膜科学与技术

APTES改性的SiO2/PAN杂化膜的制备及其超滤性能研究

作者：刘峤，李琳，王春雷，金鑫，徐瑞松，王同华

单位：（大连理工大学化工学院精细化工国家重点实验室膜科学与技术研究开发中心，大连 116024）

关键词：聚丙烯腈；杂化膜；SiO2；APTES；原位合成

出版年,卷(期):页码： 2017,37(2):1-5

摘要：

以聚丙烯腈（PAN）为基体，N,N-二甲基乙酰胺为溶剂，正硅酸乙酯（TEOS）为无机前体，3-氨丙基三乙氧基硅烷（APTES）为添加剂，原位合成了SiO2/PAN杂化膜。借助于扫描电镜、红外光谱、接触角和渗透性能试验等测试手段，研究了APTES对SiO2/PAN杂化膜的微观形貌、化学结构、亲水性及渗透性能的影响。结果表明，原位合成法制备SiO2/PAN杂化膜的过程中，APTES使 SiO2表面拥有一定量的-NH2官能团，提高了SiO2与PAN的相容性，使其在PAN基体中分散得更均匀，不但使膜具有更薄的皮层和尺寸更大的垂直指状孔结构，还进一步提高了膜表面的亲水性、水通量和抗污染性能，其中，APTES添加量为12%的(T/A12)/PAN膜的纯水接触角最小，纯水通量为260.43 L/m2•h，且对BSA的截留率保持在99%以上。

The SiO2/PAN hybrid membranes were fabricated in situ by the method of non-solvent induced phase separation (NIPS) with polyacrylonitrile (PAN) as the matrix, N,N-dimethylacetamide (DMAc) as the solvent, tetraethoxysilane (TEOS) as the inorganic precursor and 3-aminopropyltriethoxysilane (APTES) as the additive. The effects of APTES on the micromorphology, chemical structure, hydrophilic property and filtration performance of SiO2/PAN hybrid membranes were investigated by the SEM, FT-IR, contact angle measurement and ultrafiltration performance test. The results indicated that the –NH2 groups were grafted on the surface of SiO2 due to the modification of APTES, which promoted dispersion of SiO2 in the PAN matrix. Therefore, the hybrid membranes not only have a thinner surface layer and the vertical finger-like holes, but also improved the hydrophilic property and anti-fouling performance of the membranes. (T/A12)/PAN with APTES content of 12% exhibited the lowest contact angle and the pure water flux of 260.43 L/m2•h with the BSA rejection as high as 99%.

作者简介：刘峤（1987-），男，安徽淮南，博士研究生，从事分离膜材料的研究及应用。E-mail：peakliu0525@163.com

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