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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。
Select the thermoplastic polyurethane (PU) as the matrix material, with polyethylene glycol (PEG) hydrophilic modification of the matrix material, with copper nanoparticles instead of brass or copper bulk brass, using a total of mechanical A novel IUD material, polyurethane / polyethylene glycol / nano-copper composite material, was prepared by the mixed method and characterized by FTIR, XRD and SEM (SEM), mechanical properties test, thermal stability test and water absorption test were used to characterize the structure and properties of the composites. The results show that nano-copper powder dispersed in the matrix more uniform, polyurethane / polyethylene glycol / nano-copper composite tensile strength, tear strength decreased with the increase of polyethylene glycol content, elongation at break, heat The stability and water absorption properties increase with the increase of polyethylene glycol content. The improvement of water absorption properties provides a good foundation for the further study of controlled release of copper ion in composite materials.