Development of photo-responsive actuators and their application to intelligent micropump

合成了主链上含有光敏偶氮苯基团的聚酰胺酸凝胶。结果表明，405 nm光通过反式异构化导致凝胶局部体积减小，532 nm光照射增加了凝胶的体积，凝胶作为光敏泵，在蓝光照射下释放溶剂，在可见光照射下吸入溶剂。在一个脉动下的溶剂释放量估计为1×10~(-10)~(-10)·m~(-3)。用四官能团交联剂合成的聚合物凝胶的溶剂释放量比用三官能团交联剂合成的聚合物凝胶的溶剂释放量大20%。

Poly(amide acid) gels containing photosensitive azobenzene groups in the main chain have been synthesized. It was found that 405 nm light induced a decrease of local volume due to trans-cis isomerization and 532 nm light irradiation increases a volume of gel.The gel works as a photosensitive pump that discharge solvent by blue laser irradiation and aspirate solvent under visible light irradiation. The discharge amount of solvent under one pulsating is estimated to be 1×10^<-10> m^3. The discharge amount of solvent from polymer gels synthesized with tetrafunctional crosslinker is 20% larger than that of polymer gels synthesized by use of trifunctional crosslinker.