Functionalization of Titanium Surfaces with Polymer Brushes Prepared from a Biomimetic RAFT Agent
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- 作者：Ce虂dric Zobrist ; Jonathan Sobocinski ; Joe虉l Lyskawa ; David Fournier ; Vale虂rie Miri ; Michel Traisnel ; Maude Jimenez ; Patrice Woisel
- 刊名：Macromolecules
- 出版年：2011
- 出版时间：August 9, 2011
- 年：2011
- 卷：44
- 期：15
- 页码：5883-5892
- 全文大小：1055K
- 年卷期：v.44,no.15(August 9, 2011)
- ISSN：1520-5835
文摘
Well-defined dopamine end-functionalized polymers were synthesized by employing the reversible addition鈥揻ragmentation chain transfer (RAFT) polymerization technique. tert-Butyl acrylate, N-isopropylacrylamide, and styrene monomers were polymerized in the presence of azobis (isobutyronitrile) and a new catechol-based biomimetic RAFT agent incorporating a trithiocarbonate unit. All RAFT polymerizations exhibited pseudofirst-order kinetics, a linear increase of the number-average molar mass (Mn SEC) with conversion and narrow molar mass distributions (polydispersity <1.2). The resulting homopolymers exhibited the electroactive catechol and the 蠅-trithiocarbonyl end groups. Subsequent immobilization of dopamine end-functionalized polymers on titanium surfaces was monitored by using a surface plasmon resonance (SPR) sensor, and the resulting films were characterized by contact angle, infrared ATR spectroscopy, atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS).