia, Yanlian Xu, Jinhuo Lin, Binghuan Hu
Materials Letters 2009 Volume 63(Issue 17) pp:1499-1501
Publication Date(Web):15 July 2009
DOI:10.1016/j.matlet.2009.03.055
A novel method was developed to embed PbS nanocrystal with rod-shape morphology and small size in UV cured polyurushiol matrix through coordination. In the course of UV irradiation, the crosslinking of the long unsaturated side chain on the phenyl ring of urushiol-lead monomer took place to form polyurushiol-lead polymer. The hydroxyl groups on the phenyl ring of urushiol acted as the coordination sites for lead ion aggregations, and the nanosized PbS particles were successfully assembled to form rod-shape morphology in situ at these sites with the release of S2− ions from thioacetamide. The phase and morphology of nanocomposites were characterized by XRD and TEM. The results showed that PbS nanocrystal was homogeneously dispersed in polyurushiol matrix with a typical diameter estimated to be ca. 3 nm, and with an average length about 8 nm. A possible formation mechanism of PbS nanocrystal in the polyurushiol matrix was also suggested based on the experimental results.
Co-reporter:Qin-hui Chen;Xue-fang Li;Jin-huo Lin
Journal of Forestry Research 2009 Volume 20( Issue 3) pp:271-274
Publication Date(Web):2009 September
DOI:10.1007/s11676-009-0047-6
The bamboo powder/polycaprolactone composites (BPPC) were prepared by torque-rheometer to investigate the effects of recipes and processing conditions on the rheological properties of BPPC. The morphological behavior and mechanical properties of BPPC were also studied. Results showed that the optimum recipe for composite materials is composed of 70% of polycaprolactone, 30% of bamboo powder according to volume, 1.6 % of aluminate coupling agent, 1.2% of stearic acid, and 2% of paraffin to bamboo powder according to mass ratio. The optimum processing condition parameters were determined as the rotational speed at 50 r·min−1 and the temperature at 100°C for BPPC. The BPPC (containing 30 copies bamboo powder) possessed eminent interfacial compatibility and mechanical properties of BPPC.
Co-reporter:Xue-fang Li;Qin-hui Chen;Jin-huo Lin;Dong-xian Zhuo
Journal of Forestry Research 2008 Volume 19( Issue 1) pp:
Publication Date(Web):2008 March
DOI:10.1007/s11676-008-0013-8
Chinese bamboo flour was chemically modified by acetylation with acetic anhydride by using trichloroacetic acid as an activation agent and the optimized condition for acetylation of bamboo flour was determined as the trichloroacetic acid amount 6.0 g per 1.5-g bamboo flour, ultrasosonication duration 40 min and the reaction time 1 h at 65°C. The composition, microstructure and thermal behavior of acetylated bamboo flour were preliminarily characterized by FT-IR, DSC and SEM etc. The acetylated bamboo flour can be molded into sheets at 130°C and 10 MPa, indicating the modified bamboo flour possesses thermalplastic performance.
Co-reporter:Weibin Bai, Xueqing Xiao, Qinhui Chen, Yanlian Xu, Sining Zheng, Jinhuo Lin
Progress in Organic Coatings (November 2012) Volume 75(Issue 3) pp:184-189
Publication Date(Web):1 November 2012
DOI:10.1016/j.porgcoat.2012.04.016
By grinding cardanol and anhydrous FeCl3 powder using a glass pestle in a mortar at ambient and solvent-free condition, a novel cross-linked polymer from cardanol, a renewable resource, was synthesized in high yield up to 80% in 5 min. The products were characterized through UV–vis, FT-IR, and 1H NMR; and the solvent-free grinding polymerization was consisted of Friedel–Crafts reaction, etherification reaction, and oxidative coupling reaction. The effect of these different techniques on spectral, thermal, optical, electrical, and morphological properties of polycardanol were investigated.Graphical abstractDownload full-size imageHighlights► Polycardanol can be synthesized by grinding cardanol and FeCl3 in high yield. ► The solvent-free grinding polymerization is consisted of three reactions. ► The polycardanol has high thermostability and shows blue emission (406 nm).
Co-reporter:Jianrong Xia, Yanlian Xu, Binghuan Hu, Jinhuo Lin
Progress in Organic Coatings (August 2009) Volume 65(Issue 4) pp:510-513
Publication Date(Web):1 August 2009
DOI:10.1016/j.porgcoat.2009.04.006
Urushiol–metal polymers have attracted more and more attention in China because of their wide applications as a heavy anticorrosive coating in chemical industry. They could also offer many novel properties, including catalytic activity, magnetic property, semiconductive properties, flame retarding performance, etc., and significant progresses have been achieved in synthesis and study on the mechanism of these polymers. In this paper, a rapid method for fabrication of urushiol–copper(I) coordination polymer was developed under UV irradiation within 2 min. The formation and thermo-stability of the cured films were characterized by ESR, XPS, FT-IR, TGA, etc. The results suggested the coordination occurred between copper(I) ion and oxygen under UV irradiation. In the course of UV irradiation, the hydroxyl groups on the phenyl ring of urushiol were dissociated to urushiol semiquinone, and then coordinated with copper(I) ions generated by deoxidization of copper(II) ion. At the same time, crosslinking reaction on the long aliphatic unsaturated side chain occurred to form polymer. TG analysis showed that the polymer had excellent thermo-stability.
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