Abstract Sulfonate zwitterionic ionic liquids with methyl-imidazolium (mim.ZIL) or triphenylphosphonium (PPh3.ZIL) as the cations were mixed with dodecylbenzenesulfonic acid (DBSA) and used as co-doping agent for the synthesis of polyaniline (PANI) by inverted emulsion polymerization approach in toluene medium. The ZIL-DBSA combination resulted in PANI with higher DC conductivity (σDC) values and the better response was obtained with mim.ZIL/DBSA in a molar ratio of 1.0, with σDC corresponding to around 8 S cm−1. The presence of cetyl trimethylammonium bromide (CTAB) during the synthesis caused an additional improvement of the conductivity, reaching values as high as 16.3 and 14.0 for PANI prepared in the presence of mim.ZIL and PPh3.ZIL, respectively. Electromagnetic interference shielding effectiveness (EMI SE) of PANI samples prepared with different conditions was also investigated in the X-band frequency range. An improved EMI SE, with electromagnetic attenuation of -55 dB was observed for PANI sample prepared in the presence of CTAB and mim.ZIL/DBSA in a molar ratio of 1.0.

中文翻译：

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十二烷基苯磺酸共掺杂聚苯胺与反相乳液聚合制备的两性离子型离子液体

摘要 以甲基咪唑鎓（mim.ZIL）或三苯基鏻（PPh3.ZIL）为阳离子的磺酸盐两性离子液体与十二烷基苯磺酸（DBSA）混合，作为共掺杂剂用于反相乳液合成聚苯胺（PANI）甲苯介质中的聚合方法。ZIL-DBSA 组合导致 PANI 具有更高的 DC 电导率 (σDC) 值，并且使用摩尔比为 1.0 的 mim.ZIL/DBSA 获得更好的响应，σDC 对应于大约 8 S cm-1。在合成过程中十六烷基三甲基溴化铵 (CTAB) 的存在进一步提高了电导率，分别在 mim.ZIL 和 PPh3.ZIL 存在下制备的 PANI 达到了高达 16.3 和 14.0 的值。还在 X 波段频率范围内研究了在不同条件下制备的 PANI 样品的电磁干扰屏蔽效率 (EMI SE)。对于在摩尔比为 1.0 的 CTAB 和 mim.ZIL/DBSA 存在下制备的 PANI 样品，观察到改进的 EMI SE，电磁衰减为 -55 dB。