PAM-PAA microgel inverse opal photonic crystal and pH response  

作　　者：Yong Qiang He Xiao Dong Wang Jian Ying Wang Yan Feng Yong Qiang Zhao Xiu Dong You 

机构地区：[1]School of Science, Tianjin University, Tianjin 300072, China [2]Insititute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, China

出　　处：《Chinese Chemical Letters》2007年第11期1395-1398,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.50473044).

摘　　要：The colloidal crystal template or opal with a closed-packed face-centered cubic （fcc） lattice was prepared from monodisperse polystyrene （PS） spheres by vertical sedimentation. The template provided void space for infiltration of monomer precursor composed of acrylate acid, acrylamide and ammonium-persulfate, as well as microgel from the subsequent copolymerization. The sample was immersed in dimethylbenzene for completely removing PS spheres to form PAM inverse opal hydrogels （IOHPAM） or PAM/PAA inverse opal hydrogels （IOHPAM/PAA） photonic crystals. The PS spheres were replaced by air spheres, which interconnected each other through the windows. The study of responses to pH show that there are two peaks for both IOHPAM and IOHPAM/PAA films, but the IOHPAM/PAA peaks shift to higher pH, and the peaks are independent with the AA content.The colloidal crystal template or opal with a closed-packed face-centered cubic （fcc） lattice was prepared from monodisperse polystyrene （PS） spheres by vertical sedimentation. The template provided void space for infiltration of monomer precursor composed of acrylate acid, acrylamide and ammonium-persulfate, as well as microgel from the subsequent copolymerization. The sample was immersed in dimethylbenzene for completely removing PS spheres to form PAM inverse opal hydrogels （IOHPAM） or PAM/PAA inverse opal hydrogels （IOHPAM/PAA） photonic crystals. The PS spheres were replaced by air spheres, which interconnected each other through the windows. The study of responses to pH show that there are two peaks for both IOHPAM and IOHPAM/PAA films, but the IOHPAM/PAA peaks shift to higher pH, and the peaks are independent with the AA content.

关 键 词：Photonic crystal pH response PAM/PAA OPAL Inverse opal hydrogel 

分 类 号：O6[理学—化学]