聚偏氟乙烯管式超滤干膜制备方法研究

发布时间：2018-03-02 00:36

本文关键词： 聚偏氟乙烯管式超滤膜 SDS 干态处理干膜　出处：《膜科学与技术》2017年03期 　论文类型：期刊论文

【摘要】：采用十二烷基硫酸钠(SDS)干态处理方法,制备出聚偏氟乙烯(PVDF)管式超滤干膜.考察了SDS浓度、浸泡时间、干燥温度对PVDF管式超滤干膜的纯水通量、蛋白截留率、接触角和机械性能的影响.结果表明:随着SDS浓度的增加,PVDF管式超滤干膜纯水通量均有不同程度的增加,接触角也不断降低,而蛋白截留率则略低于原始膜蛋白截留率,在SDS质量分数为0.20%时,膜性能达到最佳;当浸泡不同时间时,干膜复水后的纯水通量、蛋白截留率均存在较大波动,在浸泡2d时达到峰值;随着干燥温度的升高,干膜纯水通量和蛋白截留率呈现降低的趋势.同时考察了干膜制备完成前后机械性能的变化.测试表明,干膜的机械性能较原膜并无明显的影响.
[Abstract]:Polyvinylidene fluoride (PVDF) tubular ultrafiltration membrane was prepared by dry treatment of 12 alkyl sodium sulfate. The concentration of SDS, soaking time and drying temperature on pure water flux and protein rejection rate of PVDF tube ultrafiltration dry membrane were investigated. The results showed that with the increase of SDS concentration, the pure water flux of the tubular ultrafiltration membrane increased, and the contact angle decreased, while the protein rejection rate was slightly lower than that of the original membrane protein. When the mass fraction of SDS was 0.20, the membrane performance reached the best. When the dry membrane was soaked for different time, the pure water flux and protein rejection rate of the dry membrane after rehydration fluctuated greatly, and reached the peak value at the second day of soaking, and with the increase of drying temperature, The pure water flux and protein rejection rate of the dry membrane showed a decreasing trend. The mechanical properties of the dry membrane before and after the preparation of the dry membrane were investigated. The results showed that the mechanical properties of the dry membrane were not significantly affected compared with the original membrane.
【作者单位】：江苏凯米膜科技股份有限公司;
【分类号】：TQ051.893

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