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Preparation and Stability of PEGDA/GO Conductive Materials by DLP 3D Printing
Men Thi Hong Nguyen,Su Yeon Kim,Tae Hyeon Jeong,Jong Hoon Kim,Hyoung Sic Cho,Tai Hwan Ha,Sang Jung Ahn,Young Heon Kim 대한금속·재료학회 2022 ELECTRONIC MATERIALS LETTERS Vol.18 No.3
Stable composites of water-dispersed graphene oxide (GO) and UV-cured acrylic resin, poly (ethylene glycol) diacrylate(PEGDA), were prepared to make printed conductive patterns using a digital light processing (DLP) three-dimensional(3D) printing method. The targeted structures were successfully printed by DLP 3D printing and the electrically conductiveproperties were obtained by reducing the insulating GO in the composites to reduced GO by chemical and thermal reductionprocesses. Three basic reduction procedures, pre-thermal, pre-chemical, and post-thermal reduction, were performedto introduce a high conductivity into a printed structure and the lowest resistance was achieved by the pre-thermal reductionin our study. The stability of the printed structures was also evaluated by monitoring the change in resistance with time. Thestrategy pursued by photopolymerization gives the outstanding features of printed structures for extensive applications inthe manufacturing of electronic and sensing devices.