Preparation method of reversible temperature indicating patch for temperature self-detection of power equipment and its properties

Abstract

Abstract The problem of thermally induced defects in power equipment is prominent, affecting the safe and stable operation of the power grid. To detect abnormal heating in time, a reversible temperature-indicating patch measurement for temperature self-detection of power equipment is proposed, and its performance is analyzed and studied. The results show that the reversible thermochromic patch prepared with heat-sensitive red as the hidden colorant, dodecyl gallate as the color rendering agent, and tetradecane as the solvent has the color change characteristic of “light color at low temperature and deep color at high temperature”, and its color-changing temperature interval is 42°C ∼ 52°C. The color-changing performance of the materials with different quality ratios is different, from which the optimal ratio of the color-changing materials is selected as thermochromic red: lauryl gallate: tetradecanol=1:7:30. To facilitate the application of the color-changing materials on-site, the color-changing materials are encapsulated by melt adsorption sealing technology, and the temperature indicating patches with good color-changing reversibility are prepared. The research results can provide a reference for the field application of reversible color-changing materials for temperature self-detection of power equipment.