Application of biomedical β-type titanium alloy for artificial tendon by polymer hybrid technique

为了提高生物医用钛合金Ti-29 Nb-13 Ta 4的软组织生物相容性。6 Zr（TNTZ）嵌段聚氨酯（SPU）涂层进行了硅烷偶联处理。采用3种硅烷偶联剂研究了TNTZ与SPU之间的粘接强度与偶联剂种类的关系，结果表明，以甲基丙烯酰氧基丙基三甲氧基硅烷（γ-MPTS）为偶联剂时，TNTZ与SPU在超纯水中浸泡30 d后的剪切粘接强度最高。界面分析表明，γ-MPTS具有较高的化学稳定性，因而具有良好的耐湿性。

In order to improve the soft tissue biocompatibility of a biomedical titanium alloy, Ti-29Nb-13Ta4. 6Zr (TNTZ), segmented polyurethane (SPU)coating was investigated using silane coupling treatment. Dependence of silane coupling agent on bonding strength between TNTZ and SPU was investigated using three types of silane coupling agents.The shear bonding strength between TNTZ and SPU after immersion in ultrapure water for 30 days is the highest, when methacryloxypropyl trimethoxysilane (γ-MPTS)is used as a silane coupling agent. According to interfacial analysis, it is found that γ-MPTS exhibits high chemical stability so that it provides good humidity resistance.