微波等离子体对聚乙烯材料的表面改性

Surface Modification of Polyethylene by Microwave Plasma

对高分子材料进行表面修饰，可以赋予材料表面新的物理和化学性能，提高材料的亲水性、粘结性、电镀和生物匹配性等．在表面改性方法中，新近发展的等离子体改性技术由于具有操作简单，工艺干法化，不影响材料本体结构和性能等优点而日益受到人们的重视［１，２］．微波等...

Surface modifications of polyethylene(PE) by various microwave plasma(N 2, CO 2, O 2) were investigated and compared. These plasma treatment all improve the hydrophilicity of samples and introduce oxygen containing groups into the samples surface. Moreover amine was also formed for the N 2 plasma modified. The effect of N 2 plasma modification is best on the improvement of surface hydrophilicity, and its modification depth is about 5￣6 nm, which can be got by calculating from the result of angular dependent ESCA analysis. The influences of sample location, microwave power, system pressure and treatment time on hydrophilicity of plasma modified PE were also studied. The results show that a similar pattern and the optimal operation conditions are suited for these plasma treatment.