摘要
聚合物薄膜经 CF4/ CH4等离子体处理后 ,在浸水过程中接触角降低 ,表明含氟基团从表面转移到体相中去 .在浸水最初阶段 ,lgθ～lgt(或 lgθ～t)呈线性关系 ,由直线的斜率可以计算出表面动力学衰减常数 .并且 ,表面动力学衰减常数随着 CF4质量分数的增加而增大 .
The static contact angle is decreased upon water immersion when the polymer films are treated by CF 4/CH 4 plasmas. This indicates the existence of the rotational and diffusional migration of the introduced chemical moieties containing fluorine atom from the surface into the bulk of the film. At the beginning of water immersion, lg θ is in inverse proportion to the lg t or t . The surface decay rate constant can be calculated based on the line's slope. The rate constant is fond to increase with increasing value of mass fraction of CF 4 in CF 4/CH 4 feed gas.
