加入壳聚糖改善丝素蛋白结晶性:力学稳定强度更好的三维支架材料

被引：12

作者：

张霞只

司徒方民

彭鹏

焦延鹏

机构：

[1] 暨南大学材料科学与工程系

来源：

中国组织工程研究 | 2015年 / 19卷 / 12期

关键词：

材料试验; 壳聚糖; 丝素蛋白; 生物材料; 材料相容性; 复合支架; 性能研究; 国家自然科学基金;

D O I：

暂无

中图分类号：

R318.08 [生物材料学];

学科分类号：

100103 [病原生物学];

摘要：

背景:丝素蛋白作为天然生物高分子具有良好的生物相容性,但其结晶性能较高、脆性较大,较难得到均匀结构的三维支架材料。目的:通过加入壳聚糖改善丝素蛋白的结晶性,得到具有稳定力学强度的三维组织工程支架材料。方法:采用CaC l2/CH3CH2OH/H2O三元溶液溶解蚕茧,提取丝素蛋白并制成溶液;使壳聚糖溶液与丝素蛋白溶液的质量比分别为2∶1、1∶1、1∶2,采用冷冻干燥法制备多孔丝蛋白/壳聚糖支架材料,并对复合支架进行甲醇浸泡交联处理,以单纯的丝素蛋白和壳聚糖支架为对照。对各组支架进行扫描电镜观察,红外光谱和X射线衍射、孔隙率、吸水率及在水环境下的周期性循环压缩力学性能测试。结果与结论:复合支架的孔隙结构比纯丝素蛋白支架更均匀有序,并且壳聚糖含量越高,复合支架的孔隙越均匀有序、孔隙率越低、支架结构越致密;当壳聚糖与丝素蛋白的混合比例为1∶2时,在复合支架中的吸水率最高,同时高于丝素蛋白支架,但低于壳聚糖支架;随丝素蛋白成分的增加,复合支架弹性更好,保持形状的能力更优。

引用

页码：1858 / 1863

页数：6

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