Fabrication and properties of Ti/Zr composite nanofiltration membrane

doi:10.11949/j.issn.0438-1157.20141645

CIESC Journal ›› 2015, Vol. 66 ›› Issue (4): 1600-1606.DOI: 10.11949/j.issn.0438-1157.20141645

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Fabrication and properties of Ti/Zr composite nanofiltration membrane

ZHU Guizhi, GUO Honglin, JIANG Qian, QI Hong

Membrane Science and Technology Research Center, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China

Received:2014-11-03 Revised:2015-01-13 Online:2015-04-05 Published:2015-04-05
Supported by:
supported by the National Natural Science Foundation of China (21276123), the National High Technology Research and Development Program of China (2012AA03A606), the "Summit of the Six Top Talents" Program of Jiangsu Province and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

Ti/Zr复合纳滤膜的制备及其性能

朱瓌之, 郭红林, 姜迁, 漆虹

南京工业大学膜科学技术研究所, 材料化学工程国家重点实验室, 江苏南京 210009

通讯作者: 漆虹
作者简介:朱瓌之(1988-),男,硕士研究生。
基金资助:
国家自然科学基金项目(21276123);国家高技术研究发展计划项目(2012AA03A606);江苏省“六大人才高峰”项目;江苏高校优势学科建设工程项目。

Abstract

Abstract:

A stable Ti/Zr composite polymeric sol with Ti:Zr molar ratio of 1:1 was synthesized through the polymeric sol route. Disk a-Al₂O₃ supported mesoporous g-Al₂O₃ membrane with an average pore size of 5-6 nm was used as support for nanofiltration membranes deposition. A defect-free Ti/Zr composite nanofiltration membrane superimposed on the support was fabricated via the dip-coating method followed by drying and calcination. The influence of calcination temperature on Ti/Zr powders was studied. The properties of Ti/Zr composite nanofiltration membrane were also investigated. Ti/Zr powders maintained amorphous state and microporous structure up to a calcination temperature of 500℃. The MWCO, mean pore size and pure water flux of Ti/Zr composite nanofiltration membrane calcined at 400℃ were 880, 1.49 nm and 4.3 L·m^-2·h^-1·MPa^-1, respectively. Under the condition of pH=6 and transmembrane pressure 0.8 MPa, the retention properties of Ti/Zr composite membrane towards 0.005 mol·L^-1MgCl₂ and CaCl₂ solutions were 85% and 78%, respectively.

Key words: ceramic nanofiltration membranes, Ti/Zr composite, ions retention, sol-gel method

摘要：

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5～6 nm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1.49 nm的Ti/Zr复合纳滤膜,该膜的截留分子量(MWCO)为880,纯水通量为4.3 L·m^-2·h^-1·MPa^-1。在pH=6,压力0.8 MPa的条件下,该膜对0.005 mol·L^-1的MgCl₂、CaCl₂的截留率分别为85%和78%。

关键词: 陶瓷纳滤膜, Ti/Zr复合, 离子截留, 溶胶-凝胶法

CLC Number:

TQ028.5

ZHU Guizhi, GUO Honglin, JIANG Qian, QI Hong. Fabrication and properties of Ti/Zr composite nanofiltration membrane[J]. CIESC Journal, 2015, 66(4): 1600-1606.

朱瓌之, 郭红林, 姜迁, 漆虹. Ti/Zr复合纳滤膜的制备及其性能[J]. 化工学报, 2015, 66(4): 1600-1606.

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Fabrication and properties of Ti/Zr composite nanofiltration membrane

Ti/Zr复合纳滤膜的制备及其性能

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