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化工学报  2015 

Ti/Zr复合纳滤膜的制备及其性能

DOI: 10.11949/j.issn.0438-1157.20141645, PP. 1600-1606

Keywords: 陶瓷纳滤膜,Ti/Zr复合,离子截留,溶胶-凝胶法

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Abstract:

通过聚合溶胶路线制备出稳定的Ti/Zr(摩尔比=1:1)复合溶胶。采用浸浆法,在平均孔径为5~6nm的片状a-Al2O3/g-Al2O3载体上制备出完整无缺陷的Ti/Zr复合纳滤膜。详细考察了焙烧温度对Ti/Zr粉体的影响,并考察了Ti/Zr复合纳滤膜的性能。结果表明:在较高烧成温度下(500℃),Ti/Zr粉体依然呈无定形态且保持微孔结构。在400℃烧成温度下制备出孔径为1.49nm的Ti/Zr复合纳滤膜,该膜的截留分子量(MWCO)为880,纯水通量为4.3L·m-2·h-1·MPa-1。在pH=6,压力0.8MPa的条件下,该膜对0.005mol·L-1的MgCl2、CaCl2的截留率分别为85%和78%。

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