TiO2改性静电纺复合超滤膜抗污染性能的研究
作者:李洪春,王娇娜,李从举
单位: 北京服装学院材料科学与工程学院,北京 100029 ;2. 北京市服装材料研究开发与评价重点实验室,北京 100029
关键词: 静电纺;超滤;抗污染;TiO2
分类号: TQ028.8
出版年,卷(期):页码: 2015,35(2):30-35

摘要:
膜污染是制约超滤膜广泛使用的最重要因素之一,膜污染直接影响到膜的使用寿命及膜的分离性能。本文采用静电纺丝技术制备了PET/PVA纳米纤维复合超滤膜,通过溶剂浸泡处理复合膜,将PVA纳米纤维层溶胀并交联,形成具有抗污染性能的PVA表面致密层结构,所制备的复合纳米纤维超滤膜具有水通量损失率小、通量恢复率高的优点。通过在PVA中添加不同质量分数的纳米TiO2进一步改善膜的亲水性和抗污染性能。使用死端过滤系统过滤10 ppm腐殖酸溶液,测试结果表明:复合膜的分离性能和抗污染性能在一定范围内随着TiO2的增加而增大。亲水性TiO2的添加能够进一步增强PVA的亲水性,对复合膜抗污染性能的提高有重要作用。 但是,TiO2的添加也会增大膜表面的粗糙度,不利于膜抗污染性能的提高,因此,TiO2有一个合宜的添加限度。
 Membrane fouling is one of the most important challenges faced in ultrafiltration (UF) operations . In this study , a three layers composite ultrafiltration membrane contains titanium dioxide(TiO2) was prepared by electrostatic spinning technology . Hydrophilic nano TiO2 was added in PVA by doping technology . Finally through the mixed solvent for processing , the high flux , high rejection ratio composite electrospinning ultrafiltration membrane with good antifouling property was made .

基金项目:
北京市属高校创新能力提升计划项目(no. TJSHG201310012021);国家自然科学基金项目(grant no. 21274006);国家973项目(grant no. 2010CB933501);北京市优秀人才培养资助(编号:2013D005001000003),北京服装学院科学研究青年创新基金(2014AL-21), 北京服装学院创新团队与优秀人才选拔与培养计划项目。

作者简介:
李洪春(1987-),男,山东潍坊人,硕士研究生,从事静电纺丝纳米纤维超/微滤膜方面研究,

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