固体表面尤其是温敏性表面的湿润行为对其实际应用具有重要的影响,本文报道了聚异丙基丙烯酰胺(PNIPAM)接枝聚丙烯微孔膜表面水接触角的温敏性“黏滑”现象.扫描电镜被用于表征接枝膜表面的形貌变化,发现在PNIPAM的低临界共溶温度(LCST)以上膜表面接枝层突起较为明显.水接触角实验表明未改性聚丙烯膜表面的前进角和后退角行为正常,且随温度无明显变化,而PNIPAM接枝膜在LCST以上则出现了“黏滑”现象(stick-slip).“黏滑”行为产生的主要原因可能是在LCST以上PNIPAM链的收缩使得膜表面出现能垒,因而造成液滴三相线的“黏滑”. The wetting behavior of solid surface, especially the thermo-sensitive surface has an important influence on its practical application. In this paper, the temperature sensitivity of the surface water contact angle of poly (propylacrylamide) (PNIPAM) The results of scanning electron microscopy (SEM) were used to characterize the morphological changes of grafted film surface, and it was found that the grafting on the surface of the grafted film was more obvious at lower critical solution temperature (LCST) of PNIPAM. The advancing angle and retrogressive angle of the surface of polypropylene film were normal, and there was no obvious change with temperature. However, the sticking slip phenomenon of PNIPAM grafted film appeared above LCST. The main reason for the behavior may be that the shrinkage of the PNIPAM chain above the LCST causes an energy barrier at the membrane surface, resulting in a “slippery” three-phase line of droplets.