膜科学与技术

颗粒溶胶路线制备高通量γ-Al2O3纳滤膜

作者：陈献富，张伟，范益群

单位：南京工业大学化学化工学院, 材料化学工程国家重点实验室, 南京 210009

关键词：纳滤; 陶瓷膜; 溶胶-凝胶; γ-Al2O3

出版年,卷(期):页码： 2014,34(3):48-52

摘要：

颗粒溶胶路线制备陶瓷膜是一种不使用有机溶剂的清洁工艺. 以仲丁醇铝为前驱体, 采用水作溶剂, 调节pH 为3-4, 通过颗粒溶胶路线制备了平均粒径为16 nm稳定的勃姆石溶胶. 通过浸浆法, 在α-Al2O3微滤底膜上制备γ-Al2O3纳滤膜, 并考察了热处理过程及涂膜时间的影响. 控制涂膜时间为60 s,烧结温度为600 ℃, 所制备的γ-Al2O3纳滤膜膜层厚度约为1.8 μm, 对PEG的截留分子量约1000Da, 计算孔径为1.6nm,其纯水通量约为20 L·m-2·h-1·bar-1. 采用颗粒溶胶路线适合制备γ-Al2O3纳滤膜.

Colloidal route is an environmental benign process for the preparation of ceramic membranes without using organic solvent. A stable colloidal boehmite sol with an average particle size of 16 nm was prepared from aluminum tri-sec-butoxide by using H2Oas solvent in the pH value of 3-4. The stable sol was used to fabricateγ-Al2O3 NF membranes on α-Al2O3 MF substrates through a dip-coating approach. The effects of calcination temperature and dipping time were investigated. As the dipping time was 60 s and the calcination temperature was 600 ℃, γ-Al2O3 NF membranes with an average membrane thickness of 1.8 μm were obtained. The MWCO of γ-Al2O3 NF membranes, obtained by filtration of an aqueous PEG solution, was about 1000 Da, which corresponds to an average pore size of ca. 1.6 nm. Meanwhile, the NF membranes showed relative high pure water flux (~20 L m-2h-1bar-1). Colloidal route is suitable for the preparation of γ-Al2O3 NF membrane.

陈献富(1989-), 男, 江苏省淮安市人, 硕士, 从事膜分离材料的研究与应用. *通讯联系人

参考文献：

Colloidal route is an environmentally benign process for the preparation of ceramic membranes without using organic solvent. A stable colloidal boehmite sol with an average particle size of 16 nm was prepared from aluminum tri-sec-butoxide by using H2O as solvent in the pH value of 3-4. The stable sol was used to fabricate γ-Al2O3 NF membranes on α-Al2O3 MF substrates through a dip-coating approach. The effects of calcination temperature and dipping time were investigated. As the dipping time was 60 s and the calcination temperature was 600 oC, γ-Al2O3 NF membranes with an average membrane thickness of 1.8 μm were obtained. The MWCO of γ-Al2O3 NF membranes, obtained by filtration of an aqueous PEG solution, was about 1000 Da, corresponding to an average pore size of ca. 1.6 nm. Meanwhile, the NF membranes showed relative high pure water flux (~20 L m-2h-1bar-1). Colloidal route is suitable for the preparation of γ-Al2O3 NF membrane

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