Reversible color-changing material and reversible temperature-indicating coating, and preparation methods and applications thereof

Abstract

The invention relates to a reversible color-changing material and a reversible temperature-indicating coating, and preparation methods and applications thereof. The reversible color-changing materialcomprises crystal violet lactone, bisphenol A and a color developing agent, and the color developing agent is stearic acid or naphthalene. According to the reversible color-changing material, the combination of crystal violet lactone, bisphenol A and the specific color developing agent is innovatively adopted, so that the reversible color-changing material has a proper temperature indicating range, is high in temperature indicating temperature point, obvious in color change and single in color changing, and can be recognized by naked eyes to achieve the purpose of warning temperature. The color of the temperature-indicating coating is reversible, so that the temperature-indicating coating can be repeatedly used, the reversible color-changing material has few raw materials, the economic cost can be saved, the effect is obvious, and the practicability is higher.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a reversible color-reversing material, a reversible temperature-indicating coating and a preparation method and application thereof. Background technique [0002] The safe operation of the power system is related to the development of the entire national economy and the stability of people's lives. However, there are many factors that affect the safe operation of the power system, and one of the important aspects is the safe operation of the electrical equipment itself. Because most of the electrical equipment adopts a closed structure, the heat dissipation is poor, the heat gradually accumulates, and the local temperature of the equipment rises. Excessive high temperature endangers the normal operation of the equipment and even reduces the service life of the equipment. Intuitive and effective monitoring of the temperature of the equipment is not only related to the life of th...

AI Technical Summary

Problems solved by technology

Currently disclosed color-changing coatings mainly include the following types: 1) Reversible color-changing coatings made of isocyanate curing agent and hydroxyl resin or amino resin containing active hydrogen at a mass ratio of 1:3, and the color-changing temperature range of temperature sensitivity is -5 ℃~70℃, there are 14 temperature points, the colors are dark green, medium green, malachite green, grass green, black, sea blue, royal blue, golden yellow, golden red, bright red, rose red, bright yellow, brown black, pink, orange red , but the problem with this scheme is that the temperature display temperature point is low, and the colors between adjacent temperature points are similar, and the change is not obvious, which cannot reflect the heating fault problem of power distribution equipment

2) Polyurethane resin, thermosetting acrylic resin and full methyl etherified amino resin are used as film-forming substances, and temperature-sensitive microcapsules and vanadium dioxide are used as thermochromic materials. The color-changing coatings produced have good high temperature resistance, Aging resistance and flame retardancy, but the discoloration temperature ranges from 30°C to 80°C, the range is too large, the discoloration is not obvious, and it is not conducive to the fault monitoring of power distribution equipment

In addition, infrared temperature sensors are used to realize real-time monitoring of the internal temperature of the substation. When the temperature exceeds the safe value, the control box starts the fan to cool down the equipment, which can improve the safety of power transmission and transformation equipment. However, this technology The problem with the solution is that the installation and implementation are complicated, and it is impossible to detect the heating fault temperature point of the power transmission and transformation equipment in a targeted manner. The sensor detection is greatly affected by environmental factors, and the temperature can only be monitored for local points.