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HYDROPHILIC nanofiltration membrane. WITH SELF-POLYMERIZED AND STRONGLY-ADHERED POLYDOPAMINE AS SEPARATING LAYER

Chinese Journal of Polymer Science 2012年第2期30卷 152-163页

作者：朱利平 MOE Key Laboratory of Macromolecule Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang UniversityHangzhou 310027China

Inspired by the self-polymerization and strong adhesion characteristics of dopamine in aqueous conditions, a novel hydrophilic nanofiltration （NF） membrane.was fabricated by simply dipping polysulfone （PSf） ultrafiltration （UF） substrate in dopamine solution. The changes in surface chemical composition and morphology of membrane. were determined by Fourier transform infrared spectroscopy （FTIR-ATR）, X-ray photoelectron spectroscopy （XPS）, scanning electron microscopy （SEM） and atomic force microscopy （AFM）. The experimental results indicated that the self-polymerized dopamine formed an ultrathin and defect-free barrier layer on the PSf UF membrane. The surface hydrophilicity of membrane. was evaluated through water contact angle measurements. It was found that membrane.hydrophilicity was significantly improved after coating a polydopamine （pDA） layer, especially after double coating. The dyes filtration experiments showed that the double-coated membrane. were able to reject completely the dyes of brilliant blue, congo red and methyl orange with a pure water flux of 83.7 L/（mE.h） under 0.6 MPa. The zeta potential determination revealed the positively-charged characteristics of PSf/pDA composite membrane.in NF process. The salt rejection of the membrane. was characterized by 0.01 mmol/L of salts filtration experiment. It was demonstrated that the salts rejections followed the sequence： NaC1 〈 NaaSO4 〈 MgSO4 〈 MgC12 〈 CaCl2, and the rejection to CaC12 reached 68.7%. Moreover, the composite NF membrane. showed a good stability in water-phase filtration process.

关键词： Dopamine Self-polymerization Strong adhesion nanofiltration membrane.

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A NOVEL nanofiltration membrane.PREPARED WITH PAMAM AND TMC (Ⅰ)

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Chinese Journal of Polymer Science 2008年第6期26卷 659-668页

作者：徐又一 Institute of Polymer Science Zhejiang University

A series of nanofiltration (NF) membrane. were prepared with poly(amido-amine) (PAMAM) and trimesoyl chloride (TMC) via in situ interfacial *** effects of the generation number and concentration of PAMAM on the properties of NF membrane. were *** transform infrared spectroscopy (FTIR-ATR),atomic force micrgscopy (AFM),scanning electron microscopy (SEM) and contact angle measurements were employed to characterize the resulting *** nanofiltration performances were evalua...

关键词： PAMAM TMC nanofiltration membrane.

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