功能性导电聚苯胺纤维的制备与性能分析

聚苯胺(PANI)是高分子化合物中的一种,其具有特殊的电学、光学性质,经掺杂后兼具导电性和电化学性能.作为一种带有共轭双键的结构型导电高分子,聚苯胺在开发及制备各种具有特殊功能的设备和材料领域中有较大的应用前景.采用苯胺作为原料,十二烷基苯磺酸作为掺杂剂,在水相中添加少量的聚乙烯吡咯烷酮,制备了具有纳米纤维结构的聚苯胺...     

用乳液聚合法制备聚苯胺／SBS导电复合材料

在１５－２０℃下，以十二烷基苯磺酸做乳化剂和掺杂剂，苯胺在溶有ＳＢＳ的有机溶剂中聚合２４ｈ下，可制备聚苯胺／ＳＢＳ导电复合材料。该复合材料可热成型或溶液成型，所得试样表现出不同的逾渗域值：前者的ＰＡｎ＝－ＤＢＳＡ质量分数为２０％，后者为１５％；     

聚苯胺的制备及其导电性能

以苯胺为单体,过硫酸铵为氧化剂,盐酸为掺杂酸,采用化学氧化法制备出盐酸掺杂聚苯胺(PANI-HA),研究了过硫酸铵与苯胺单体摩尔比(n APS:n An)、HCl浓度、反应温度和反应时间对PANI-HA电导率的影响;采用正交分析法研究了各影响因素对PANI-HA电导率的主次关系。结果表明:影响PANI-HA电导率的主次关系为反应温度n APS:n An反应时间HCl浓度;制备PANI-HA的最佳工艺为nAPS:n An=1.0,HCl浓度1.0 mol/L,反应温度10℃,反应时间8 h。     

聚苯胺导电复合材料的制备及其性能研究

通过原位乳液聚合制备了PANI-HCl/P(MMA-BA)导电复合材料,对其导电率进行测试,并用FTIR、STA、XPS对导电复合材料的结构、热学性能、掺杂率进行了表征。结果表明:当APS/ANI摩尔比为1:1.5、反应单体中ANI为33%时,导电复合材料中PANI表面掺杂率为37.56%,复合材料电导率达到1.472×103S/cm。FTIR谱图表明导电复合材料分子结构中存在C=O、N=Q=N、N-B-N等基团,说明共聚物P(MMA-BA)已经存在于复合材料中。STA测试结果表明:导电复合材料的玻璃化温度(Tg)为127℃,在270℃以下稳定性较好,通过原位乳液复合所得PANI-HCl/P(MMA-BA)导电复合材料的加工性及热稳定性能得到了改善。     

导电聚苯胺的制备方法及应用

综述了导电聚苯胺的研究进展,采用对比的方法详细介绍了聚苯胺的合成方法及其改进措施,简要介绍了聚苯胺在二次电池及传感器件等方面的应用研究,指出了聚苯胺研究中存在的问题,并对聚苯胺研究的前景进行了展望。     

导电聚苯胺/聚乙烯醇复合乳液的制备研究

以聚乙烯醇为树脂基体 ,通过乳液氧化聚合同步搀杂有机酸 ,研究了聚苯胺 /聚乙烯醇复合乳液的制备。结果表明 ,过硫酸铵的用量对聚苯胺的产率影响较大 ,当氧化剂 /苯胺的摩尔比达到 2时 ,产率为95% ,高于溶液法的原料比例。十二烷基苯磺酸和聚乙烯醇 (88%醇解度 )对聚苯胺乳胶的粒径亦有影响。在聚苯胺 /聚乙烯醇复合膜中 ,当聚苯胺含量超过 2 0 %后 ,电导率趋向稳定 ,可达 2 .3 s/ cm     

聚苯胺导电复合材料的制备及性能研究

通过原位乳液聚合制备了PANI-HCI/P(MMA-BA)导电复合材料,对其导电率进行测试,并用FTIR、STA、XPS对导电复合材料的结构、热学性能、掺杂率进行了表征.结果表明:当APS/ANI摩尔比为1:1.5、反应单体中ANI为33%时,导电复合材料中PANI表面掺杂率为37.56%,复合材料电导率达到1.472×103S/cm.FTIR谱图表明导电复合材料分子结构中存在C=O、N=Q=N、N、-B-N等基团,说明共聚物P(MMA-BA)已经存在于复合材料中.STA测试结果表明:导电复合材料的玻璃化温度(Tg)为127℃,在270℃以下稳定性较好,通过原位乳液复合所得PANI-HCI/P(MMA-BA)导电复合材料的加工性及热稳定性能得到了改善.     

