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| 1 | Honeycomb-patterned films of polystyrene/poly(ethylene glycol): Preparation, surface aggregation and protein adsorption显示文摘Highly ordered honeycomb-patterned polystyrene (PS)/poly(ethylene glycol) (PEG) films were prepared by a water-assisted method using an improved setup, which facilitated the formation of films with higher regularity, better reproducibility, and larger area of honeycomb structures. Surface aggregation of hydrophilic PEG and adsorption of bovine serum albumin (BSA) on the honeycomb-patterned films were investigated. Field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM) were used to observe the surface morphologies of the films before and after being rinsed with water. As confirmed by the FESEM images and the AFM phase images, PEG was enriched in the pores and could be gradually removed by water. The adsorption of fluorescence-labeled BSA on the films was studied in visual form using laser scanning confocal microscopy. Results clearly demonstrated that the protein-resistant PEG was selectively enriched in the pores. This water-assisted method may be a latent tool to prepare honeycomb-patterned biofunctional surfaces. | WAN LingShu KE BeiBei LI XiaoKai MENG XiangLin ZHANG LuYao XU ZhiKang | 2009 | Science China Chemistry2009，52，7： | 3 |
| 2 | Thermo-responsive stick-slip behavior of advancing water contact angle on the surfaces of poly(N-isopropylacrylamide)-grafted polypropylene membranes显示文摘Wettability of a solid surface is highly important to its practical application,especially for the surface that shows thermoresponsive properties.In this paper,we describe a thermo-responsive stick-slip behavior of water droplets on the surfaces of poly(N-isopropylacrylamide)(PNIPAM)-grafted polypropylene membranes.Field emission scanning electron microscope(FESEM) images elucidate that the morphology of PNIPAM-grafted membrane surface is thermo-responsive,i.e.,the surface becomes rougher above the lower critical solution temperature(LCST) of PNIPAM.On the surface of nascent polypropylene membranes,the water droplet shows a smooth motion resulting in advancing and receding water contact angles of 111° and ~65°,respectively.On the PNIPAM-grafted membrane surfaces,the water droplet shows a stick-slip pattern above the LCST,whereas it advances smoothly below the LCST.This phenomenon is reproducible and can be ascribed to the energy barriers enhanced by the shrink of PNIPAM chains above the LCST.We also find that the slip contact angle decreases from 102° to 92° after several stick-slip cycles.This decrease is attributed to the water adsorption on the grafted PNIPAM layer,which is confirmed by the continuous decrease of the receding water contact angle. | WAN LingShu,MENG XiangLin,YANG YunFeng,TIAN Jing & XU ZhiKang Key Laboratory of Macromolecular Synthesis and Functionalization,Ministry of Education Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027,China | 2010 | Science China Chemistry2010，53，1： | 2 |
| 3 | Porphyrinated nanofibers via copolymerization and electrospinning显示文摘 | Wan Lingshu Wu Jian Xu Zhikang | 2006 | Macromol Rapid Commun2006，27，18： | 1 |
| 4 | Immobilization of eatalase on electrospun nanofibrous membranes modified with bovine serum albumin or collagen: coupling site-dependent activity and protein dependent stability 显示文摘 | Wang Zhengang Wan Lingshu Xu Zhikang | 2009 | SoftMatter2009，5，： | 1 |
| 5 | Poly(vinylidene fluoride)/poly(acrylic acid)/calcium carbonate composite membranes via mineralization,Membran science显示文摘 | Zhi Suohong Wan Lingshu Xu Zhikang | 2014 | 454:144-1542014，454，： | 1 |
| 6 | Surface hydrophilization for polypropylene microporous membranes:A facile interracial crosslinking approach显示文摘 | Yang Yunfeng Wan Lingshu Xu Zhikang | 2009 | Journal of Membrane Science2009，326，2： | 1 |
| 7 | Polymer surfaces structured with random or aligned electrospun nanofibers to promote the adhesion of blood platelets 显示文摘 | Wan Lingshu Xu Zhikang | 2009 | J Biomed Mater Res A2009，89，1： | 1 |
| 8 | Enzyme immobilization on electrospun polymer naofibers: an overview显示文摘 | Wang Zhengang Wan Lingshu | 2009 | Journal of Molecular Catalysis B: Enzymatic2009，56，4： | 1 |
| 9 | Surface modification of polypropylene microfiltration membranes by the immobilization of poly(N-vinyl-2-pyrrolidone):A facile plasma approach显示文摘 | Liu Zhenmei Xu Zhikang Wan Lingshu | | 0，，1： | 1 |
| 10 | Surface glycosylation of polymeric membranes显示文摘Surface glycosylation of polymeric membranes has been inspired by the structure of natural biomem-branes. It refers to that glycosyl groups are introduced onto the membrane surface by various strate-gies, which combine the separation function of the membrane with the biological function of the sac-charides in one system. In this review, progress in the surface glycosylation of polymeric membranes is highlighted in two aspects, i.e. the glycosylation methods and the potential applications of the sur-face-glycosylated membranes. | DAI ZhengWei WAN LingShu XU ZhiKang | 2008 | Science China Chemistry2008，51，10： | 1 |
| 11 | Controlled synthesis of linear and comb-like glycopolymers for preparation of honeycomb-patterned films显示文摘 | Ke Beibei Wan Lingshu Zhang Wenxu | 2010 | Polymer2010，51，10： | 1 |
| 12 | Graft polymerization of 2-hydroxyethyl methacrylate via ATRP with poly(acrylonitrile-co-p-chloromethyl styrene) as a macroinitiator显示文摘Amphiphilic graft copolymers are excellent additives for the development of antifouling membranes by nonsolvent induced phase separation. We report a convenient approach to the synthesis of novel graft copolymers with hydrophobic polyacrylonitrile (PAN) backbones and hydrophilic poly(2-hydroxyethyl methacrylate) (PHEMA) side chains. Atom transfer radical polymerization (ATRP) of 2-hydroxyethyl methacrylate was carried out with poly(acrylonitrile-co-p-chloromethyl styrene) (PAN-co-PCMS) as a macroinitiator in the presence of CuCl/2,2'-bipyridine at 50 °C in dimethyl sulfoxide. Kinetics of the graft polymerization was also evaluated. The synthesis of poly(acrylonitrile-co-p-chloromethyl styrene-g-2-hydroxyethyl methacrylate) (PAN-co-(PCMS-g-PHEMA)) can be relatively controlled when CMS (the ATRP sites) unit in the macroinitiator is around 5 mol%. Both the macroinitiators and graft copolymers were characterized by FTIR, NMR and GPC. The surface morphology and wettability of the copolymer films were studied by AFM and water contact angle measurement, respectively. We demonstrate that phase segregation between the PAN-co-PCMS backbones and the PHEMA side chains takes place and the surface hydrophilicity of the graft copolymers increases with the length of the PHEMA side chains. Because these amphiphilic graft copolymers can be synthesized in mass, they will be useful as latent additives for the fabrication of advanced PAN separation membranes. | WANG Fang WAN LingShu XU ZhiKang | 2012 | Science China Chemistry2012，55，6： | 0 |
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