Singh Asheesh, Banerjee Susanta
Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
ACS Omega. 2018 Aug 21;3(8):9620-9629. doi: 10.1021/acsomega.8b01363. eCollection 2018 Aug 31.
This article describes the synthesis and characterization of highly sulfonated polytriazole copolymers (PTSQSH-I to IV) with IEC values ranging from 2.41 to 3.49 mequiv g. The copolymers were synthesized by click reaction between equimolar amount of a dialkyne monomer, potassium 2,5-bis(2-propyn-1-yloxy)benzenesulfonate, and a mixture of two different diazide monomers, 4,4-bis[3'-trifluoromethyl-4'(4-azidobenzoxy)benzyl]biphenyl and 4,4'-diazido-2,2'-stilbene disulfonic acid disodium salt. The copolymers were characterized by Fourier transform infrared and NMR spectroscopy techniques. The membranes were prepared by dissolving the salt form of the copolymers in dimethyl sulfoxide. The copolymers showed high thermal, mechanical, and oxidative stabilities, and the acidified membranes showed very high proton conductivity (43-173 and 132-304 mS cm at 30 and 80 °C, respectively). Transmission electron microscopy images confirmed the formation of well-phase-separated morphology with interconnected hydrophilic domains (20-150 nm).
本文描述了离子交换容量（IEC）值范围为2.41至3.49 mequiv g的高度磺化聚三唑共聚物（PTSQSH-I至IV）的合成与表征。这些共聚物是通过等摩尔量的二炔单体2,5-双（2-丙炔-1-基氧基）苯磺酸钾与两种不同的二叠氮单体4,4-双[3'-三氟甲基-4'（4-叠氮基苄氧基）苄基]联苯和4,4'-二叠氮基-2,2'-二苯乙烯二磺酸钠的混合物之间的点击反应合成的。通过傅里叶变换红外光谱和核磁共振光谱技术对共聚物进行了表征。通过将共聚物的盐形式溶解在二甲基亚砜中来制备膜。共聚物表现出高热稳定性、机械稳定性和氧化稳定性，酸化后的膜表现出非常高的质子传导率（在30和80°C时分别为43 - 173和132 - 304 mS cm）。透射电子显微镜图像证实形成了具有相互连接的亲水区域（20 - 150 nm）的良好相分离形态。