TiN/聚苯胺复合膜的制备及其导电性能探讨

采用微粒填充法技术制备了TiN/聚苯胺复合膜,对复合膜的导电性能以及对废水的光降解能力进行了探讨。结果表明TiN/聚苯胺复合膜具有良好的导电性能,并可有效的处理含有活性艳红(X-3B)染料的废水。     

微乳液法制备导电聚苯胺的研究

采用微乳液法制备了导电聚苯胺 ,并详细讨论了聚合温度和氧化剂用量对聚苯胺粒子的粒径、导电性能和分子结构等影响     

聚苯胺导电性能的研究进展

聚苯胺是应用最为广泛的导电高分子材料之一,也是一类具有特殊功能的新型材料;其在隐形材料、防腐材料、抗静电材料等方面都有应用。文中主要阐述了聚苯胺的结构、导电机理及不同酸掺杂和聚合法等多种因素对聚苯胺导电性的影响,同时也对导电聚苯胺的应用前景进行了展望。     

原位乳液聚合制备导电性聚苯胺/氯磺化聚乙烯复合材料及其性能

以十二烷基苯磺酸为乳化剂及掺杂剂,由二甲苯及水组成乳液,在氯磺化聚乙烯存在下,采用一步原位乳液聚合法制备了聚苯胺／氯磺化聚乙烯(PAn／CSPE)导电复合材料。研究了用熔融法(MP)或溶液法(SP)加工复合物材料的导电性及力学性能,并进行了表征。结果表明,MP法制得的复合材料在导电性及力学性能方面优于SP法制得的复合材料;当PAn质量分数为12％～18％时,MP法复合材料呈现热塑性弹性体行为,拉伸强度为6～8MPa,扯断伸长率大于400％,永久变形小于30％。当PAn质量分数小于18％时,SP法复合材料用闻甲酚二次渗杂后的导电率比原复合材料高出6个数量级,且其导电渗滤阈值由PAn质量分数22％降至3％。     

聚苯胺的合成与聚合机理研究进展

近年来,聚苯胺因其优良的性能而备受关注,其合成方法与合成机理一直是聚苯胺研究的重要内容之一.本文详细阐述了聚苯胺的化学氧化和电化学合成方法,并对两类合成方法的反应机理进行了综述.     

Lamotrigine‐loaded polyacrylate nanoparticles synthesized through emulsion polymerization

A series of copolymeric nanoparticles of the partially water‐soluble monomer ethyl methacrylate and the water‐soluble monomer 2‐hydroxyl ethyl methacrylate were synthesized from emulsions containing sodium dodecyl sulfate via free‐radical polymerization. Lamotrigine, as a model drug, was loaded in nanoparticles during in situ polymerization. A stable and transparent poly(ethyl methacrylate‐co‐hydroxyl ethyl methacrylate) nanolatex was produced for all compositions and characterized for particle size by dynamic light scattering and transmission electron microscopy. Particles were found to be smaller than 50 nm in size. Structural characterization of copolymers was done by infrared spectrometry, gel permeation chromatography, and NMR spectroscopy. Drug encapsulation efficiency was determined by ultraviolet (UV)–visible spectrometry and was found to be 26–62% for copolymers with different compositions. UV data suggest molecular‐level dispersion of the drug in the nanoparticles. In vitro drug‐release studies showed the controlled release of lamotrigine. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Preparation of conductive polyaniline/chlorosulfonated polyethylene composites via in situ emulsion polymerization and study of their properties

The conductive composites of polyaniline (PAn) and chlorosulfonated polyethylene (CSPE) were prepared by polymerization of aniline in the presence of CSPE, using a direct, one‐step in situ emulsion polymerization method. The polymerization of aniline was performed in an emulsion comprising water and xylene containing CSPE in the presence of dodecylbenzene sulfonic acid, which acts both as a surfactant and a dopant for PAn. The composites can be processed by either melt method (MP) or solution method (SP). Conductivity of the composites obtained by different processing methods shows different percolation thresholds: 14 wt % for MP samples and 22 wt % for SP samples. At the same content of PAn, the conductivity of MP composites is higher than that of SP composites. The relationships between mechanical properties and PAn content obtained by the two different processing methods were also investigated. When PAn content of MP samples is between 12 and 18 wt %, the composites behave like a thermoplastic elastomer with tensile strength at 6–8 MPa, ultimate elongation > 400% and permanent set < 30%. The conductivity of composites obtained by SP method after secondary doping with m‐cresol is about 6 orders of magnitude higher than the original at below 18 wt % PAn content and the percolation threshold for conductivity is lowered to 3 wt % PAn content. The composite shows no electrochromic activity in acidic solution of LiClO₄ in propylene carbonate, but after secondary doping exhibits electrochromic activity even in neutral electrolyte. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 845–850, 2000     

