Abstract A new diamine monomer namely 4,4′-((2′,5′-bis(benzyloxy)-3,3′'-bis(trifluoromethyl)-[1,1′:4,4′'-terphenyl]-4,4′'-diyl)bis(oxy))dianiline (TADBE) was prepared. A series of sulfonated co-poly(ether imide)s was synthesized using this diamine as one of the co-monomers along with 4,4′-diaminostilbene-2,2′-disulfonic acid (DSDSA) on reaction with a six-membered dianhydride, 1,4,5,8-naphthalene tetracarboxylic dianhydride (NTDA). The degree of sulfonation (DS, 60-90) of the copolymers was controlled by varying the feed ratio of TADBE/DSDSA and the obtained copolymers were designated as DBN-XX (XX = 60, 70, 80 and 90, which signifies the DSDSA feed percentage). The copolymer structures and compositions were confirmed by NMR and FTIR analysis. Membranes were prepared through solution casting route using dimethyl sulfoxide as solvent followed by high-temperature annealing. The membranes showed high thermal (e.g., DBN-60, Td10 ∼327 °C) and mechanical stabilities (e.g., DBN-60, tensile strength ∼94 MPa), good hydrolytic stability (e.g., DBN-60, >99 retain wt%) and low water uptake (e.g., DBN-60, ∼17 wt% at 80 °C). Polymer composites were prepared by loading different weight percentages of cerium oxide (2.5, 5 and 7.5 wt%, respectively) to enhance the peroxide stability of the copolymer DBN-90 with high DS value. TEM and AFM studies of the pristine membranes confirmed a well phase separated morphology and this was further supported from SAXS profiles. The proton conductivity (e.g., DBN-90, ∼244 mS cm−1) and microbial fuel cell performance (e.g., DBN-90, power density ∼576 mW m−2) of the membranes were comparable to Nafion® 117 (power density ∼563 mW m−2) under similar experimental conditions.

中文翻译：

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含有新型磺化共聚（醚酰亚胺）的三氟甲基和苄基醚侧基：在微生物燃料电池中的应用

摘要 一种新型二胺单体即4,4'-((2',5'-双(苄氧基)-3,3''-双(三氟甲基)-[1,1':4,4''-三联苯]-制备了 4,4''-二基）双（氧基））二苯胺（TADBE）。使用该二胺作为共聚单体之一以及 4,4'-二氨基二苯乙烯-2,2'-二磺酸 (DSDSA) 与六元反应合成了一系列磺化共聚（醚酰亚胺）。二酐，1,4,5,8-萘四甲酸二酐 (NTDA)。通过改变TADBE/DSDSA的进料比来控制共聚物的磺化度（DS，60-90），所得共聚物命名为DBN-XX（XX = 60、70、80和90，表示DSDSA进料百分比）。通过NMR和FTIR分析确认共聚物的结构和组成。以二甲基亚砜为溶剂，通过溶液浇铸工艺制备膜，然后进行高温退火。膜显示出高热稳定性（例如 DBN-60，Td10 ∼327 °C）和机械稳定性（例如 DBN-60，拉伸强度约 94 MPa），良好的水解稳定性（例如 DBN-60，>99 ) 和低吸水率（例如，DBN-60，80 °C 时约 17 wt%）。通过负载不同重量百分比的氧化铈（分别为 2.5、5 和 7.5 wt%）制备聚合物复合材料，以提高具有高 DS 值的共聚物 DBN-90 的过氧化物稳定性。原始膜的 TEM 和 AFM 研究证实了良好的相分离形态，这得到了 SAXS 剖面的进一步支持。质子电导率（例如，DBN-90，~244 mS cm-1）和微生物燃料电池性能（例如，DBN-90，