Ag离子注入聚合物表面形貌原子力显微镜观察及其特性研究  

PROPERTIES OF TRIBOLOGY FOR Ag INPLANTED PET

作　　者：吴瑜光[1] 张通和[1] 张荟星[1] 张孝吉[1] 

机构地区：[1]北京师范大学射线束技术和材料改性教育部重点实验室

出　　处：《北京师范大学学报（自然科学版）》2001年第6期754-757,共4页Journal of Beijing Normal University(Natural Science)

基　　金：国家自然科学基金资助项目 (5 96 710 5 1) ;国家"八六三"计划资助项目

摘　　要：采用MEVVA离子注入机引出的Ag离子进行了聚酯薄膜改性研究 ,注入后的聚酯膜表面结构发生了很大的变化 ,用原子力显微镜观察了注入样品表面形貌的变化 ,表面粗糙度与注量密切相关 .透射电子显微镜观察注入聚酯膜的横截面表明 ,随注量的增加 ,在注入层形成了纳米颗粒和富集的碳颗粒 .这些颗粒增强了注入层表面强化效果 .注入层表面电阻率随注量的增加而明显地下降 .用纳米硬度计测量显示 ,Ag离子注入可明显地提高聚酯膜表面硬度和弹性模量 ,从而极大地增强了表面抗磨损特性 .讨论了Ag离子注入聚酯膜改善特性的机理 .Polyethylene terephthalane (PET) is modified with Ag ions extracted from a metal vapor arc source (MEVVA). After implantation, the surface structure and morphology are greatly changed. The surface morphology is observed by atomic force microscope (AFM). The surface is smooth when the dose of Ag implants ranges from 5×10 15 cm -2 to 1×10 17 cm -2. And when Ag implants reaches a dose of 2×10 17 cm -2, the surface becomes rough compared with unimplanted PET. TEM photo shows that the nano-particles are formed. The PET has been strengthened by these dispersed nano-particles. The measurement results using nano meter hardness tester show that the surface hardness and modulus increase obviously. Therefore the surface wear resistance are improved extremely. The resistivity of Ag implanted PET decreases with increasing Ag ion dose. Finally the modification mechanism of Ag implanted PET are discussed.

关 键 词：银离子注入 摩擦特性 纳米颗粒 聚合物表面强化机理 聚酯薄膜 表面形貌 原子力显微镜观察 

分 类 号：O484.1[理学—固体物理] TN305.3[理学—物理]