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PVDF/PZT混合基质膜的制备及在膜生物反应器中的应用

作者：孟庆伟，周玥，曹鹏，汪朝晖，刘飞，崔朝亮

单位： 1. 江苏环保产业技术研究院股份公司，江苏南京 210019；2. 南京工业大学，化工学院，材料化学工程国家重点实验室，江苏南京 211816；3. 南京工业大学，国家特种分离膜工程技术研究中心，江苏南京 211816

关键词：锆钛酸铅；混合基质膜；膜生物反应器；压电膜；膜污染

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2023,43(4):60-68

摘要：

利用热致相分离（TIPS）法，以乙酰基柠檬酸三丁酯（ATBC）为稀释剂，1-丁基-3-甲基咪唑（[BMIM][PF6]）离子液体、锆钛酸铅（PZT）为添加剂，制备聚偏氟乙烯（PVDF）/PZT混合基质膜。通过研究混合基质膜的微观结构、熔点、结晶度、压电性能等结果，考察PZT掺杂含量对PVDF/PZT混合基质膜结构和性能的影响。结果表明：当PZT质量浓度达到4 wt%时，混合基质膜的微观结构由球晶状与致密结构共同组成，致密状会导致水通量的下降。当PZT浓度为3 wt%时，其孔隙率为51.4%，纯水通量是333.8 L/m2·h，机械性能较好，拉伸强度为3.53 MPa。通过高压极化，混合基质膜获得比PVDF膜更高的压电特性，用于压电膜生物反应器（MBR）时，混合基质膜的抗污染性能增加，通量较原膜提高了36.3%。

Polyvinylidene fluoride (PVDF) blend membrane was prepared by thermally induced phase separation (TIPS) method with acetyl-tributyl citrate (ATBC) as diluent, 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) and lead zirconate titanate (PZT) as additives. The effect of PZT doping content on the structure and properties of PVDF/PZT blend membrane was investigated by studying the microstructure, melting point, crystallinity and piezoelectric properties of the blends. The results demonstrated that the microstructure of the blend membrane with 4 wt% PZT consisted of spherulite and dense structures, and the dense structure led to the decrease of water flux. When the PZT concentration was 3 wt%, the porosity was 51.4%, the pure water flux was 333.8 L/m2·h, and the tensile stress was 3.53 MPa. Through high voltage polarization, the mixed matrix membranes(MMM) obtained higher piezoelectric characteristics than the PVDF membrane. When used in piezoelectric membrane bioreactor (MBR), the anti-fouling performance of the mixed matrix membrane was improved, and the flux was increased by 36.3%.

基金项目：

江苏省优秀青年基金（BK20200091），国家自然科学基金（22078146）

作者简介：

孟庆伟（1991，07），男，河南南阳，硕士，工程师，环境保护，E-mail：mengqw91@163.com

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