Zhao Yibo, Arowo Moses, Wu Wei, Chen Jianfeng
†State Key Laboratory of Organic-Inorganic Composites and ‡Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
Langmuir. 2015 May 12;31(18):5155-63. doi: 10.1021/la504996c. Epub 2015 Apr 27.
Polyaniline (PANI) nanofibers with improved properties were prepared by high gravity chemical oxidative polymerization in a rotating packed bed with the assistance of p-aminodiphenylamine (AD) and p-phenylenediamine (AP). The effects of reactor type, additive dosage, reaction temperature, and high-gravity level on the properties of products were investigated in detail. Three conclusions were made: (1) a small amount of additive can significantly improve some properties of the nanofibers such as uniformity, specific surface area, and specific capacitance; (2) in order to obtain high-quality nanofibers, the high-gravity level should coordinate with the reaction rate; (3) the molecular weight and conductivity of PANI decrease with the increase of additive dosage. The products have larger specific surface areas of up to 73.9 and 68.4 m(2)/g and consequently improved specific capacitance of up to 527.5 and 552 F/g for the PANI nanofibers prepared with AD and AP, respectively. However, the specific surface area and specific capacitance of pure PANI are only 49.1 m(2)/g and 333.3 F/g, respectively. This research provides a simple, reliable, and scalable method to produce PANI nanofibers of high performances.
在对氨基二苯胺（AD）和对苯二胺（AP）的辅助下，通过旋转填充床中的高重力化学氧化聚合制备了性能得到改善的聚苯胺（PANI）纳米纤维。详细研究了反应器类型、添加剂用量、反应温度和高重力水平对产物性能的影响。得出了三个结论：（1）少量添加剂可显著改善纳米纤维的一些性能，如均匀性、比表面积和比电容；（2）为了获得高质量的纳米纤维，高重力水平应与反应速率相协调；（3）PANI的分子量和电导率随添加剂用量的增加而降低。对于用AD和AP制备的PANI纳米纤维，产物具有高达73.9和68.4 m²/g的更大比表面积，因此比电容分别提高到527.5和552 F/g。然而，纯PANI的比表面积和比电容分别仅为49.1 m²/g和333.3 F/g。本研究提供了一种简单、可靠且可扩展的方法来生产高性能的PANI纳米纤维。
