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为了改善聚丁二酸丁二醇酯poly-(butylene succinate)一壳聚糖复合材料的表面生物学性能,进行193 nm激光刻蚀该复合材料的研究,以提高该复合材料的表面生物活性.采用表面轮廓仪、表面水接触角分析仪、扫描电镜、红外衰减全反射研究改性后材料表面的特性;并采用DNA分析的方法分析材料表面细胞的生物学特性.研究结果表明,复合材料表面与本体的激光刻蚀能量闻值分别为59 mJ/cm2和125 mJ/cm2.图像定量分析表明随着刻蚀次数的增加,表面壳聚糖累计面积从0.9 mm2增加到4.5 mm2,达到其本体复合的比例.表面水接触角随着刻蚀次数的增加从91度减少到28度.细胞学实验表明刻蚀后表面的壳聚糖促进了成骨细胞在复合材料表面的粘附及生长.用激光表面选择性刻蚀可以提高复合材料表面生物活性的成分从而改善其生物活性.

参考文献

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