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114th General Meeting of Korean Chemical Society Acid sensor based on Chitosan-graft-Polyaniline copolymer film

Submission Date :
8 / 28 / 2014 , 15 : 16 : 25
Abstract Number :
114082810718
Presenting Type:
Poster Presentation
Presenting Area :
고분자화학
Authors :
이상용, 최동철, 손용근*
성균관대학교 화학과, Korea
Assigned Code :
POLY.P-58 Assigend Code Guideline
Presenting Time :
10월 15일 (수요일) 16:00~19:00
Polyaniline(PANI) is a conjugated polymer which shows good electrical conductivity through acid/base doping process. Thus PANI can used acid or base sensor. But PANI has known to be poor in solvent solubility. So that it is very difficult to make independent PANI film. Therefore, we tried to use chitosan(CS), to make CS-g-PANI copolymer. Because CS can povide good mechanical and solubility properties. We identified formation of copolymer by a preferable X-ray diffraction (XRD), Scanning Electron Microscope (SEM), FT-IR. Resistance of copolymer is observed using a home made 4-point probe. We have fabricated copolymer to improve mechanical properties and processibility. The copolymer can be easily used for film-forming. As a substrate a piece of PET film on which 2-lines of Ag paste were coated was used. We drop acid solution on sensor surface, then the resistance change of the copolymer was observed. As a result, resistance has decrease up to 1/500 than the value obtained before proton dopping. In conclusion, CS-g-PANI copolymer could be applied in the fabrication of acid sensor. This work was supported by the Component and Material Technology Development Program (No.10046641, Development of Electronic Ink and Coating Material for Leak Monitoring of the Hazardous Chemicals ) funded by the Ministry of Trade, industry & Energy (MOTIE, Korea)