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采用静电纺丝技术,以联苯四甲酸二酐(BPDA)和4,4’-二氨基二苯醚(ODA)为单体,硝酸银为银源,通过两步法制备含银聚酰亚胺(PI/Ag)纳米纤维.通过X射线衍射(XRD)、透射电子显微镜(TEM)及扫描电子显微镜(SEM)表征了PI/Ag纳米纤维的结构和微观形貌;通过浸渍培养法研究了聚酰亚胺(PI)及PI/Ag纳米纤维的抑菌性能.结果表明,聚酰亚胺基体中存在单质银的立方晶体结构,银粒子在聚酰亚胺基体表面均匀分散,平均粒径为10 nm;PI/Ag纳米纤维对大肠杆菌(E.coli)、金黄色葡萄球菌(S.aureus)和枯草芽孢杆菌(B.subtilis)表现出良好的抑菌效果,最大抑菌率可达99.1%,为聚酰亚胺在耐高温抑菌生物医用材料等领域的应用提供了新的方向.
Electrospinning technique was used to synthesize silver-containing polyimide by biphenyl tetracarboxylic dianhydride (BPDA) and 4,4’-oxydianiline (ODA) as monomers and silver nitrate as silver source. (PI / Ag) nanofibers.The structure and morphology of PI / Ag nanofibers were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) (PI) and PI / Ag nanofibers.The results showed that there existed cubic crystal structure of elemental silver in the polyimide matrix, the silver particles were uniformly dispersed on the surface of the polyimide matrix, the average particle size Was 10 nm. PI / Ag nanofibers showed good antibacterial activity against E. coli, S. aureus and B. subtilis, and the maximum inhibitory rate 99.1%, which provides a new direction for the application of polyimide in the field of biomedical materials with high temperature and bacteriostasis.