热敏智能径迹膜的研制

Preparation of thermosensitive intelligent track membrane

以N -异丙基丙烯酰胺热敏材料为单体 ,核径迹微孔膜为基材 ,用过氧化预辐照接枝技术研制出能控制开关的热敏智能径迹膜。考察了预辐照剂量、接枝温度、单体浓度和反应时间等因素对接枝的影响 ,以及膜孔开闭动态变化。亚微米级孔径上极薄的热敏接枝层 ,溶胀与收缩迅速 。

Using N-isopropyl-amide (NIPAAm) thermosensitive function material as monomer and nuclear track microporous membrane (NTMM) as baseline material, a thermosenstitive intelligent track membrane (TsITM) was prepared by the over-oxidization and pre-irradiation grafting techniques. The TsITM can be used to make a micro-switch controlled by temperature. The effects of pre-irradiation dose, grafting temperature, monomer concentration and reaction time on the grafting yield were investigated, and the dynamic range of responsive grafted track pores were observed. To obtain sub-micron responsive grafted track pores only a very thin thermosensitive layer is needed. The TsITM pores are capable of swelling and shrinking rapidly and respond more sensitively to temperature.