Extent of incorporation of hydrolysis products in polyaniline films deposited by cyclic potential sweep
Extent of incorporation of hydrolysis products in polyaniline films deposited by cyclic potential sweep
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DOI：
10.1016/0013-4686(93)80076-c
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发表时间：
1993-07
影响因子：
6.6
通讯作者：
C. Q. Cui;L. Ong;T. Tan;J. Lee
中科院分区：
文献类型：
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作者：
C. Q. Cui;L. Ong;T. Tan;J. Lee
在聚苯胺（PANi）的循环电位扫描（CPS）沉积伏安图中，第2个0.52 V的阳极电流峰与第1个0.17 V的阳极电流峰的比值（Ip,B/Ip，A）用来衡量电聚合过程中聚合物水解降解产物的掺入程度。在hclo4溶液中沉积CPS时，该比值取决于扫描速率、电极旋转速度、沉积循环次数和苯胺浓度等沉积条件。苯胺与水的竞争反应与中间体聚苯胺氧化生成双极性态，以及生成产物的溶解度，决定了水解产物在聚合物沉积中的掺入量。聚苯胺中水解产物的存在抑制了纤维的生长，并产生了粉状膜的形态。ratioIp。因此，在实际应用中，B/Ip作为薄膜质量的指标是有用的。
The ratio of the second anodic current peak at 0.52 V to the first anodic current peak at 0.17 V,Ip,B/Ip,A, in the voltammogram of cyclic potential sweep (CPS) deposition of polyaniline (PANi) is used to measure the extent of incorporation of products of polymer degradation by hydrolysis during electro-polymerization. In CPS deposition from HClO4solutions, the ratio depends on such depositon conditions as the scan rate, the rotation speed of the electrode, the number of deposition cycles and the aniline concentration. The competitive reaction of aniline and water with an intermediate generated by PANi oxidation to the bipolaronic state, and the solubility of the resulting products, determine the amount of hydrolysis products to be incorporated in the polymer deposit. The presence of hydrolysis products in PANi inhibits fibrous growth and gives rise to a powdery film morphology. The ratioIp.B/Ip,Ais therefore useful as an index of film quality in practical applications.