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采用多喷头静电纺丝技术制备了复合超滤膜,该复合超滤膜是以聚对苯二甲酸乙二酯(PET)无纺布为支撑层,PET/PVA复合纳米纤维膜为分离层,再用丙酮和水的混合溶剂处理得到致密分离层.采用扫描电镜法(SEM)、红外光谱法(FTIR)对复合膜表面进行表征,测试了复合超滤膜的抗水解性能.SEM结果表明,复合膜表面的PET纳米纤维的直径为960 nm,PVA纳米纤维的直径为320 nm,用不同比例的混合溶剂对复合超滤膜进行处理会产生不同的表面形貌,最佳的比例是w(丙酮)/w(水)=30/70.抗水解性能实验结果显示比较适宜的交联剂加入量为2 wt%,用该含量对复合膜进行交联,复合膜具有较好的抗水解性能,其中重量损失率为2.12%,溶胀度为3.62%.红外光谱分析表明,交联处理后,复合膜表面的—OH量大大减少,耐水性能提高,交联前后膜表面在—C O和C—O—C处的吸收峰有很大的区别.
The composite ultrafiltration membrane was prepared by multi-jet electrospinning technology. The composite ultrafiltration membrane was made of polyethylene terephthalate (PET) non-woven fabric and PET / PVA composite nanofiber membrane as the separation layer. And then treated with a mixture of acetone and water to obtain a dense separation layer.The surface of the composite membrane was characterized by scanning electron microscopy (SEM) and infrared spectroscopy (FTIR), and the hydrolysis resistance of the composite membrane was tested. The diameter of the PET nanofibers on the surface of the composite membrane is 960 nm and the diameter of the PVA nanofibers is 320 nm. The composite ultrafiltration membranes with different proportions of mixed solvents have different surface topography, and the optimal ratio is w Acetone) / w (water) = 30 / 70. Hydrolysis resistance experimental results show that the more appropriate amount of cross-linking agent is 2 wt%, with the content of the composite membrane cross-linked, the composite membrane has good hydrolysis resistance , The weight loss rate was 2.12% and the swelling degree was 3.62% .FTIR analysis showed that the amount of -OH on the surface of the composite membrane was greatly reduced and the water resistance was improved after the crosslinking treatment. The surface of the membrane before and after cross- O-C at the absorption peak is very different.