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采用计算机直接试验设计法(Random-Design)设计聚偏氟乙烯(polyvinylidene fluoride,PVDF)/聚甲基丙烯酸甲酯(polymethyl methaerylate,PMMA)合金膜相转化法制膜工艺方案,再通过 Statistical Analysis System(SAS)软件对实验数据进行统计分析,得到用于表征膜选择性和渗透性的膜表面平均孔径和膜水通量的最优坷归模型方程。实验结果表明,该模型与实际情况较为吻合。通过该模型来优化制膜工艺,可使膜的渗透通量提高95%,膜表面平均孔径从0.40μm 减少至0.2μm,实现膜的选择性与渗透性同时提高。
The film-forming process of polyvinylidene fluoride (PVDF) / polymethyl methaerylate (PMMA) alloy was studied by computer-aided design method, SAS) software for statistical analysis of the experimental data obtained for the membrane selectivity and permeability of the membrane surface average pore size and membrane water flux of the optimal rough regression model equation. The experimental results show that the model is in good agreement with the actual situation. Through the model to optimize the film-forming process, the permeation flux of the membrane can be increased by 95%, the average pore diameter of the membrane surface can be reduced from 0.40μm to 0.2μm, and the selectivity and permeability of the membrane can be improved at the same time.