导电高分子聚苯胺及其应用

聚苯胺 (PANI)是研究最为广泛的导电高分子材料。本文介绍了导电高分子的掺杂原理和常用方法 ,以及PANI的结构与性能 ,综述了PANI的一些主要应用研究和领域     

导电聚苯胺的乳液聚合

本文采用水－二甲苯－十二烷基苯磺酸乳液体系合成导电聚苯胺,对水－二甲苯的最佳配比关系进行了摸索;并将所得的产物同质子配水溶液法合成所得产物进行对比,从电导率、表观形貌、微观形貌、红外分析等各方面进行了分析和比较。     

导电聚苯胺材料的乳液聚合研究进展

认为乳液聚合法是改善聚苯胺可加工性的一条有效途径，并介绍了当今若干新兴的乳液聚合法在制备导电高分子方面的运用，对其中已实步用于制备聚苯胺的微乳液聚合、核壳乳液聚合等几种乳液聚合方法进行了较全面的阐述。     

聚合方法对聚苯胺导电性能的影响

采用溶液聚合与乳液聚合两种方法分别合成了导电高分子材料聚苯胺（ＰＡｎ）并对其性能进行了比较研究,实验结果表明,不同的聚合方法影响聚合物的产率,溶解度,分子量,导电性,环境稳定性以及微观结构等性能。     

聚苯胺导电聚合物应用新进展

简单介绍了近年来聚苯胺导电材料的研究进展及应用现状,指出了聚苯胺在应用中存在的一些问题,并展望了聚苯胺导电材料今后的发展方向和应用前景.     

导电聚苯胺的特性,应用及进展

导电聚苯胺是极有前途的导电聚合物，它能够广泛地应用于二次电池、金属的防腐、电致发光器件的电极修饰等方面。文中综述了导电聚苯胺的结构、特性、应用前景、进展及其面临的问题．     

导电聚苯胺的聚合方法及应用研究进展

概述聚苯胺作为导电聚合物的不同特性,以及近些年聚苯胺聚合方法的研究进展。与其他导电聚合物相比,聚苯胺优点突出且制备方法众多,本文总结归纳出不同的制备方法,包括化学氧化聚合、电化学聚合、模板聚合、酶聚合作用、等离子体聚合、光致聚合等,且对不同方法制备出的聚苯胺结构性能作介绍。最后,总结不同形态的聚苯胺的制备方法,并简述聚苯胺在不同领域中的应用现状。     

导电高分子聚苯胺及其复合研究进展

导电聚合物的突出优点是既具有金属和无机半导体的电学和光学特性,又具有有机聚合物柔韧的机械性能和可加工性,还具有电化学氧化还原活性.MacDiamid,Heeger和白川英树因在导电聚合物的发现和发展中作出的突出贡献共同获得2000年度诺贝尔化学奖.聚苯胺因具有制备简单(可通过化学氧化聚合批量生产)、成本低廉、稳定性好、可制备成导电聚苯胺溶液等突出优点,成为最有应用前景的导电聚合物之一.     

导电高分子聚苯胺及其复合研究进展

导电聚合物的突出优点是既具有金属和无机半导体的电学和光学特性,又具有有机聚合物柔韧的机械性能和可加工性,还具有电化学氧化还原活性。Mac Diamid,Heeger和白川英树因在导电聚合物的发现和发展中作出的突出贡献共同获得2000年度诺贝尔化学奖。聚苯胺因具有制备简单(可通过化学氧化聚合批量生产)、成本低廉、稳定性好、可制备成导电聚苯胺溶液等突出优点,成为最有应用前景的导电聚合物之一。     

导电聚苯胺的热稳定性

导电聚苯胺的电导率热稳定性一直是涵待解决的问题。由于这一问题的存在，聚苯胺难以保证经过常见工程塑料加工温度（如PC/ABS的235℃混炼温度）热处理后电导率不发生大幅度减弱甚至变为绝缘体。然而，综观国内外有关聚苯胺热稳定性理论和实验研究的文献十分有限。结合目前国内国际的研究状况，总结和分析了聚苯胺热稳定性的改善，提出了改善聚苯胺热稳定性能的方法，同时也为制备聚苯胺类导电塑料给出了一些创新性建议。     

Time dependent piezoresistive behavior of polyvinylidene fluoride/carbon nanotube conductive composite

A piezoresistive nanocomposite was prepared by melt blending multiwall carbon nanotubes (MWCNT) into polyvinylidene fluoride (PVDF). Three time dependencies were examined: quasi-static, transient and cyclic fatigue. The transient response of the strain with time showed viscoelastic behavior that was modeled by the 4-element Burger model. Under quasi-static loading the resistance showed negative pressure coefficient below yield but changed to positive pressure coefficient after yield. The transient time dependence was not observed in the resistance measurements. Under cyclic load, the stress-time and resistance-time were synchronous but the resistance peak value decreased with increasing cycles, which was attributed to charge storage in the nanocomposite.     

