纳米羟基磷灰石/聚合物复合支架的制备与表征

Preparation and characterization of nano-hydroxyapatite/polymer composite scaffolds.

作者信息

Xiao Xiufeng, Liu Rongfang, Huang Qiongyu

机构信息

College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China.

出版信息

J Mater Sci Mater Med. 2008 Nov;19(11):3429-35. doi: 10.1007/s10856-008-3499-x. Epub 2008 Jun 24.

Abstract

Polycaprolactone/chitosan (PCL/CS) porous composite scaffolds were prepared by solution phase separation method, and the scaffolds were further enhanced by filling with nano-hydroxyapatite/polyvinyl alcohol (n-HA/PVA) composite slurry to prepare n-HA-PVA/PCL-CS composite porous scaffolds through slurry centrifugal filling technique. The morphology, microstructure, component, porosity and mechanical property of the scaffolds were characterized using scanning electron microscope, X-ray diffraction, Fourier transform infrared spectroscope, elemental analyzer and material test machine. The results show that PCL/CS scaffolds have mutual transfixion porous structure just like honeycombs. The porosity of the scaffolds can achieve 60-80%. As the content of CS increases, the porosity increases while the compressive strength decreases. After filled with HA/PVA composite slurry, the porosity of n-HA/PCL-CS composite scaffolds decreases, but still greater than 60%, while the compression modulus can increase to 25.7 MPa.

摘要

采用溶液相分离法制备聚己内酯/壳聚糖(PCL/CS)多孔复合支架,并通过填充纳米羟基磷灰石/聚乙烯醇(n-HA/PVA)复合浆料对支架进行进一步增强,采用浆料离心填充技术制备n-HA-PVA/PCL-CS复合多孔支架。利用扫描电子显微镜、X射线衍射仪、傅里叶变换红外光谱仪、元素分析仪和材料试验机对支架的形貌、微观结构、成分、孔隙率和力学性能进行了表征。结果表明,PCL/CS支架具有相互贯通的蜂窝状多孔结构。支架的孔隙率可达60%-80%。随着CS含量的增加,孔隙率增加,抗压强度降低。填充HA/PVA复合浆料后,n-HA/PCL-CS复合支架的孔隙率降低,但仍大于60%,而压缩模量可提高到25.7MPa。

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