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采用硅烷偶联剂 (A- 174)对羟基磷灰石 (HA)表面进行处理 ,XPS分析表明 ,偶联剂在羟基磷灰石表面形成多层结构 ,并生成稳定的化学键 O- P- Si。将经偶联剂处理的 HA微粉与聚 DL-丙交酯 (PDL L A)复合 ,所制备的复合材料力学强度与处理前相比得到明显提高。SEM显示 ,经处理后的 HA微粒在 PDL L A基质中分散均匀 ,两者结合紧密。本文作者认为 ,加强复合材料的界面相互作用和提高填充质在基质中的分散度是提高复合材料力学强度的有效途径。
The surface of hydroxyapatite (HA) was treated with silane coupling agent (A-174). XPS analysis showed that the coupling agent formed multi-layer structure on the surface of hydroxyapatite and formed a stable chemical bond O-Si . The coupling agent-treated HA micropowder and poly-DL-lactide (PDL LA) were compounded, and the mechanical strength of the composites prepared was significantly improved compared with that before treatment. SEM showed that the treated HA particles were uniformly dispersed in the PDL LA matrix and the two bound tightly. The authors believe that to enhance the interfacial interaction of composites and improve the dispersion of filler in the matrix is an effective way to improve the mechanical strength of composites.