The growth of nickel nanoparticles on conductive polymer composite electrodes

Uniformly sized and dispersed nickel core-shell nanoparticles on polypyrrole have been grown by electrodeposition. Two principal types of Ni particle morphologies were observed: small Ni nanocrystallites ranging in diameter from 7 to 12 nm, and larger spherical Ni clusters of 100 nm to over a micron in size. The type of Ni nanoparticles deposited depends sensitively on the preparation of the conducting polymer substrate. The optimal deposition conditions for the small Ni nanocrystallites were determined. TEM diffraction and XPS analysis show that these nanoparticles are predominantly NiO.     

电磁屏蔽涂料制备的新进展

从导电填料的种类、复合工艺及其对涂料导电性能的影响等方面,综述了近五年来掺和型电磁屏蔽涂料制备的最新进展.金属、石墨和复合导电填料等都具有良好的导电性,尤以复合导电填料应用效果最好;原位插层复(聚)合法是制备电磁屏蔽材料的一种较新复合工艺,可获得低逾渗阀值和高导电率,具有良好的发展前景;同时,导电填料的用量、性状、分散效果以及分散助剂等对电磁屏蔽涂料的导电性能都有较大影响.     

Fabrication of high-quality silver nanowire conductive film and its application for transparent film heaters

Here,we report a facile method to produce pure silver nanowires (AgNWs) with high yield.A highly conductive dispersant was used to ensure uniform dispersion of the AgNWs.Without any posttreatment,the AgNW networks,deposited on flexible substrates,showed excellent optoelectrical performance owing to minimal junction resistance between the AgNWs.To explore their potential in flexible optoelectronic devices,a transparent film heater was constructed based on the present AgNW networks.The heater could achieve rapid response at low input voltage and reach a relatively high temperature in a short response time.Since this high-quality AgNW film exhibits relatively low production costs and fast production time,it may have value for future electronic industry applications.     

Fabrication and characteristic of conductive and ferromagnetic hollow composite microcapsules

The fabrication of conductive and ferromagnetic hollow composite microcapsules with polypyrrole (PPy) shell and Fe₃O₄ inner-wall was successfully accomplished via a sequential processes of electrostatic attraction between negatively charged polystyrene (PS) latex and Fe₃O₄ nanoparticles, the polymerization of pyrrole and the dissolution of PS core. The morphology of the hollow composite microcapsules was testified by TEM and XRD. The hollow microcapsules possessed a conductivity of 10^− 2 S/cm, and their ferromagnetic property was attributed to the presence of magnetic Fe₃O₄ nanoparticles on the inner-wall. The improved thermal stability of the hollow microcapsules could be interpreted due to the interaction between Fe₃O₄ nanoparticles and PPy chains.     

Highly conductive and transparent carbon nanotube composite thin films deposited on polyethylene terephthalate solution dipping

In this letter we present highly conductive and transparent thin films of single-walled carbon nanotubes (SWCNT) and conductive polymer composite deposited on polyethylene terephthalate film substrates by solution dipping. The initial results show that 66 Ω/? sheet resistance can be achieved with 80% transmission at the wavelength of 550 nm. This result is much superior to the performances of the pure SWCNT thin films deposited using the same technique. The improvement is attributed to the increase of effective electric conductive tube-tube junctions in the CNT network.     

A flexible conductive hybrid elastomer for high-precision stress/strain and humidity detection

Flexible and environment-responsive materials are essential for a large number of applications from artificial skin to wearable devices. The present study develops a flexible, ultra-low cost conductive hybrid elastomer(CHE), which possesses high responsive capabilities to stress/strain and humidity. CHE was composed of polydimethylsiloxane(PDMS) and starch hydrogel(SH), enabling great elasticity(56 kPa),high conductivity(10~(-2)S/m) and high sensitivity to external stimuli(gauge factor of CHE under stress and strain are 0.71 and 2.22, respectively, and sensitivity to humidity is 1.2 × 10~(-6)S/m per RH%). These properties render CHE a promising candidate for artificial skin and wearable electronics applications of continuously monitoring environmental information.     

CNTs/ UHMWPE composites with a two-dimensional conductive network

A low percolation threshold can be achieved for the conductive polymer composites(CPC) materials having a segregated structure in which the conductive particles like carbon black (CB), carbon nanotubes (CNTs), etc. are only located on the interface of the polymer matrix particles instead of being randomly distributed in the whole system. Multiwalled carbon nanotubes (MWNTs) were experienced alcohol-assisted dispersion under ultrasonication and intense mechanical mixing, and only located on the interfaces of the ultrahigh molecular weight polyethylene (UHMWPE) matrix particles to form a segregated structure. The morphological observation and the critical exponent t value obtained from the classical threshold mechanism indicate that the MWNTs/UHMWPE composites form a 2-dimension conductive network, which leads to a very low percolation of 0.072vol%.     

导电高分子材料的进展

主要论述了导电高分子材料的种类、发展概况及其应用 ,对新近开发的复合型导电高分子材料产品进行了介绍 ,并对导电高分子材料的发展进行了展望。     

导电聚合物及导电聚吡咯的研究进展

综述了导电聚合物的发展历史，导电聚合物的结构特征和基础性能、导电聚合物的类型及其合成方法；然后重点介绍了导电聚吡咯的研究进展。