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两亲接枝共聚物PS-g-PEO膜的制备及其表面浸润性

, PP. 100-103

Keywords: 两亲接枝共聚物,PS-g-PEO,表面浸润性,可逆

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Abstract:

采用模板法制备了具有微纳米复合结构的聚苯乙烯接枝聚氧乙烯(PS-g-PEO)共聚物膜.将其与滴涂法制备的平滑膜进行比较,考察了PEO含量、表面形貌对共聚物膜表面浸润性产生的影响.将制备的膜进行退火及水浸泡处理后测其接触角变化.退火和水浸泡处理可以使共聚物膜表面浸润性发生可逆改变,退火后共聚物膜表面接触角增大,水浸泡后接触角减小.其中退火后的PEO含量为40.9%的共聚物平滑膜进行水浸泡处理后,膜表面接触角由65.1°减小到53.3°,而对应的共聚物粗糙膜表面接触角由150.0°减小到60.9°,实现了超疏水到亲水的转变.不同处理条件下PEO链段聚集状态不同,退火及水浸泡处理使PEO链段发生翻转,导致膜表面浸润性发生可逆改变.

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