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首页> 外文期刊>Reactive & Functional Polymers >Preparation and properties of ZrPA doped CMPSU cross-linked PBI based high temperature and low humidity proton exchange membranes
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Preparation and properties of ZrPA doped CMPSU cross-linked PBI based high temperature and low humidity proton exchange membranes

机译：ZrPA掺杂的CMPSU交联PBI基高温低湿质子交换膜的制备及性能

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摘要

Poly[4,4'-(diphenyl ether)-5,5'-bibenzimidazole] (oPBI) based high temperature proton exchange membranes are prepared by covalent cross-linking with chloromethylated polysulfone (CMPSU) and doping with zirconium phytate (ZrPA). ZrPA is synthesized as the proton conductor through a facile method from zirconyl chloride and phytic acid which is abundant and readily available. oPBI is cross-linked by CMPSU and that hydrogen bonds are formed between ZrPA and oPBI-CMPSU. The composite membranes are dense without through holes when doping with ZrPA. The composite membranes exhibit good thermal stability below 140 degrees C. Meanwhile, the composite membranes reveal good mechanical strength and methanol resistance. The oxidative stability is improved because of cross-linking and the doping of ZrPA. Conductivities of oPBI-CMPSU/ZrPA at different temperatures and relative humidity (RH) are investigated. At 100% RH, 50% RH and 0 RH, the conductivity of oPBI-CMPSU(20%)/ZrPA(30%) can reach 0.072 S/cm, 0.025 S/cm and 0.012 S/cm at 140 degrees C, respectively. Although the proton conductivity of the composite membrane was not particularly high at 100% RH, the composite membrane comparatively exhibited good proton conductivity at high temperature and at 50% RH and 0 RH.
机译：聚[4,4'-（二苯醚）-5,5'-联苯并咪唑]（oPBI）基高温质子交换膜是通过与氯甲基化聚砜（CMPSU）共价交联并掺杂植酸锆（ZrPA）制备的。 ZrPA是通过一种简便的方法从锆酰氯和植酸中合成的，作为质子导体，其含量丰富且易于获得。 oPBI通过CMPSU交联，并且ZrPA和oPBI-CMPSU之间形成氢键。掺杂ZrPA时，复合膜致密，无通孔。该复合膜在140℃以下显示出良好的热稳定性。同时，该复合膜显示出良好的机械强度和耐甲醇性。由于交联和ZrPA的掺杂，提高了氧化稳定性。研究了oPBI-CMPSU / ZrPA在不同温度和相对湿度（RH）下的电导率。在100％RH，50％RH和0 RH的条件下，oPBI-CMPSU（20％）/ ZrPA（30％）的电导率在140摄氏度下分别可以达到0.072 S / cm，0.025 S / cm和0.012 S / cm 。尽管复合膜的质子传导率在100％RH下不是特别高，但是复合膜在高温下以及在50％RH和0RH下相对表现出良好的质子传导率。

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