课题组首次通过化学相转化一步法制备具有超亲水/超疏水两面性的PVDF膜,两侧接触角差大于140度,远大于目前文献报道值。控制亲水性组分相转化过程中的inside-out迁移路径,在膜底层引入隔水涂层,使得亲水组分发生单向迁移,即只有在上表面发生迁移聚集,而膜的下表面迁移富集受限制。从而产生浸润性的两面性差异。PVDF的Janus特性使其能够分离油包水和水包油乳液。
Tiantian Li, Fu Liu*, Shaofei Zhang, Haibo Lin, Jianqiang Wang, Janus PVDF membrane with extremely opposite wetting surfaces via one single step unidirectional segregation strategy, ACS Applied Materials & Interfaces, 2018, in press.