【摘要】 选择热塑性聚氨酯(polyurethane,PU)为基体材料,以聚乙二醇(polyethylene glycol,PEG)对基体材料进行亲水改性,用纳米铜颗粒代替铜丝或铜管等块体铜,采用机械共混的方法制备了一种全新的宫内节育器(IUD)材料——聚氨酯/聚乙二醇/纳米铜复合材料,并采用红外光谱(FTIR)分析、X射线衍射(XRD)分析、扫描电镜分析(SEM)、力学性能测试、热稳定能测试和吸水性能测试等表征方法对复合材料的结构和性能进行了表征。结果表明,纳米铜粉在基体中分散比较均匀,聚氨酯/聚乙二醇/纳米铜复合材料的拉伸强度、撕裂强度随着聚乙二醇含量的增加而下降,断裂伸长率、热稳定性和吸水性能随着聚乙二醇含量的增加而提高,吸水性能的改善为下一步复合材料铜离子的可控释放研究工作提供了很好的基础。更多还原

【Abstract】 A novel Cu-IUDs material,PU/PEG/Cu nanocomposite,was prepared by melt blending method with thermoplastic polyurethane(PU) as the matrix,with polyethylene glycol(PEG) as a hydrophilic modifier,and with nanometer particles of copper as active matter instead of copper wire or copper tube..The structure,morphology, mechanical properties,thermal stability and water absorption were investigated by using FT-IR,XRD,SEM and so on.The results indicated that the nanometer particles of copper were uniformly dispersed in the matrix in PU/PEG/Cu nanocomposites.It can be seen that the water absorption ability of this nanocomposite was obviously improved while mechanical properties and thermal stability were at high levels.These results provided a good basis for the studies on the cupric ions release of the nanocomposites in future.更多还原