We fabricate a novel cellulose acetate (CA) ultrafiltration membrane modified by block copolymer F127-b- PDMAEMA, which is synthesized using F127 and DMAEMA via the ARGET ATRP method. Compared to conven- tional ultr...We fabricate a novel cellulose acetate (CA) ultrafiltration membrane modified by block copolymer F127-b- PDMAEMA, which is synthesized using F127 and DMAEMA via the ARGET ATRP method. Compared to conven- tional ultrafiltration membranes, the incorporation of both F 127 and PDMAEMA can not only readily increase the hydrophilicity of the membrane, but also exhibit stimuli-responsiveness to temperature and pH. Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (NMR), and gel permeation chromatog- raphy (GPC) are employed to analyze the structure of the F 127-b-PDMAEMA. The membrane properties are eval- uated via scanning electron microscope (SEM) imaging, porosity test, automatic target recognition Fourier trans- form infrared spectroscopy (ATR-FTIR), water contact angle test and permeation test. The results indicate that the F 127-b-PDMAEMA is an excellent pore agent, which contributes to an enhancement of the membrane in sensitivity to temperature and pH. The modified membrane also exhibits lower water contact angle (64.5~), which is attributed to the good anti-fouling performance and high water permeation.展开更多
基金This work was financially supported by the Funda- mental Research Funds for the Central Universities of China (Nos. 3207045403, 3207045409), National Natu- ral Science Foundation of China (Nos. 21576050, 51602052), Jiangsu Provincial Natural Science Founda- tion of China (No. BK20150604) and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
文摘We fabricate a novel cellulose acetate (CA) ultrafiltration membrane modified by block copolymer F127-b- PDMAEMA, which is synthesized using F127 and DMAEMA via the ARGET ATRP method. Compared to conven- tional ultrafiltration membranes, the incorporation of both F 127 and PDMAEMA can not only readily increase the hydrophilicity of the membrane, but also exhibit stimuli-responsiveness to temperature and pH. Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (NMR), and gel permeation chromatog- raphy (GPC) are employed to analyze the structure of the F 127-b-PDMAEMA. The membrane properties are eval- uated via scanning electron microscope (SEM) imaging, porosity test, automatic target recognition Fourier trans- form infrared spectroscopy (ATR-FTIR), water contact angle test and permeation test. The results indicate that the F 127-b-PDMAEMA is an excellent pore agent, which contributes to an enhancement of the membrane in sensitivity to temperature and pH. The modified membrane also exhibits lower water contact angle (64.5~), which is attributed to the good anti-fouling performance and high water permeation.