Novel hydrophilic N-halamine polymer with enhanced antibacterial activity synthesized by inverse emulsion polymerization

N-halamine-based antibacterial agents have high efficiency and rechargeable antibacterial properties. However, their applications are limited due to their complex synthetic process and fuzzy antibacterial mechanism. In this study, a novel N-halamine antibacterial polymer was synthesized by inverse emulsion polymerization and characterized by Fourier transform infrared, nuclear magnetic resonance, scanning electron microscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy. Due to the difficulty of purification, most of the subjects studied previously were hydrophobic polymers, while little research on hydrophilic polymers. In this experiment, this difficulty was overcome by controlling the dosage of sodium hypochlorite and methods of dialysis. Because of the complex cell structure of Gram-negative bacteria, it is difficult for N-halamines to release the oxidizing chlorine into the cell. However, the hydrophilic N-halamines can solve this problem, which showed a stronger antibacterial effect on Gram-negative Escherichia coli synthesized in this study. In addition, the particle size and hydrophilic property of the polymer were changed by changing the amount of initiator, and the differences in their antibacterial properties were studied. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47419.     

原位乳液聚合聚苯胺/聚甲基丙烯酸甲酯复合物及其表征

以DBSA为乳化剂和掺杂剂,在水介质中采用原位乳液聚合法制备出了聚苯胺/聚甲基丙烯酸甲酯(PANI/PMMA)复合物。采用扫描电镜、红外光谱分析、紫外光谱分析、热失重分析、X射线光电子能谱分析对PANI/PMMA复合物进行了表征。结果表明:复合物产物粒径在80～120nm;电导率可达到10-2S/cm,接近于乳液聚合得到的DBSA掺杂态PANI;乳化剂DBSA以掺杂剂和稳定剂两种状态存在于复合物中。     

新型两性聚合物絮凝剂的反相乳液法制备及性能研究

通过反相乳液法合成了一系列两性共聚物Poly(AM-DMPS),并研究了该两性共聚物对黏土的絮凝效果,结果发现,该两性共聚物对黏土有较好的絮凝效果,同时对絮凝现象进行了机理探讨.     

乳液聚合中成核机理的研究进展

主要介绍了在乳液聚合反应中,各种成核过程的机理及其对乳液聚合反应和性能的影响;分析了胶束成核、均相成核、液滴成核的产生条件与影响因素;介绍了成核机理的最新研究进展.     

Synthesis of polyaniline nanofiber and copolymerization with acrylate through in situ emulsion polymerization

Polyaniline (PANI) was prepared, respectively, by direct mixed oxidation method in different acids. Scanning electron microscopy showed that high quality of PANI nanofibers can be obtained easily in hydrochloric acid, sulfuric acid, and acetic acid, especially in the sulfuric acid; infrared and ultraviolet spectra characterization showed all products were the doped PANI. Then, using complex emulsifiers, PANI was dispersed in acrylate emulsion by supersonic dispersion assisted with mechanical stirred to obtain mixed pre‐emulsion, the result showed different PANI performed different dispersing stability in the pre‐emulsion. More importantly, PANI–polyacrylate copolymer was prepared through multi‐steps in situ emulsion polymerization using water‐soluble azo (VA‐044) as initiator. Experiment showed that good dispersing stability of PANI in the pre‐emulsion was premise to obtain the final stable copolymer emulsion. Further, the micro‐morphology and thermal property of the copolymer were studied by transmission electron microscopy, differential scanning calorimetry, and thermogravimetric analyzer. The result proved that acrylate occurred in situ polymerization on surface of PANI nanofibers, the presence of PANI increased glass transition temperature (T_g) and thermal decomposed temperature of the copolymer. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

聚苯胺溶解性研究

以苯胺氧化聚合和乳液聚合两种方法合成聚苯胺(PAn),研究了溶剂、聚合方法、反应温度、导电态、十二烷基苯磺酸用量等因素对聚苯胺溶解性的影响。结果表明,N-甲基吡咯烷酮是本征态聚苯胺的良溶剂,用乳液聚合法合成的聚苯胺其溶解性明显高于化学氧化法合成的聚苯胺,当乳液中十二烷基苯磺酸∶苯胺(摩尔比)=2.0∶1,聚合温度25℃时合成溶解率大的PAn。