Photoresponsive properties of poly(N-isopropylacrylamide) hydrogel partly modified with spirobenzopyran.
Photoresponsive properties of poly(N-isopropylacrylamide) hydrogel partly modified with spirobenzopyran.
复制标题
DOI：
10.1021/la052899
复制
发表时间：
2006-03
期刊：
影响因子：
--
通讯作者：
K. Sumaru;Katsuhide Ohi;T. Takagi;T. Kanamori;T. Shinbo
中科院分区：
文献类型：
--
作者：
K. Sumaru;Katsuhide Ohi;T. Takagi;T. Kanamori;T. Shinbo
通过N-异丙基丙烯酰胺、具有螺苯并吡喃残基的乙烯基单体和交联剂的自由基共聚制备光响应性水凝胶。通过光响应收缩和电导变化的观察，证实了在酸性条件下的水凝胶在蓝光照射下表现出剧烈和快速的体积收缩和质子解离。此外，为了研究其在传质控制中的应用，我们通过将这种光响应性水凝胶引入多孔膜的表面来制备光响应性和温度响应性门膜。作为对液体的膜渗透的光控制的第一个证明，观察到响应于蓝光照射，其对1 mM HCl水溶液的渗透性增加2倍，并且该渗透性的光响应被证实是可重复的。
A photoresponsive hydrogel was prepared by radical copolymerization of N-isopropylacrylamide, a vinyl monomer having a spirobenzopyran residue and cross-linker. By the observation of photoresponsive shrinking and the conductance change, it was confirmed that the hydrogel in an acidic condition exhibited drastic and rapid volume shrinkage and proton dissociation when it was irradiated with blue light. Further, to examine its application to the mass transfer control, we prepared a photo- and thermoresponsive gate membrane by introducing this photoresponsive hydrogel to the surface of a porous membrane. As the first demonstration of the photocontrol of membrane permeation for liquid, it was observed that its permeability for 1 mM HCl aqueous solution increased by 2 times in response to the blue light irradiation, and this photoresponse of the permeability was confirmed to be repeatable.