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

合成了主链含光敏偶氮基团的聚酰胺酸凝胶.结果表明，405 nm光照射引起凝胶体积减小，532 nm光照射引起凝胶体积增大，凝胶作为光敏泵，在蓝光照射下排出溶剂，在可见光照射下吸入溶剂。一次脉动的溶剂排放量估计为1×10^<-10>m^3。用四官能度交联剂合成的聚合物凝胶的溶剂排放量比用三官能度交联剂合成的聚合物凝胶的溶剂排放量大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.