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Hydrophilic Modification of Microporous Polysulfone Membrane via surface-initiated atom transfer radical polymerization and Hydrolysis of Poly（glycidylmethacrylate）

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Chinese Journal of Chemistry 2012年第10期30卷 2473-2482页

作者：王超展赵飒卫引茂 Key Laboratory of Synthetic and Natural Function Molecule Chemistry of Ministry of Education College of Chemistry&Material SeieneeNorthwest UniversityXi'anShannxi 710069China

Poly（glycidylmethacrylate）（PGMA） brushes were grafted from chloromethylated polysulfone （CMPSF） mem- brane surface by surface-initiated atom transfer radical polymerization （S1-ATRP）, and the grafting was followed by hydrolysis of epoxy groups in the grafting chains to improve the membrane＇s hydrophilie property. Fourier trans- form infrared spectroscopy （FT-IR） and X-ray photoelectron spectroscopy （XPS） measurements confirmed the suc- cessful grafting and hydrolysis of PGMA. The grafting degree of the monomer, measured by periodic acid titration and gravimetric analysis, increased linearly with the polymerization time, while the static water contact angle of the membrane grafted with PGMA or hydrolyzed PGMA linearly decreased. In comparison with the PGMA-grafted membranes, the hydrolyzed PGMA-grafted membranes possess stronger hydrophilicity as indicated by their contact angle and hydration capacity, and as a result they have an improved antifouling property. Therefore, the control of the hydrophilicity of PSF membrane could be realized through adjusting the polymerization time and transforming the functional groups in the grafting chain.

关键词： membranes hydrophilic modification surface-initiated atom transfer radical polymerization hydroly-sis antifouling

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A novel hydrophilic polystyrene-based beads for hydrophilic interaction chromatography by surface-initiated atom transfer radical polymerization

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Chinese Chemical Letters 2011年第2期22卷 245-248页

作者： Xiao Jun Dai Yuan He Yin Mao Wei Bo Lin Gong Key Laboratory of Synthetic and Natural Function Molecule Chemistry of Ministry of Education College of Chemistry & Material Science Northwest University Xi'an 710069 China Key Laboratory of Energy & Chemical Engineering Ningxia University Yinchuan 750021 China Received 4 June 2010

A one-step procedure to hydrophilize monodisperse poly（chloromethyl-styrene-co-divinylbenzene） beads has been presented with 2-hydroxy-3-[4-（hydroxymethyl）-1H-1,2,3-triazol-1-yl]propy1 2-methylacrylate（HTMA） as monomer by surface-initiated atom transfer radical polymerization（SI-ATRP）.The length of the grafted poly（HTMA） chain was varied via controlling the ratio of HTMA to initiator on the surface of the *** these grafted beads as the stationary phase in hydrophilic interaction chromatography,good separation was obtained for nucleosides in the mobile phase of *** was also found that the retention time and selectivity of solutes showed a positive relationship with the length of the grafted poly（HTMA） chain.

关键词： Hydrophilic interaction chromatography Polystyrene-based beads surface-initiated atom transfer radical polymerization 1,2,3-Triazole

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Preparation of poly (N-isopropylacrylamide) brush bonded on silicon substrate and its water-based lubricating property

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Science China(Technological Sciences) 2012年第12期55卷 3352-3358页

作者： LIU YuHong XIAO YuQi LUO JianBin State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China

The poly (N-isopropylacrylamide) brush was covalently bonded on an initiator-coated silicon wafer via surface-initiated atom transfer radical polymerization. The polymer brush was (76.2±0.1) nm in thickness (by ellipsometer) with a grafting density of ca. 0.27 chains/nm 2 . The tribological properties of the poly (N-isopropylacrylamide) brush were investigated by means of ball-on-disk tests in a rotational mode under water lubrication for tribological application. The experimental results exhibited a low friction coefficient of ca. 0.03. The excellent lubrication property of the brush was due to its amide groups in the polymer chains. It was supposed that the good lubrication property of the brush was attributed to the cross-linked polymer network formed by the hydrogen bond association of N-H…O==C and the water molecular layer adsorbed by the terminal amide groups in the brush. The poly (N-isopropylacrylamide) solution also exhibits a lubrication property due to physical adsorption of the polymer chains.

关键词： poly(N-isopropylacrylamide) brush surface-initiated atom transfer radical polymerization water-based lubricatingproperties

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Grafting β-CD Copolymer Metal Complex from Silicon Gel by SI-ATRP

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Chemical Research in Chinese Universities 2013年第6期29卷 1029-1031页

作者： JIANG Yan LIANG Yuan ZHANG Hong-wen ZHANG Rong School of Materials Science & Engineering Changzhou University Changzhou 213164 P.R.China

Polymers grafted from solid surface are being extensively studied with a range of *** most popular living/controlled polymerization used in polymers grafted from solid surfaces is the surface-initiated atom transfer radical polymerization（SI-ATRP）[1,2].An attractive feature of atom transfer radical polymerization（ATRP） is to simultaneously grow chains from multifunctional *** the grafted polymer with well-defined structures could be designed and *** has proven to be a powerful tool to synthesize homopolymers and copolymers,under easily accessible experimental conditions[3-7].Furthermore it is useful for the functionalization of material surfaces by grafting certain polymers.

关键词： Silicon gel surface-initiated atom transfer radical polymerization Copolymer metal complex

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