预辐射接枝法制备FEP-g-PSSA/AA膜

FEP-g-PSSA/AA membranes prepared by preirradiation graft copolymerization with ^(60)Coγ-rays

采用γ射线预辐射接枝方法制备了FEP?g?PSSA/AA膜,反应制得的接枝膜是一种含氟磺酸型质子交换膜。系统研究了影响接枝反应的阻聚剂用量、膜的厚度、单体摩尔比及总摩尔浓度变化等因素。结果表明,丙烯酸(Acrylicacid,AA)与苯乙烯磺酸钠(Sodiumstyrenesulfonate,SSS)对全氟乙丙烯(Polytetrafluoroethylene-co-hexafluoropropylene,FEP)的接枝率几乎不受膜厚度变化的影响,而且全氟乙丙烯(FEP)辐照后放置三个月再进行接枝反应,接枝率也几乎没有变化。

Polytetrafluoroethylene-co-hexafluoropropylene （FEP） films were irradiated in N2 with ^60Co γ-rays, and graft-copolymerization reaction was conducted after the irradiation with a hi-monomer system of acrylic acid （AA） and sodium styrene sulfonate （SSS） to prepare FEP-g-PSSA/AA membranes, which can be used as fluoro-sulphonic proton exchange membrane. Effects of the reaction conditions on grafting yield were studied in detail, such as the Cu （CH3COO）2inhibitor concentration, the film thickness, mol ratio and total concentration of the monomers solution. The results showed that the grafting yields did not change with thickness of the FEP film samples, and with FEP films that had been kept under -5 ℃ after the irradiation for over three months.