当前位置: X-MOL 学术J. Membr. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Anion exchange membranes with clusters of alkyl ammonium group for mitigating water swelling but not ionic conductivity
Journal of Membrane Science ( IF 9.5 ) Pub Date : 2018-03-01 , DOI: 10.1016/j.memsci.2017.12.062
Md. Masem Hossain , Jianqiu Hou , Liang Wu , Qianqian Ge , Xian Liang , Abhishek N. Mondal , Tongwen Xu

Abstract Crosslinked ionomers containing clusters of alkyl ammonium group at side chain was synthesized by attaching an unique amine (tris[2-(dimethylamino)ethyl]amine) on poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) polymer backbone. These molecular structures show a dramatic enhancement in water resistance (low water uptake (9–13%) and dimensional swelling (4–6%) in water at room temperature) compared with non-cluster-shaped PPOs. Moreover, the temperature had less of an influence on the water uptake and swelling ratio of the membranes. The resulting anion exchange membranes exhibit good ionic (OH-) conductivities in water (up to 25.4 mS cm−1 at 25 °C) and represent a new class of anion exchange membranes. A test of the alkaline stability of membranes (in 1 M KOH at 60 °C for 480 h) showed hydroxide conductivity about 51% of the original conductivity and indicated that these membranes are good candidates for application in alkaline fuel cells (AFCs). Membrane electrode assembly made from the as-fabricated membrane showed moderate fuel cell performance reaching peak power density 77 mW cm−2 at 60 °C in a H2/O2 alkaline fuel cell. This simplistic synthetic tactic enables the preparation of densely functionalized materials with the potential to meet the demands of AFCs.

中文翻译:

具有烷基铵基团簇的阴离子交换膜可减轻水膨胀但不降低离子电导率

摘要 通过在聚(2,6-二甲基-1,4-苯醚)(PPO)上连接独特的胺(三[2-(二甲氨基)乙基]胺)合成了在侧链含有烷基铵基团簇的交联离聚物。聚合物骨架。与非簇状 PPO 相比,这些分子结构显示出显着增强的耐水性(低吸水率(9-13%)和室温下在水中的尺寸膨胀(4-6%))。此外,温度对膜的吸水率和溶胀率的影响较小。所得阴离子交换膜在水中表现出良好的离子 (OH-) 电导率(在 25°C 时高达 25.4 mS cm-1),代表了一类新的阴离子交换膜。膜的碱性稳定性测试(在 1 M KOH 中,60 °C 下 480 小时)显示氢氧化物电导率约为原始电导率的 51%,表明这些膜是碱性燃料电池 (AFC) 应用的良好候选者。由制造的膜制成的膜电极组件显示出中等的燃料电池性能,在 H2/O2 碱性燃料电池中,在 60°C 时达到峰值功率密度 77 mW cm-2。这种简单的合成策略能够制备具有满足 AFC 需求的潜力的高密度功能化材料。
更新日期:2018-03-01
down
wechat
bug