Resistances of Carbon Black and Polymers in Smart Paints for Temperature Sensors

Temperature sensing and control is an important factor to prevent the overheating of mechanical and electrical components in various devices. However, commercialized temperature sensors can be disadvantageous due to their limited shapes. Therefore, we propose a smart paint to solve this issue. In this study, smart paints were produced based on carbon black, and their properties were measured using thermistors. Experiments were conducted to analyze the resistance properties using carbon and four types of polymers. Through the scanning electron microscopy (SEM) images of the mixed paints, it was shown that the resistances were decreased due to the necking phenomena. Furthermore, each paint provides a different temperature coefficient depending on the polymer type.