Barnacle Cement as Surface Anchor for 鈥淐licking鈥?of Antifouling and Antimicrobial Polymer Brushes on Stainless Steel

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• 作者：Wen Jing Yang ; Tao Cai ; Koon-Gee Neoh ; En-Tang Kang ; Serena Lay-Ming Teo ; Daniel Rittschof
• 刊名：Biomacromolecules
• 出版年：2013
• 出版时间：June 10, 2013
• 年：2013
• 卷：14
• 期：6
• 页码：2041-2051
• 全文大小：833K
• 年卷期：v.14,no.6(June 10, 2013)
• ISSN：1526-4602

文摘

Barnacle cement (BC) was utilized 鈥榖eneficially鈥?as a surface anchor on stainless steel (SS) for coupling of functional polymer brushes via 鈥渃lick鈥?reactions in both 鈥済rafting-to鈥?and 鈥済rafting-from鈥?processes. Ethylene sulfide (ES), propargyl carbonylimidazole (PPC) and azidoethyl carbonylimidazole (AEC) reacted with amine and/or hydroxyl groups in BC to introduce the corresponding thiol, alkyne, and azide groups on SS surfaces (SS-thiol, SS-alkyne, and SS-azide, respectively). Antifouling zwitterionic SS-PMPC surface was prepared by thiol鈥揺ne photopolymerization of 2-methacryloyloxyethyl phosphorylcholine (MPC) from the SS-thiol surface. Protein-resistant SS-PPEGMA and protein-adsorbing SS-PPFS surfaces were prepared by coupling of the respective azide-functionalized poly(poly(ethylene glycol)methyl ether methacrylate) (azido-PPEGMA) and poly(2,3,4,5,6-pentafluorostyrene) (azido-PPFS) polymer brushes in azide鈥揳lkyne 鈥渃lick鈥?reaction. Antifouling alkyne-functionalized poly(N-hydroxyethyl acrylamide) (alkynyl-PHEAA) and antibacterial alkyne-functionalized poly(2-(methacryloyloxy)ethyl trimethylammonium chloride) (alkynyl-PMETA) polymer brushes were clicked on the SS-azide surface. Adsorption of bovine serum albumin and bacteria fouling of Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus epidermidis (S. epidermidis) were investigated on the polymer-functionalized SS surfaces. The versatile bioanchor and functional polymer brush coatings are stable in an abiotic aqueous environment for over a month.