A study on poly (N-vinyl-2-pyrrolidone) covalently bonded NiTi surface for inhibiting protein adsorption

被引：5
作者：
Yu, Hongyan [1 ,2 ]
Liu, Yang [2 ]
Wang, Yajie [3 ]
Liu, Li [3 ]
Li, Bolong [2 ]
Li, Yan [1 ]
Zhao, Xinqing [1 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Beijing Key Lab Radiat Adv Mat, Beijing Res Ctr Radiat Applicat, Beijing 100015, Peoples R China
[3] Capital Med Univ, Beijing Tiantan Hosp, Dept Clin Lab Diag, Core Lab Clin Med Res, Beijing 100050, Peoples R China
来源：
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL | 2016年 / 26卷 / 06期
关键词：
NiTi; Poly (N-vinyl-2-pyrrolidone); Shape memory alloy; Surface modification; Irradiation; Protein adsorption; SHAPE-MEMORY ALLOYS; RADIATION-INDUCED SYNTHESIS; CORROSION-RESISTANCE; GAMMA-IRRADIATION; PLASMA-PROTEIN; BIOCOMPATIBILITY; OXIDATION; MEMBRANES; COATINGS; TITANIUM;
D O I：
10.1016/j.pnsc.2016.11.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Near equiatomic NiTi alloys have been extensively applied as biomaterials owing to its unique shape memory effect, superelasticity and biocompatibility. It has been demonstrated that surfaces capable of preventing plasma protein adsorption could reduce the reactivity of biomaterials with human blood. This motivated a lot of researches on the surface modification of NiTi alloy. In the present work, following heat and alkaline treatment and silanization by trichlorovinylsilane (TCVS), coating of poly (N-vinyl-2-pyrrolidone) (PVP) was produced on the NiTi alloy by gamma ray induced chemical bonding. The structures and properties of modified NiTi were characterized and in vitro biocompatibility of plasma protein adsorption was investigated. The results indicated that heat treatment at 823 K for 1 h could result in the formation of a protective TiO2 layer with "Ni-free" zone on NiTi surface. It was found that PVP was covalently bonded on NiTi surface to create a hydrophilic layer for inhibiting protein adsorption on the surface. The present work offers a green approach to introduce a bioorganic surface on metal and other polymeric or inorganic substrates by gamma irradiation.
引用
收藏
页码：584 / 589
页数：6
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