论文摘要
本论文作者在超声辐照条件下,通过化学氧化聚合,制备了盐酸(HCl)掺杂聚苯胺(PANI)纳米棒、十二烷基苯磺酸(DBSA)掺杂聚苯胺和HCl掺杂聚苯胺/纳米二氧化钛(TiO2)复合材料。采用FTIR, UV-vis光谱, SEM, XRD,四电极电导率仪和电化学工作站对材料的结构与性能进行研究。超声辐照下,应用溶液聚合法得到的HCl掺杂PANI纳米棒具有较高的掺杂程度和质子化程度;由于形成了纳米棒,HCl掺杂PANI的大分子具有较高的结构规整度,导致该材料的室温电导率、热稳定性提高。超声辐照下制备的HCl掺杂PANI纳米棒具有较好的电容行为、较高的电化学性能和电致变色性。超声辐照下,应用乳液聚合法制备的DBSA掺杂PANI的颗粒小且尺寸分布均匀;超声辐照对DBSA掺杂PANI化学结构、热稳定性和室温电导率的影响不大。DBSA掺杂PANI具有电容特性和电致变色性,当DBSA与ANI摩尔比一定时,机械搅拌下乳液聚合得到的DBSA掺杂PANI的电化学性能较好。超声辐照下,应用化学氧化溶液原位聚合法,制备了HCl掺杂PANI/TiO2复合材料。此种复合材料具有良好的紫外吸收特性和热稳定性。但是,纳米TiO2附着在PANI纳米棒表面,阻碍了PANI纳米棒的形成,并使复合材料中PANI大分子的结构规整度下降、从而导致其室温电导率和电化学活性下降。
论文目录
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