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RGO-키토산 복합체를 이용한 하이드로겔의 합성과 종이기반 이산화질소 검출 센싱 플랫폼 개발 응용
박현준(Hyunjun Park),김웅(Woong Kim),박주형(Joohyung Park),김우창(Woochang Kim),김민우(Minwoo Kim),김치현(Chihyun Kim),이원석(Wonseok Lee),박진성(Jinsung Park) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
In this study, we proposed that conductive composites like hydrogel using RGO and Chitosan. We are synthesized and detected a toxic gas, nitrogen dioxide (NO₂), using them. Heat the Graphene Oxide solution (GO) with ascorbic acid and reduced it to reduced graphene oxide(rGO). Then using acetic acid to make it acidic condition and add the chitosan powder to the rGO solution. When the chitosan powder is dissolved in acidic condition, it has the properties of gelation. The synthesized rGO gel has its own gel property, which is advantageous in creating and synthesizing structures by the desired mask. In particular, it has good adhesion with paper, so it can be used as a gas sensor to measure NO₂ by coating on paper. We confirmed that the detection result of NO₂ concentration range from 1 to 100 ppm. Conventional NO2 detection sensors have added nano conductive materials (nanowires, nanoparticles etc.) that increase conductivity to rGO, but the hydrogel condition has sufficient conductivity and advantage that can be manufactured from customizable sensors that are independent of shape.