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聚苯胺/纳米二氧化锰复合材料Ⅰ.原位氧化合成制备 总被引:6,自引:1,他引:6
用固相合成法制备了纳米二氧化锰(nm-MnO2),并通过原位聚合法制备了聚苯胺/纳米二氧化锰复合材料。研究结果表明:在苯胺/nm-MnO2的盐酸反应体系中,nm-MnO2可以使苯胺氧化聚合。在一定的nm-MnO2用量下,聚苯胺的产率随苯胺添加量的增加而下降,nm-MnO2在产物中的含量也随之下降,且含量很低。在苯胺:/nm-MnO2/过硫酸铵的反应体系中,研究了Nm-MnO2通过两种不同的加料方式原位制备PA-NI/nm-MnO2复合材料的合成条件。第一种方式为nm-MnO2和过硫酸铵同时与苯胺混合,一起参与苯胺的氧化聚合。第二种方法是先将过硫酸铵和苯胺混合,3min后再将nm-MnO2加入反应体系中。研究表明:第一种加料方式得到的队NI/nm-MnO2中nm-MnO2的含量很低;第二种加料方式可以得到高nm-MnO2含量(w=0.14-0.73)的产物,其电导率约10^-4S/cm。 相似文献
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导电聚苯胺的合成、结构、性能和应用 总被引:41,自引:0,他引:41
概述了中国科学院长春应用化学研究所对导电聚苯胺合成、结构、性能和应用的研究.从合成可溶性的聚苯胺入手,阐明了聚苯胺的若干基本化学和结构问题,提出并证明了掺杂态聚苯胺的结构模型和掺杂机理;除了质子酸掺杂外,发现了聚苯胺的碘氧化掺杂、光助氧化掺杂和K+注入还原掺杂;开发了分别以环氧树脂和聚氨酯为载体的聚苯胺防腐涂料;运用掺杂剂诱导的溶解性,通过合成带聚乙二醇链的膦酸掺杂剂,实现了导电态聚苯胺的水体系加工.其中的聚苯胺树脂及防腐涂料的生产技术,已经完成中试,正在走向产业化. 相似文献
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聚苯胺/聚乙烯醇导电复合膜的制备及性质研究 总被引:13,自引:0,他引:13
用较简单的化学氧化现场吸附聚合法(in-situpolymerization)制得了聚苯胺(PAn)/聚乙烯醇(PVA)导电复合膜.该膜具有较好的导电性和机械性能;其电导率可达5.8s/cm,拉伸强度达13MPa,断裂伸长率为110%左右.本文讨论了制备的各种条件对复合膜导电性能及力学性能的影响、稳定性及电化学活性;并采用循环伏安曲线、扫描电镜(SEM)、FTIR谱及元素分析对该复合膜的结构和性能进行了表征. 相似文献
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二氧化锰氧化制备聚苯胺及其超级电容性能 总被引:1,自引:1,他引:0
以二氧化锰为氧化剂在酸水体系中化学氧化制备了聚苯胺(PANI),考察了聚合条件对产率的影响。采用红外光谱、扫描电镜等手段对PANI的结构与形貌进行了表征,采用电化学工作站对其电化学电容性能进行了测试。结果表明:PANI产率随着体系中氧化剂用量的增加、苯胺用量的减少、反应温度的降低和反应时间的延长而增加,制备的聚苯胺主要是翡翠亚胺型聚苯胺,并以颗粒形式存在,大小在100 nm左右,局部有团聚现象,颗粒间堆积蓬松;该聚苯胺作为超级电容器活性电极材料,具有较好的电化学电容性能,最高比电容达到178 F/g。 相似文献
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化学氧化法合成聚吡咯薄膜 总被引:6,自引:0,他引:6
通过界面氧化合成了聚吡咯薄膜。对使用的溶剂和氧化剂进行了讨论,并在不同的温度和浓度下观察聚吡咯薄膜生成的速度及生成膜的稳定性能。通过扫描电镜,红外光谱,电导测定,元素分析等实验,研究了聚合膜的组成和结构。 相似文献
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Conducting polyaniline doped with polymeric acids was synthesized by a in situ chemical polymerization method. The synthesized polymers were characterized by using UV‐Visible, FT‐IR spectroscopy and SEM analysis. Thermal stability of these polymers was evaluated by using TGA/DSC analysis. Among the three polymeric acids used for doping purpose, poly(vinyl sulphonic acid) doped polyaniline is found to be more conducting than those doped with other acids. From the temperature dependent conductivity measurements, an increase in conductivity with increase in temperature was observed. 相似文献
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Ann‐Sofie Leppnen Chunlin Xu Jun Liu Xiaoju Wang Markus Pesonen Stefan Willfr 《Macromolecular rapid communications》2013,34(13):1056-1061
A green chemoenzymatic pathway for the synthesis of conducting polyaniline (PANI) composites is presented. Laccase‐catalyzed polymerization in combination with anionic polysaccharides is used to produce polysaccharide/PANI composites, which can be processed into flexible films or coated onto cellulose surfaces. Different polysaccharide templates are assessed, including κ‐carrageenan, native spruce O‐acetyl galactoglucomannan (GGM), and TEMPO‐oxidized cellulose and GGM. The resulted conducting biocomposites derived from natural materials provide a broad range of potential applications, such as in biosensors, electronic devices, and tissue engineering.
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Dr. Marta E. Plonska‐Brzezinska Julita Mazurczyk Dr. Barbara Palys Joanna Breczko Dr. Andrzej Lapinski Dr. Alina T. Dubis Prof. Luis Echegoyen 《Chemistry (Weinheim an der Bergstrasse, Germany)》2012,18(9):2600-2608
Small multilayer fullerenes, also known as carbon nano‐onions (CNOs; 5–6 nm in diameter, 6–8 shells), show higher reactivity than other larger carbon nanostructures. Here we report the first example of an in situ polymerization of aniline on phenyleneamine‐terminated CNO surfaces. The green, protonated, conducting emeraldine polyaniline (PANI) was directly synthesized on the surface of the CNO. The functionalized and soluble CNO/PANI composites were characterized by TEM, SEM, DSC, Raman, and infrared spectroscopy. The electrochemical properties of the conducting CNO/PANI films were also investigated. In comparison with pristine CNOs, functionalized carbon nanostructures show dramatically improved solubility in protic solvents, thus enabling their easy processing for coatings, nanocomposites, and biomedical applications. 相似文献