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"LIVING" FREE RADICAL SYNTHESIS OF NOVEL RODCOIL DIBLOCK COPOLYMERS WITH POLYSTYRENE AND MESOGEN-JACKETED LIQUID CRYSTAL POLYMER SEGMENTS 被引量:2
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作者 宛新华 屠迎峰 +1 位作者 张东 周其凤 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1998年第4期377-380,共4页
The synthesis of rod-coil diblock copolymers was achieved for the first time by TEMPO-mediated 'living' free radical polymerization of styrene and 2,5-bis [(4-methoxyphenyl)oxycarbonyl] styrene(MPCS). The blo... The synthesis of rod-coil diblock copolymers was achieved for the first time by TEMPO-mediated 'living' free radical polymerization of styrene and 2,5-bis [(4-methoxyphenyl)oxycarbonyl] styrene(MPCS). The block architecture of the two diblock copolymers thus prepared, MPCS-b-St(5400/2400) and MPCS-b-St(10800/8700), was confirmed by GPC, DSC studies and the formation of multimolecular micelles. (Author abstract) 10 Refs. 展开更多
关键词 TEMPO 'living' free radical polymerization rodcoil diblock copolymer mesogen-jacketed liquid crystal polymer
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STUDY ON LIQUID CRYSTAL POLYMERS WITH TWO-DIMENSIONAL MESOGENIC UNITS 被引量:1
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作者 张春晓 李自法 +1 位作者 周其凤 周洪兵 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1993年第4期58-63,共6页
A series of liquid crystalline polymers with two-dimensional mesogenic units were synthesized by solution polycondensation at low temperature. All the polymers were liquid crystalline. The melting temperature T;(exce... A series of liquid crystalline polymers with two-dimensional mesogenic units were synthesized by solution polycondensation at low temperature. All the polymers were liquid crystalline. The melting temperature T;(except that with substituent of methoxy) and the clearing temperature T;of the polymers change regularly with varying of the length of the alkyl substituent groups. 展开更多
关键词 liquid crystal polymer Two-dimensional mesogenic unit N-2 ' 5 '-dihydroxy benzylidene-4-alkoxyaniline Monotropic nematics
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SYNTHESIS OF A NOVEL "MESOGEN-JACKETED LIQUID CRYSTAL POLYMER" BASED ON VINYLTEREPHTHALIC ACID 被引量:1
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作者 LIU Yuxiang ZHANG Dong +1 位作者 WAN Xinhua ZHOU Qifeng 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1998年第3期283-288,共6页
Poly{2,5-bis[(p-methoxyphenyl)oxycarbonyl]styrene}was successfully synthesized.This new polymer has a structure characteristic of mesogen-jacketed liquid cyrstalline polymers(MJLCPs)and does form a liquid crystal phas... Poly{2,5-bis[(p-methoxyphenyl)oxycarbonyl]styrene}was successfully synthesized.This new polymer has a structure characteristic of mesogen-jacketed liquid cyrstalline polymers(MJLCPs)and does form a liquid crystal phase above its glass transition.It thus became the starting member of a new series of MJLCPs.The synthesis of the polymer as well as the liquid crystalline properties of the polymer and its monomer was discussed.A brief comparison of the new monomer and polymer with some previously reported counterparts was also included. 展开更多
关键词 mesogen-jacketed liquid crystal polymer vinylterephthalic acid poly{2 5-bis[(p-ethoxyphenyl)oxycarbonyl]styrene}
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LIQUID CRYSTAL POLYMERS WITH TWO-DIMENSIONAL MESOGENIC UNITS 被引量:1
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作者 Qi Feng ZHOU Zhi Cai Robert W.LENZ 《Chinese Chemical Letters》 SCIE CAS CSCD 1991年第8期659-660,共2页
A series of 'liquid crystal polymers with two-dimensional mesogeuic units' were synthesized by the polycondensations of the monomer 2, 5-dihydroxybenzylidene-4-phenetidine with a diacid chloride selected from ... A series of 'liquid crystal polymers with two-dimensional mesogeuic units' were synthesized by the polycondensations of the monomer 2, 5-dihydroxybenzylidene-4-phenetidine with a diacid chloride selected from a series of α, ω-bis(4-chloroformylphenyloxy)carbonylalkues. This is the first series of polymers reported under the newly proposed concept 'liquid crystal polymers with two dimensional mesogenic units'. 展开更多
关键词 liquid crystal polymerS WITH TWO-DIMENSIONAL MESOGENIC UNITS
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NITROXIDE-MEDIATED FREE RADICAL SYNTHESIS OF MESOGEN-JACKETED LIQUID CRYSTAL POLYMERS
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作者 Xin-hua Wan Hui-lin Tu +5 位作者 Ying-feng Tu Dong Zhang Ling Sun Qi-feng Zhou Yu-ping Dong Mao Tang Department of Polymer Science & Engineering, College of Chemistry, Peking University, Beijing 100871, China Department of Materials & Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1999年第2期189-192,共4页
