A biomass based photonic crystal made of "konjac tofu"  

作　　者：Wenxin Zhang Min Xue Kenneth J.Shea Lili Qiu Zhibin Xu Jing Fan Dan Yan Zihui Meng 

机构地区：[1]School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,China [2]Department of Chemistry,University of California Irvine,CA 92697,United States

出　　处：《Chinese Chemical Letters》2021年第1期587-590,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21874009,21804009).

摘　　要：Konjac tofu is a traditional Chinese food whose main ingredient is the water-soluble polysaccharide from konjac tubers-konjac glucomannan(KGM).Herein we report an interpenetrating double network polymeric film by crosslinking KGM and polyvinyl alcohol(PVA) with glutaraldehyde under acidic conditions.PVA was introduced into the hydrogel system as a hard skeleton,which not only maintained the biocompatibility of KGM,but also gave the hydrogel superior mechanical properties and solvent resistance.Implanting a colloidal array inside the above film,we obtained a new type of biomass based photonic crystal that is sensitive to a variety of physical and chemical stimulus,especially for methanol.This photonic crystal responds to metha nol and methanol vapo r,and has the ability to detect methanol in gasoline,which has a good application prospect.

关 键 词：Photonic crystals Konjac glucomannan HYDROGEL Interpenetrating double network Sensor 

分 类 号：O734[理学—晶体学]