采用XPS与接触角法研究氟聚合物表面结构与性能  

Surface Structure and Properties of Fluorocopolymers Studied by XPS and Contact Angle

作　　者：张庆华[1] 刘龙孝[1] 陈丰秋[1] 詹晓力[1] 

机构地区：[1]浙江大学化工系,杭州310027

出　　处：《高等学校化学学报》2006年第4期790-792,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20376070);浙江省自然科学基金(批准号:404295)资助

摘　　要：The surface composition and properties of the copolymer miniemulsions containing fluorinated acrylate(FA) were investigated by X-ray photoelectron spectroscopy(XPS) and contact angle measurements.The surface energy of these copolymers was calculated by the harmonic equation from the static contact angles.The surfaces of the copolymers are very hydrophobic even with a low content of FA due to the surface enrichment of FA segments.The surface energy of copolymers decreases drastically with the increase of FA content and can reach 11.6 mN/m when the concentration of FA in copolymerization increases to 17.54%.The element composition and surface segregation of the fluorinated component as a function of depth of fluorocopolymer thick films were investigated by angle-dependent XPS.The content of fluorine on the surface of copolymers was higher than the calculated value according to the feeds.Our analyses demonstrate that the side groups containing fluorine tend to enrich on the copolymer-air interface.The surface segregation is enhanced when the samples are annealed,which results in further decrease of surface energy.The surface composition and properties of the copolymer miniemulsions containing fluorinated acrylate （FA） were investigated by X-ray photoelectron spectroscopy （XPS） and contact angle measurements. The surface energy of these copolymers was calculated by the harmonic equation from the static contact angles. The surfaces of the copolymers are very hydrophobic even with a low content of FA due to the surface enrichment of FA segments. The surface energy of copolymers decreases drastically with the increase of FA content and can reach 11.6 mN/m when the concentration of FA in copolymerization increases to 17.54%. The element composition and surface segregation of the fluorinated component as a function of depth of fluorocopolymer thick films were investigated by angle-dependent XPS. The content of fluorine on the surface of copolymers was higher than the calculated value according to the feeds. Our analyses demonstrate that the side groups containing fluorine tend to enrich on the copolymer-air interface. The surface segregation is enhanced when the samples are annealed, which results in further decrease of surface energy.

关 键 词：氟聚合物 表面能 接触角 X射线光电子能谱 

分 类 号：O631[理学—高分子化学]