The first TEMPO-mediated 'living' free radical polymerization of liquid crystalline monomer, 2, 5-bis[(4-methoxyphenyl)oxycarbonyl]styrene (MPCS), was carried out at 130 degrees C with BPO as an initiator. The... The first TEMPO-mediated 'living' free radical polymerization of liquid crystalline monomer, 2, 5-bis[(4-methoxyphenyl)oxycarbonyl]styrene (MPCS), was carried out at 130 degrees C with BPO as an initiator. The molecular weight of the polymer can be varied from rather low values to high values while maintaining narrow polydispersity. It was observed that the polymerization of MPCS proceeded much faster than that of styrene. A tentative explanation for this fast polymerization was suggested. 展开更多
关键词 TEMPO 'living' free radical polymerization mesogen-jacketed liquid crystal polymer mesophase polymerization
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SYNTHESIS AND CHARACTERIZATION OF LIQUID CRYSTAL POLYMERS WITH T-SHAPED TWO-DIMENSIONAL MESOGENIC UNITS (Ⅱ)
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作者 李自法 郑世军 +4 位作者 张淑媛 曹少魁 李磊 刘广胜 周其凤 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1997年第1期65-73,共9页
A series of liquid crystalline polymers with T-shaped two-dimensional mesogenic unitswere synthesized via low temperature solution polycondensation of 2-(4'-alkoxy-phenyl)hydroquinone with various diacyl dichlorid... A series of liquid crystalline polymers with T-shaped two-dimensional mesogenic unitswere synthesized via low temperature solution polycondensation of 2-(4'-alkoxy-phenyl)hydroquinone with various diacyl dichlorides. The polymers were found to be nematic andshown thermotropic liquid crystalline behaviors through observations using DSC, polarizedmicroscopy and X-ray diffraction. The melting temperature T_m and the isotropizationtemperature T_i of the polymers change regularly with varying of the monomer structures. 展开更多
关键词 T-shaped two-dimensional mesogenic units liquid crystal polymer polymer synthesis
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SYNTHESIS AND CHARACTERIZATION OF LIQUID CRYSTAL POLYMERS WITH T-SHAPED TWO-DIMENSIONAL MESOGENIC UNITS
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作者 李自法 陈志军 +2 位作者 张淑媛 曹少魁 周其凤 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1996年第1期71-79,共9页
Two series of new liquid crystalline polymers with T-shaped two-dimensional mesogenic units were synthesized by low temperature solution polycondensations of 4-substituted N-2, 5-dihydroxybenzylidene aniline monomers ... Two series of new liquid crystalline polymers with T-shaped two-dimensional mesogenic units were synthesized by low temperature solution polycondensations of 4-substituted N-2, 5-dihydroxybenzylidene aniline monomers with different diacyl dichlorides. The polymers were found to be nematic and shown liquid crystalline behavior. The melting temperature T-m and the clearing temperature T-i of the polymers change regularly with varying of the monomer structures. 展开更多
关键词 liquid crystal polymer T-shaped two-dimensional mesogenic unit N-2 5-dihydroxybenzylidene-4-substituted aniline
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SYNTHESIS OF A GROUP OF MESOGEN JACKETED LIQUID CRYSTAL POLYMERS
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作者 朱兴隆 杨清传 周其风 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1992年第2期187-194,共8页
A group of the mesogen jacketed liquid crystal polymers based on the monomers 2,5-bis (4-substituted benzoyl)oxystyrenes are synthesized. The substituents include alkoxy, alkyl, and cyano groups. The synthesis and the... A group of the mesogen jacketed liquid crystal polymers based on the monomers 2,5-bis (4-substituted benzoyl)oxystyrenes are synthesized. The substituents include alkoxy, alkyl, and cyano groups. The synthesis and the primary characterization of the liquid crystal phase of the monomers and the polymers are described. While some of the monomers give smectic textures the polymers are found to be nematic above their melting or glass transition temperatures. Interestingly the unsubstituted monomer and its polymer poly 2,5-di( benzoyloxy ) styrene are also liquid crystalline. The single crystal structure of one of the monomers is also discussed. 展开更多
关键词 Mesogen jacketed liquid crystal polymers Rigid side chain liquid crystal polymers liquid crystal monomers 2 5-Bis (4-alkoxybenzoyl) oxystyrene 2 5-Bis (4-alkylbenzoyl) oxystyrene 2 5-b is (4-cyanobenzoyl) oxystyrene 2 5-bis (4-cyanobenzoyl) ox
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Nonlinear Liquid Crystal Polymer and Its Applications
