107 / 2022-03-13 16:23:36

Study on the reversible thermochromic microcapsules/epoxy resin composites and its characteristics

microcapsules,thermochromic

The monitoring of thermal faults plays an important role in the safe and stable operation of electrical equipment. At present, infrared temperature measurement and image online monitoring are unable to detect thermal hazards in small parts of the line in a timely manner, and thermochromic coating is a simple monitoring method with the obvious indication for the rapid detection of thermal faults. In this paper, a functional thermochromic coating is prepared that is sensitive to temperature and uses the material's ability to change color with temperature to quickly locate overheating faults on electrical equipment. Meanwhile, the morphology and chemical composition of the insulating material is analyzed using TGA SEM and other testing methods. The color of the insulation stays brown when the temperature is below 45 ℃ and changes to red when the temperature is above 45 ℃. Following testing with a high-precision chromaticity instrument, it was found that the insulation material varied widely in color and was able to return to its original black state after cooling. The experimental results point to the obvious color change of the thermal coating and the high sensitivity of the response, in addition to the good recolorization function. By applying the thermochromic coating to the surface of the electrical equipment, the maintenance personnel can directly observe the color change of the coating with the naked eye to determine the location of faults in the electrical system in a timely manner, thus achieving precise identification and saving cost and time.