Electrodeposition of amine-terminated poly(ethylene glycol) to titanium surface

被引:31
作者
Tanaka, Yuta
Doi, Hisashi
Iwasaki, Yasuhiko
Hiromoto, Sachiko
Yoneyama, Takayuki
Asami, Katsuhiko
Imai, Hachiro
Hanawa, Takao [1 ]
机构
[1] Tokyo Med & Dent Univ, Inst Biomat & Bioengn, Tokyo 1010062, Japan
[2] Shibaura Inst Technol, Dept Mat Sci & Technol, Tokyo 1088548, Japan
[3] Natl Inst Mat Sci, Ctr Biomat, Tsukuba, Ibaraki 3050044, Japan
[4] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 2007年 / 27卷 / 02期
关键词
titanium; PEG; immobilization; electrodeposition; surface analysis;
D O I
10.1016/j.msec.2006.03.007
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The immobilization of poly(ethylene glycol), PEG, to a solid surface is useful to functionalize the surface, e.g., to prevent the adsorption of proteins. No successful one-stage technique for the immobilization of PEG to base metals has ever been developed. In this study, PEG in which both terminals or one terminal had been modified with amine bases was immobilized onto a titanium surface using electrodeposition. PEG was dissolved in a NaCl solution, and electrodeposition was carried out at 3 10 K with -5 V for 300 min. The thickness of the deposited PEG layer was evaluated using ellipsometry, and the bonding manner of PEG to the titanium surface was characterized using X-ray photoelectron spectroscopy after electrodeposition. The results indicated that a certain amount of PEG was adsorbed on titanium through both electrodeposition and immersion when PEG was terminated by amine. However, terminated amines existed at the surface of titanium and were combined with titanium oxide as N-HO by clectrodeposition, while amines randomly existed in the molecule and showed an ionic bond with titanium oxide by immersion. The electrodeposition of PEG was effective for the inhibition of albumin adsorption. This process is useful for materials that have electroconductivity and a complex morphology. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:206 / 212
页数:7
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