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作者 SHI Yongji(Luoyang Technology College, Luoyang 471003,CHN) 《Semiconductor Photonics and Technology》 CAS 1996年第2期112-117,共6页
The transparent solid medium of a thermotropic liquid crystal polymer have a comb structure of mesogenic side chains which exhibit a nonlinear optical response of electronic origin.The main chain of the liquid crystal... The transparent solid medium of a thermotropic liquid crystal polymer have a comb structure of mesogenic side chains which exhibit a nonlinear optical response of electronic origin.The main chain of the liquid crystal polymers can be selected from a number of suitable polymerized monomeric and comonomeric structures such as polyvinyl,polysiloxane,polyoxyalkylene, polyester etc.The electrooptic light modulator is provided,which have potential to using in the systems of laser modulation and deflection,and information control in optical circuitry etc. 展开更多
关键词 Nonlinear Optics liquid crystal polymer Electrooptic Light Modulator
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Compact multilayer liquid crystal polymer lowpass filter with 8-shaped inductor
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作者 Liu Weihong Wang Guoxiu Liu Qingran 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2024年第3期80-86,共7页
Lumped element lowpass filter(LPF)for ultra-high frequency(UHF)radio frequency(RF)front-end system is presented based on multilayer liquid crystal polymer(LCP).The lumped element LPF can achieve miniaturization and on... Lumped element lowpass filter(LPF)for ultra-high frequency(UHF)radio frequency(RF)front-end system is presented based on multilayer liquid crystal polymer(LCP).The lumped element LPF can achieve miniaturization and one transmission zero on the stopband by the 8-shaped inductor.The lumped element LPF is fabricated on a 4-layer LCP substrate with a compact size of 9 mm×14 mm×0.193 mm.The measured cut off frequency of the lumped element LPF is 0.5 GHz with insertion loss(IL)less than 0.37 dB.Both measured and simulated results suggest that it is a possible candidate for the application of UHF RF front-end system. 展开更多
关键词 lowpass filter(LPF) multilayer liquid crystal polymer(LCP) MINIATURIZATION 8-shaped inductor
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Electrically Driven Crosslinked Liquid Crystal Polymers
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作者 Meng Wang Chuan-Fei Jiang Hong Yang 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2023年第21期2925-2938,共14页
Crosslinked liquid crystal polymers(CLCPs)are smart materials that combine the anisotropy of liquid crystals(LCs)with the elasticity of rubber.When subjected to external stimuli,they exhibit exceptional two-way shape ... Crosslinked liquid crystal polymers(CLCPs)are smart materials that combine the anisotropy of liquid crystals(LCs)with the elasticity of rubber.When subjected to external stimuli,they exhibit exceptional two-way shape memory behavior.Among the various stimuli,electrical energy has the advantages of cleanliness,stability,and high controllability;hence,it is widely used for controlling CLCP-based soft actuators,thus presenting potential for application in diverse,complex scenarios.By combining electrically driven mode and sensor equipment,precise control of CLCPs can be achieved,and the electrically driven CLCPs can accomplish more intricate and sophisticated tasks.This study presents a comprehensive review of electrically driven CLCPs with various driving mechanisms,including the electroclinic effect of ferroelectric CLCPs,the reorganization of LC molecules,the Maxwell effect of dielectric CLCPs,and the Joule heating effect of electrothermally responsive CLCP systems.In addition,a detailed analysis of the applications of electrically driven CLCPs in various research fields is presented.Finally,the current challenges in the field of electrically driven CLCP technology are summarized,along with predictions for future prospects. 展开更多
关键词 liquid crystal polymers Stimuli-responsive polymers Electrothermal materials Energy conversion Soft actuators
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An Azoester-containing Photoresponsive Linear Liquid Crystal Polymer with Good Mesophase Stability 被引量:6
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作者 Shu-Qiang Han Ying-Ying Chen +2 位作者 Bo Xu Jia Wei Yan-Lei Yu 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2020年第8期806-813,I0005,共9页
