Investigation of binder material for the printed ITO film on PLA substrate

Abstract

In this study, we investigated the binder materials for realizing ITO printed film sensor on biodegradable plastic substrate for detecting HNS (Hazardous and Noxious Substances). ITO is known to be suitable for application as HNS sensor because it has excellent durability in marine environment[1]. Also, PLA is a type of biodegradable plastic that has natural decomposition properties, which is considered as a substrate material that is less environmentally burdened when applicated in the ocean. However, the printing paste used to make a printed film on such a substrate is generally used terpineol and ethyl cellulose, but these materials required debinding process over 200℃[2], it is difficult to applicate in PLA used in this study[3]. Therefore, in this study, we selected a binder suitable for the above purpose and conducted a study to establish a new printing process using it. printed films were fabricated using binder materials that SBR / CMC binder, N-methyl-2-pyrrolidone (NMP) based PVDF binder and glycerol based starch binder etc., then, resistivity of each film and durability about measurement environment were investigated. We also evaluated the conductivity and structural properties of the printed film using temperature variation hole measurements, XRD and SEM.