等离子体技术接枝苯磺酸甜菜碱改性对离子交换膜电阻的影响

Effect of Plasma-grafted SBMA Modification on Resistance of Ion Exchange Membrane

采用等离子体技术,利用两性物质苯磺酸甜菜碱(SBMA)作为接枝单体,对苯乙烯-聚氯乙烯为基体的离子交换合金膜进行改性研究,以膜电阻为主要考量技术指标,借助电化学工作站、扫描电镜技术(SeM)、红外光谱分析技术(FTIR)等探究最佳改性条件。结果表明:SBMA质量分数为5%、等离子体照射强度为0.75W/cm2、照射时长为10min条件下改性效果最佳。改性后膜面致密平整,膜电阻降到3Ω以下。

Ion exchange alloy films based on styrene-polyvinyl chloride ( PVC) were modified by plasma technology using betaine benzene sulfonate ( SBMA) as grafting monomer. The optimum modification conditions were investigated by means of electrochemical workstation,scanning electron microscopy ( SEM) and infrared spectroscopy ( FTIR). The results showed that the modification effect was the best when the mass fraction of SBMA was 5%,the plasma irradiation intensity was 0.75 W/cm2 and the irradiation time was 10 min. After modification,the film surface was compact and smooth,and the resistance of the film was reduced to less than 3 Ω.