基于硅烷偶联剂表面改性制备Al2O3/PVDF杂化膜

doi:10.16085/j.issn.1000-6613.2017.02.035

化工进展 ›› 2017, Vol. 36 ›› Issue (02): 652-657.DOI: 10.16085/j.issn.1000-6613.2017.02.035

基于硅烷偶联剂表面改性制备Al₂O₃/PVDF杂化膜

朱子沛, 汤旭, 何其, 董浩, 朱良, 肖凯军

华南理工大学食品科学与工程学院, 广东广州 510640

收稿日期:2016-05-25 修回日期:2016-09-22 出版日期:2017-02-05 发布日期:2017-02-05
通讯作者: 肖凯军,教授,博士生导师,研究方向为生化反应与分离工程。E-mail:fekjxiao@scut.edu.cn。
作者简介:朱子沛(1991-)男,硕士研究生。E-mail:fezhuzipei@mail.scut.edu.cn。
基金资助:
广东省科技装备动员项目（x2skB2160440）、广东省应用型科技研发专项资金项目（2015B020230001）及广州市产学研协同创新重大专项项目（201508020086）。

Preparation of Al₂O₃/PVDF hybrid membrane from surface-modified silane coupling agent

ZHU Zipei, TANG Xu, HE Qi, DONG Hao, ZHU Liang, XIAO Kaijun

College of Food Sciences and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China

Received:2016-05-25 Revised:2016-09-22 Online:2017-02-05 Published:2017-02-05

摘要/Abstract

摘要： 采用硅烷偶联剂（2-氰乙基）三乙氧基硅烷对纳米Al₂O₃粒子进行表面改性，利用热致相变法制备了改性Al₂O₃/PVDF有机无机杂化膜，研究了改性Al₂O₃的添加量对杂化膜性能的影响。经（2-氰乙基）三乙氧基硅烷改性后，纳米Al₂O₃粒子的团聚减少，改性后纳米Al₂O₃的平均最小粒径为52.23nm。与纯PVDF膜比较，改性纳米Al₂O₃的添加改善了PVDF膜的形貌结构，改性Al₂O₃/PVDF杂化膜形成的球晶明显增加，球晶的密度尺寸缩小，杂化膜中形成了大量连通的界面孔，膜的孔隙率升高，改善了PVDF膜的力学性能和亲水性，提高了截留率。当纳米粒子添加量达到5%时，膜的截留率提高了7.2%，膜的纯水通量达到了593.95L/（m²·h），膜强度达到5.0MPa。

关键词: 硅烷偶联剂, 表面改性, 聚偏氟乙烯, 超滤膜

Abstract: Nano-Al₂O₃ was surface-modified by silane coupling agent (2-cyanogen ethyl) triethoxysilane,with which the modified Al₂O₃/PVDF organic-inorganic hybrid membrane was prepared by thermally induced phase transition. Effect of the dosage of the modified Al₂O₃ on the performance of the hybrid membrane was examined. After modified by (2-cyanogen ethyl) triethoxysilane,the number of nano-Al₂O₃ particle clusters was reduced,and the averaged minimum size of nano-Al₂O₃ particles decreased to 52.23nm.The addition of modified nano-Al₂O₃ improved the morphology of hybrid membrane,compared with the pure PVDF membrane,the spherulite density increased and the spherulite size of hybrid membrane became smaller,and a lot of holes through the interface were formed,resulting in the increased membrane porosity. The hydrophilicity,mechanical properties and rejection of PVDF membrane were improved greatly with the addition of modified Al₂O₃. When the amount of Al₂O₃ was more than 5%,the rejection of the film increased by 7.2%,and the pure water flux of the modified Al₂O₃/PVDF membrane was 593.95L/(m²·h),and mechanical strength of hybrid membrane reached 5.0MPa.

Key words: silane coupling agent, surface modification, polyvinylidene fluoride(PVDF), ultrafiltration membrane

中图分类号:

TB332

朱子沛, 汤旭, 何其, 董浩, 朱良, 肖凯军. 基于硅烷偶联剂表面改性制备Al₂O₃/PVDF杂化膜[J]. 化工进展, 2017, 36(02): 652-657.

ZHU Zipei, TANG Xu, HE Qi, DONG Hao, ZHU Liang, XIAO Kaijun. Preparation of Al₂O₃/PVDF hybrid membrane from surface-modified silane coupling agent[J]. Chemical Industry and Engineering Progree, 2017, 36(02): 652-657.

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基于硅烷偶联剂表面改性制备Al₂O₃/PVDF杂化膜

Preparation of Al₂O₃/PVDF hybrid membrane from surface-modified silane coupling agent

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