Photoresponsive linear liquid crystal polymers(LLCPs)are attractive because of the excellent stimuli-responsibility and the good processability.In this study,a new photoresponsive LLCP containing azoester(PC11AE6)with... Photoresponsive linear liquid crystal polymers(LLCPs)are attractive because of the excellent stimuli-responsibility and the good processability.In this study,a new photoresponsive LLCP containing azoester(PC11AE6)with good mesophase stability was synthesized by ringopening metathesis polymerization.By introducing photoresponsive azoester mesogenic unit,which has high rigidity and a large lengthdiameter ratio,the resultant polymer possesses a broad mesophase temperature interval(isotropic temperature=180℃).A study on mesophase by 2D-wide angle X-ray diffraction indicated that the mesogens were orientated spontaneously into smectic A phase after annealing.The orientated films and fibres exhibited macroscopic,rapid and reversible deformations under light irradiation as a result of the photoisomerization of azoester as confirmed by UV-Vis absorption spectrophotometry.We anticipate that this work provides a strategy for preparing LLCP with a broad mesophase temperature range,which is positive for potential applications. 展开更多
关键词 Ring-opening metathesis polymerization liquid crystal polymers Azoester Photodeformation
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A Luminescent Dicyanodistyrylbenzene-based Liquid Crystal Polymer Network for Photochemically Patterned Photonic Composite Film 被引量:3
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作者 Zhe-Wei Zhang Jun-Tao Li +2 位作者 Wan-Yuan Wei Jie Wei Jin-Bao Guo 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2018年第6期776-782,共7页
A novel photonic composite film based on a luminescent dicyanodistyrylbenzene-based liquid crystal polymer network(LCN) was fabricated by using a silica colloidal crystal as a template. The upper part of inverse opa... A novel photonic composite film based on a luminescent dicyanodistyrylbenzene-based liquid crystal polymer network(LCN) was fabricated by using a silica colloidal crystal as a template. The upper part of inverse opal structure and the luminescence characteristics of dicyanodistyrylbenzene-based moiety endowed the resulting bilayer photonic film with structural color arising from coherent Bragg reflection and fluorescence properties, respectively. A fluorescence enhancement phenomenon was observed in the photonic film due to the overlap between the reflection band and emission band of the fluorescent LCN. More importantly, the photo-induced irreversible Z/E photoisomerization of dicyanodistyrylbenzene-based moiety in the photonic film led to both a reflection spectral shift and an observable fluorescence variation. On the basis of this effective phototuning process, microscopic patterning of photonic film was developed under both fluorescence mode and reflection mode. The work demonstrated here provides a new route to construct photo-responsive photonic film. 展开更多
关键词 Luminescent liquid crystal polymer networks Photonic composite Photopatterning
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DIPOLE POLARIZATION RELAXATION AND MOLECULAR STRUCTURE OF MAIN-AND SIDE-CHAIN LIQUID-CRYSTALLINE POLYMERS
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作者 T.P.Stepanova L.L.Burshtein 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1996年第1期1-18,共18页
Molecular mobility in thermotropic polyesters and side-chain polymers with different struc-ture of mesogens and spacers has been studied by dielectrical method in dilutesolutions. The results made it possible to estab... Molecular mobility in thermotropic polyesters and side-chain polymers with different struc-ture of mesogens and spacers has been studied by dielectrical method in dilutesolutions. The results made it possible to establish the multiplicity of dielectric relaxationtransitions which reflects the small- and large-scale types of molecular motion. It was shownthat dielectric relaxation processes occurring in accordance with local mechanism (relaxationtimes 10^(-9)--10^(-7)s. and the activation energy 10--50kJ/mol) are due to the mobility of kineticchain elements of different length within a monomer units. It was found that the dielectricrelaxation process connected with a large-scale form of molecular motion (relaxation times10^(-5)--10^(-6)s. and the activation energy 100kJ/mol) did not depend on the molecular massbut was infiuenced by factors changing the conformational state of the macromolecule. It isestablished tha the cooperative reorientation mobility of associated mesogenic fragments isthe source of the large-scale process. 展开更多
关键词 liquid crystal polymers Dielectric polarization Relaxation transitions Dilute solution AGGREGATION
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Photo-actuated bending of chromatic liquid crystal polymer strips and laminates
