CIESC Journal ›› 2015, Vol. 66 ›› Issue (9): 3769-3775.DOI: 10.11949/j.issn.0438-1157.20150936

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Fabrication of high performance ZrO2-TiO2 NF membranes via a modified colloidal sol-gel process

LU Yawei, CHEN Xianfu, WEN Juanjuan, QIU Minghui, FAN Yiqun   

  1. College of Chemical Engineering, State Key Laboratory of Materials-oriented Chemical Engineering, National Engineering Research Center for Special Separation Membranes, Nanjing Tech University, Nanjing 210009, Jiangsu, China
  • Received:2015-06-16 Revised:2015-06-23 Online:2015-09-05 Published:2015-09-05
  • Supported by:

    supported by the National High Technology Research and Development Program of China (2012AA03A606), the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the "Peak Specialists in Six Industries" High-level Specialist Fund of Jiangsu Province (2012JNHB016).

改进的颗粒溶胶工艺制备高性能ZrO2-TiO2复合纳滤膜

陆亚伟, 陈献富, 闻娟娟, 邱鸣慧, 范益群   

  1. 南京工业大学化工学院, 材料化学工程国家重点实验室, 国家特种分离膜工程技术研究中心, 江苏 南京 210009
  • 通讯作者: 范益群
  • 基金资助:

    国家高技术研究发展计划项目(2012AA03A606);江苏高校优势学科建设工程;江苏省“六大人才高峰”项目。

Abstract:

The optimized ZrO2-TiO2 composite colloidal sols with an average particle size of 3 nm were successfully synthesized via a modified colloidal sol-gel process by using water as solvent. Tubular α-Al2O3 membranes with a mean pore size of 5 nm were used as the intermediate layers. Defect-free ZrO2-TiO2 NF membranes were then fabricated on the interlayer surface via a dip-coating method. The ZrO2-TiO2 NF membranes with an average toplayer thickness of 200 nm showed the relatively high pure water permeability of about 23 L·m-2·h-1·(0.1 MPa)-1 and low MWCO of about 600. Meanwhile, the ZrO2-TiO2 NF membranes indicated the high retention rates for Co2+, Sr2+ and Cs+ of 99.6%, 99.2% and 75.5% at the condition of low salts concentration, pH 3 and the transmembrane pressure of 0.9 MPa, respectively.

Key words: ceramic NF membranes, colloidal sols, ZrO2-TiO2, ions rejection

摘要:

以水为溶剂,采用改进的颗粒溶胶工艺,通过溶胶制备参数的调控优化,制备得到平均粒径为3 nm的ZrO2-TiO2复合颗粒溶胶。采用浸浆法,在平均孔径为5 nm的管式α-Al2O3底膜上,经过一次涂膜制备得到完整无缺陷的ZrO2-TiO2复合纳滤膜。ZrO2-TiO2复合纳滤膜的平均膜厚约为200 nm,纯水渗透率约为23 L·m-2·h-1·(0.1 MPa)-1,对PEG的截留分子量为600。在pH 3,压力0.9 MPa的条件下,该膜对低浓度的Co2+、Sr2+、Cs+的截留率分别达到99.6 %、99.2 %和75.5 %。

关键词: 陶瓷纳滤膜, 颗粒溶胶, ZrO2-TiO2, 离子截留

CLC Number: