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中文摘要：
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.
英文摘要：
A composite ultrafiltration membrane containing poly（ethylene terephthalate）（PET） non-woven fabric substrate and a PET / PVA composite nanobrous barrier layer based on electrospinning technology and solvent treatment was demonstrated.And this solvent is a mixture of different ratios of acetone and water.The chemical structures of the ultrafiltration membranes surface were characterized in detail by Fourier transform infrared（FTIR） spectroscopy,and surface morphology changes of the top barrier layer after solvent treatment were observed by scanning electron micrograph（SEM）.Besides,the influence of the glutaraldehyde（GA） concentration on the hydrolytic resistance of ultrafiltration membrane was also studied.Results reveal that the surface of membranes shows different morphology under the mixed solvent with different ratios of acetone and water,and the optimum proportion of acetone and water was 30 /70（by weight）;The average diameters of the PET fibers and PVA fibers were about 960 nm and 320 nm,respectively.The optimal hydrolytic resistance（weight loss ratio 2.12% and swelling ratio 3.62%） can be obtained when the dosages of crosslinker was 2 wt%.In addition,the result of FTIR indicated that the hydraxyl amount decreased and the groups such as —C O,C—O—C were introduced to the surface of composite ultrafiltration membrane by cross-linking between PVA and GA.
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