采用甲氧基聚乙二醇(MPEG)为原料,经甲苯二异氰酸酯(TDI)和γ-氨丙基三乙氧基硅烷偶联剂进行硅烷化反应制备的产物-硅烷化甲氧基聚乙二醇(MPEG-Si),对经过氩低温等离子体处理后的镍钛合金进行表面接枝改性.研究了溶液酸度对MPEG-Si接枝镍钛合金的影响.利用全反射付立叶变换红外光谱和原子力显微镜对接枝层表面化学结构进行了分析和表征,实验结果表明,沉积的涂层具有MPEG-Si大分子结构特性,当pH=2时,MPEG-Si能够均匀地接枝到镍钛合金表面,并且高分子薄膜层晶粒均匀致密;体外抗凝血实验证明,表面接枝MPEG-Si可以有效改善镍钛合金的抗凝血性能.
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