聚偏氟乙烯/聚氯乙烯/聚甲基丙烯酸甲酯共混多孔中空纤维膜的制备与性能测试

采用干-湿法纺丝工艺,制备聚偏氟乙烯/聚氯乙烯/聚甲基丙烯酸甲酯共混五孔中空纤维膜,分别以聚乙烯吡咯烷酮(PVP)、聚乙二醇1000(PEG1000)和吐温-80为添加剂,改善成膜性能。通过水通量超滤试验、牛血清白蛋白截留试验、拉伸试验以及扫描电子显微镜表征膜的截面分析得出,铸膜液中溶质的质量分数为17%,添加6%PVP时制备的膜综合性能最佳。试验制得的中空纤维膜最大水通量为515.42L/(m2·h),截留率为87.25%。

Preparation of PVDF/FVC/PMMA blend porous hollow fiber membrane and performance testing thereof

By using a dry-jet wet spinning process, PVDF/FVC/PMMA blend fivehole hollow fiber membrane was prepared, and its performance was improved with PVP, PEG-1000, and Tween-80 as additive respectively. According to the analysis of the results of water flux ultrafiltration test, bovine serum albumin retention test, tensile test and the cross-section characterized by SEM, the membrane prepared with casting solution whose solute mass fraction was 17% and with 6% of PVP added was concluded to have the best integrated performance. The maximum water flux and retention ratio of the said hollow fiber membrane were 515.42 L/(m2·h) and 87.25% respectively.