摘要
通过垂直提拉工艺利用水辅助自组装法在生物医用不锈钢表面制备出大面积规则排列微孔丙交酯．乙交酯共聚物（PLOA）涂层，实验证明溶液浓度和PLGA的分子量对涂层的微孔排列形貌有较大影响。高浓度和高分子量的PLGA溶液有利于获得大面积规则排列的微孔涂层；反之，则易出现多边形胞状的不均匀微孔排列结构。分析认为多边形胞状结构的形成与表面张力梯度引发的Marangoni对流效应有关。通过该方法可实现复杂轮廓金属器械表面的高分子微孔涂层生物改性。
Under a vertical withdraw process, large-area regular array microporous films from poly（L-lactic-co-glycolic acid） （PLGA） were prepared on medical metallic stainless steel substrates by water-assisted self-assembly method. The experimental results show that concentration and molecular weight of polymer have great influence on the pore morphology. The higher concentration and the larger molecular weight are favorable to the formation of large-area regular array microporous film. In contrast, the lower concentration and the smaller molecular weight often results in polygonal cellular microporous array patterns. It is surgusted that Maranngoni convection driven by temperature dependence of the surface tension may be responsible for the polygonal cellular patterns formation. Utilizing the vertical withdraw process, it is feasible to prepare large-area regular array microporous film of polymer on various shape metallic substrates.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第A05期1874-1876,共3页
Journal of Functional Materials
基金
辽宁省自然科学基金资助项目（20062185）
关键词
微孔膜
高分子
大面积规则排列
microporous film
polymer
large-area regular array
