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以丙烯酰胺单体和声化学法制备的纳米羟基磷灰石(hydroxyapatite,HAp)粉为原料、异丙醇为分散介质,采用水热电泳聚合沉积法在C/C复合材料表面制备HAp/聚丙烯酰胺(polyacrylamide,PAM)梯度复合涂层。用电导率仪、X射线衍射仪、扫描电子显微镜、能谱仪、Fourier变换红外分析仪和万能材料试验机等对悬浮液的电导率以及涂层的物相组成、结构、断面微观形貌和结合强度进行了研究,结果表明:异丙醇中碘的浓度为8g/L时,所制备的涂层由HAp和PAM两相组成;HAP被包裹在黏度较大的PAM中,涂层表面均匀,涂层与基体之间结合紧密,未发现明显的裂纹;涂层中元素沿基体–界面方向呈梯度分布;涂层与基体结合强度最大值达到19.10MPa。
Acrylamide monomer and sonochemical chemical preparation of nano-hydroxyapatite (hydroxyapatite, HAp) powder as raw material, isopropanol as the dispersion medium, hydrothermal electrophoresis polymerization deposition method in the C / C composite surface prepared HAp / poly Acrylamide (polyacrylamide, PAM) gradient composite coating. The conductivity of the suspension and the phase composition, structure, cross-sectional morphology and morphology of the coating were characterized by conductivity meter, X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, Fourier transform infrared analyzer and universal material testing machine The results show that when the concentration of iodine in isopropanol is 8g / L, the coating prepared by HAp and PAM two phases; HAP is wrapped in a PAM with larger viscosity, the coating surface is uniform , The bond between the coating and the substrate is close and no obvious cracks are found. The elements in the coating distribute gradiently along the substrate-interface. The maximum bonding strength between the coating and the substrate reaches 19.10MPa.