膜科学与技术

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Preparation of ZrO2 nanofiltration membrane by ultrasound-assisted sol-gel method

Authors： Qiang Yan, Yishan Chen, Minghui Qiu, Xianfu Chen, Yiqun Fan*

Units： 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

KeyWords： ultrasound; sol-gel method; ZrO2; ceramic membrane; nanofiltration

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2018,38(6):90-96

Abstract：

Ultrasound-assisted sol-gel method was proposed for the fabrication of ZrO2 nanofiltration membranes by using water as the solvent. Due to the introduction of ultrasound in the preparation of the colloidal sol, the phenomena of precipitation was avoided. Since the colloidal size was controlled in the hydrolysis stage of the precursor, the ZrO2 colloidal sol with an average particle size of 1~2 nm was obtained. The introduction of ultrasound can not only promote the formation of ZrO2 sol with nanosized colloids, but also help to improve the thermal stability of obtained ZrO2 materials. After been calcinated at 400 °C for 2 h, ZrO2 nanofiltration membrane with a pure tetragonal phase was obtained. The surface of obtained nanofiltration membrane was smooth and defects-free. The thickness of membrane layer was as thin as about 250 nm. The nanofiltration membranes exhibited high separation accuracy and permeation flux. The molecular weight cut off for PEG was 600 Da corresponding to a Stokes diameter of 1.2 nm. The pure water permeability was 200~250 L·m-2·h-1·MPa-1. The application of ZrO2 nanofiltration membrane in the purification of fructo-oligosaccharide was preliminary investigated to remove monosaccharide and disaccharide components from the solution.

Funds：

国家自然科学基金(91534108, 21506093)；国家重点研发计划项目(2016YFC0205700)；国家高技术研究发展计划项目(2012AA03A606)；江苏高等教育重点学科建设项目(PAPD)；江苏省自然科学基金(BK20150947)．

AuthorIntro：

作者简介：严强(1993-)，男，江苏江阴人，硕士，研究方向为膜分离．*通讯联系人

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