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作者 You Yue Xu Changwei +2 位作者 Wang Binglian Jin Lihua Huo Yongzhong 《International Journal of Smart and Nano Materials》 SCIE EI 2011年第4期245-260,共16页
Photochromic liquid crystal polymer(LCP)films can undergo spontaneous mechanical deformations upon light illuminations.The light-induced strain is due to photoisomerization and the nematic–isotropic phase transition.... Photochromic liquid crystal polymer(LCP)films can undergo spontaneous mechanical deformations upon light illuminations.The light-induced strain is due to photoisomerization and the nematic–isotropic phase transition.A gradient strain exists due to absorption decay of the light intensity and will produce bending of LCP strips.Beam bending models are studied for single layered and bilayered LCP strips with substrate.The results show that the multilayered structures can have much larger bending curvature due to the utilization of the average light-induced contractions which were mostly not active for single-layered LCPs.Some structural optimizations for bilayered laminate are also discussed. 展开更多
关键词 liquid crystal polymer(LCP) photochromic film light-induced bending LAMINATE
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Restudy of the unusual phase behavior of the mesogen-jacketed liquid crystal polymers
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作者 ZHAO Yongfeng FAN Xinghe +2 位作者 CHEN Xiaofang WAN Xinhua ZHOU Qifeng 《Science China Chemistry》 SCIE EI CAS 2006年第2期116-125,共10页
A series of poly{2,5-bis[(4-butoxyphenyl)-oxycarbonyl]styrenes}(PBPCS)with low mo-lecular weight distribution was synthesized by atom transfer radical polymerization(ATRP).The me-somorphic properties were investigated... A series of poly{2,5-bis[(4-butoxyphenyl)-oxycarbonyl]styrenes}(PBPCS)with low mo-lecular weight distribution was synthesized by atom transfer radical polymerization(ATRP).The me-somorphic properties were investigated by differential scanning calorimetry(DSC),polarizing optical microscopy(POM)and rheometer.PBPCS showed the phase transition from isotropic into liquid crystal(LC)phase,and the LC phase formed at high temperature and disappeared in the subsequent cooling procedure.Using the WAXD fiber pattern,the phase structure of the PBPCS at higher tem-perature showed hexagonal columnar nematic phase.Experimental results demonstrated that the driving force of the entropy is an important factor during the unusual LC phase formation of PBPCS. 展开更多
关键词 mesogen-jacketed liquid crystal polymers RHEOLOGY hexagonal columnar nematic phase.
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Self-assembly and UV-curing Property of Polymerized Lyotropic Liquid Crystal Monomer of Sodium 3,4,5-tris(ll-acryloxyundecyloxy)benzoate 被引量:1
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作者 白玉勤 郭金宝 +1 位作者 王影 魏杰 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2013年第1期95-101,I0004,共8页
A polymerized lyotropic liquid crystal monomer of sodium 3,4,5-tris(11-acryloxyundecyloxy)- benzoate was synthesized by a convenient route starting from 3,4,5-trihydroxybenzoic acid via esterification followed by et... A polymerized lyotropic liquid crystal monomer of sodium 3,4,5-tris(11-acryloxyundecyloxy)- benzoate was synthesized by a convenient route starting from 3,4,5-trihydroxybenzoic acid via esterification followed by etherification, acylation and finally neutralization. The chemi- cal structure was confirmed by Fourier transform infrared (FT-IR) and 1H nuclear magnetic resonance spectral analysis. The self-organization behavior of the monomer with deionized water in methanol at room temperature was also demonstrated. The assemblies were char- acterized by polarized optical microscope and X-ray diffraction. The results show that a solution containing 80:20 of the monomer to water was found to be able to self-organize into Lamellar (La) phase and 92:8 with inverted hexagonal (H]I) phase, which was in ac- cordance with the theoretical calculation of critical packing parameter. It suggests that the concentration of the monomer was the key factor to influence assembly structure. Addi- tionally, the acrylate conversion with different photoinitiators and nanostructure retention after polymerization were investigated. The research shows that the acrylate conversion of the monomer with Darocur2959 could reach up to 78% when irradiated by 30 mW/cm2 UV light of 365 nm for 30 min characterized by Real-time FT-IR as well as the sol-gel method. Meanwhile, the La and HII phase nanostructures were both retained after polymerization. 展开更多
关键词 polymerized lyotropic liquid crystal SELF-ASSEMBLY La phase HII phase UV-CURING
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Electrically tunable holographic polymer templated blue phase liquid crystal grating 被引量:2
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作者 何正红 陈超平 +7 位作者 朱吉亮 袁亚超 李燕 胡伟 李潇 李洪婧 陆建刚 苏翼凯 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第6期328-333,共6页
In this paper, we demonstrate an alternative approach to fabricating an electrically tunable holographic polymer tem- plated blue phase liquid crystal grating. This grating is obtained by preforming a polymer template... In this paper, we demonstrate an alternative approach to fabricating an electrically tunable holographic polymer tem- plated blue phase liquid crystal grating. This grating is obtained by preforming a polymer template comprised of periodic fringes, and then refilling it with a blue phase liquid crystal. Compared with conventional holographic polymer dispersed liquid crystal gratings, our grating can remarkably reduce its switching voltage from 200 V to 43 V while maintaining a sub-millisecond response time. The holographic polymer templated blue phase liquid crystal (HPTBPLC) grating is free from electrode patterning, thus leading to a lower cost and more flexible applications. 展开更多
关键词 holographic polymer dispersed liquid crystal blue phase phase grating
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Kinetics investigations for holographic Bragg grating based on polymer dispersed liquid crystal 被引量:1
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作者 郑致刚 宋静 +6 位作者 张伶莉 刘永刚 郭福忠 马骥 李文萃 邓舒鹏 宣丽 《Chinese Physics B》 SCIE EI CAS CSCD 2008年第9期3227-3235,共9页
This paper investigates the monomer kinetics of polymer dispersed liquid crystal (PDLC) grating. Fourier transform infrared (FTIR) spectra are used in the studies of photoreaction kinetics. The results indicate th... This paper investigates the monomer kinetics of polymer dispersed liquid crystal (PDLC) grating. Fourier transform infrared (FTIR) spectra are used in the studies of photoreaction kinetics. The results indicate that there is a relative stable stage arises after a very short initial stage. Based on FTIR studies, the monomer diffusion equation is deduced and necessary numerical simulations are carried out to analyse the monomer conversion which is an important point to improve phase separation structure of PDLC grating. Some simulation results have a good agreement with experimental data. In addition, the effects induced by monomer diffusion constant D and diffusion-polymerization-ratio rate R are discussed. Results show that monomer conversion can be improved by increasing value of D. Besides, a good equilibrium state (R = 1) is more beneficial to the diffusion of monomer which is important in the process of phase separation. 展开更多
关键词 polymer dispersed liquid crystal diffusion kinetics Bragg grating
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Cellulose-based Polymeric Liquid Crystals as a Biomimetic Modifier for Suppressing Protein Adsorption 被引量:2
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作者 司徒方民 TAN Ruizhe +6 位作者 GONG Lei ZHA Zhengang 屠美 ZENG Rong WU Hao ZHANG Jiaqing ZHENG Liheng 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第2期416-422,共7页
A novel biomimetic protein-resistant modifier based on cellulose-based polymeric liquid crystals was described(PLCs). Two types of PLCs of propyl hydroxypropyl cellulose ester(PPC) and octyl hydroxypropyl cellulos... A novel biomimetic protein-resistant modifier based on cellulose-based polymeric liquid crystals was described(PLCs). Two types of PLCs of propyl hydroxypropyl cellulose ester(PPC) and octyl hydroxypropyl cellulose ester(OPC) were prepared by esterification from hydroxypropyl cellulose, and then were mixed with polyvinyl chloride and polyurethane to obtain composite films by solution casting, respectively. The surface morphology of PLCs and their composite films were characterized by polarized optical microscopy(POM) and scanning electron microscopy(SEM), suggesting the existence of microdomain separation with fingerprint texture in PLC composite films. Water contact angle measurement results indicated that hydrophilicity of PLC/polymer composite films was dependent on the type and content of PLC as well as the type of matrix due to their interaction. Using bovine serum albumin(BSA) as a model protein, protein adsorption results revealed that PLCs with protein-resistant property can obviously suppress protein adsorption on their composite films, probably due to their flexible LC state. Moreover, all PLCs and their composites exhibited non-toxicity by MTT assay, suggesting their safety for biomedical applications. 展开更多
关键词 polymeric liquid crystals cellulose biomimetic protein adsorption biocompatibility
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