膜科学与技术

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Pore size tailoring of mesoporous ceramic membranes via surface grafting route

Authors： ZHANG Ting, LI Xue, XIONG Feng, QIU Minghui, FAN Yiqun*

Units： State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China

KeyWords： surface grafting; mesoporous ceramic membrane; hydrophilic modification; pore size

ClassificationCode：TQ174

year,volume(issue):pagination： 2016,36(1):45-49

Abstract：

Surface grafting is a key technique for chemical modification of ceramic membranes, noteworthily, when the grafting molecule size has a magnitude equal to the pore size of the membranes, the surface grafting process will inevitably affect the membrane pore size. In this paper, with the purpose of regulating the ceramic membrane pore size, the amino silane was grafted on the surface and pores of the mesoporous ceramic membranes via surface grafting, the effect of the grafting process on the properties of ceramic membranes was studied, and great attention was paid to the influence of the grafted APS molecules on the pore size of ceramic membranes. Fourier transform infrared spectroscopy(FTIR) and thermogravimertric analyses(TGA) confirmed the grafting of APS molecules onto the ceramic membrane surface. Water contact angle(CA) measurements indicated that the membranes were still hydrophilic after modification. Finally, the ceramic membrane with a MWCO of 1000 Da was obtained by controlling the concentration of APS in the modification solution 10 mmol/L, and the pore size decreased by 1 nm compared to the original membranes.

Funds：

国家“863”计划课题(2012AA03A606)、江苏高校优势学科建设工程资助项目(PAPD)

AuthorIntro：

作者简介: 张婷(1989-), 女, 江苏徐州人, 硕士, 从事膜分离材料的研究与应用. *通讯联系人

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