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Low-temperature reversible thermochromic coating and preparation method thereof

A thermal-induced discoloration and coating technology, applied in the direction of coating, etc., can solve the problems of long crystal transformation time, obvious hysteresis, and long recoloring time, and achieve the effects of improving sensitivity, convenient use, and improving thermal conductivity

Inactive Publication Date: 2017-12-15
许炳初
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the crystal transformation time is longer, so the required recoloring time is longer, and the hysteresis phenomenon is obvious
[0005] 2. Gain and loss of crystal water: the rise and fall of temperature leads to the process of color change due to the gain and loss of crystal water carried by the substance
So PbCrO 4 The color change of type thermochromic paint is obvious, it can be used, and the accuracy is high, but the color change temperature is above 1000°C, which belongs to high temperature type

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A low-temperature reversible thermochromic coating, comprising the following components by weight: 15 parts of UV curable glue, 6 parts of thermochromic microcapsules, 4 parts of glass fiber, 5 parts of graphene, 5.5 parts of light calcium carbonate, and talcum powder 7.5 parts, anti-aging agent 4.4, 0.3 parts of double (2.2-dimethylbenzyl) diphenylamine, 0.8 parts of dispersant, 0.6 parts of leveling agent polydimethylsiloxane, 0.5 parts of defoamer tributyl phosphate, 60 parts of acetone;

[0027] The particle size range of the thermochromic microcapsules is 1 μm, the discoloration temperature range is 37.5-38.3°C, the color is colorless when the external temperature is higher than the upper limit of the discoloration temperature, and the color is dark blue when the external temperature is lower than the lower limit of the discoloration temperature;

[0028] The carbon to oxygen ratio of described graphene is 20:1, and the surface area of ​​graphene is 1260m 2 / g;

...

Embodiment 2

[0033] A low-temperature reversible thermochromic coating, comprising the following components by weight: 12 parts of UV curable glue, 4 parts of thermochromic microcapsules, 3 parts of glass fiber, 4 parts of graphene, 3 parts of light calcium carbonate, and talcum powder 4 parts, 0.2 parts of anti-aging agent N-N`-diphenyl-p-phenylenediamine, 0.1 part of dispersant, 0.3 parts of leveling agent polydimethylsilane, 0.2 parts of defoaming agent isooctyl alcohol, 50 parts of acetone;

[0034] The particle size range of the thermochromic microcapsules is 1.5 μm, the discoloration temperature range is 37.6-38.5°C, the color is colorless when the external temperature is higher than the upper limit of the discoloration temperature, and the color is dark blue when the external temperature is lower than the lower limit of the discoloration temperature;

[0035] The carbon-oxygen ratio of described graphene is 80:1, and the surface area of ​​graphene is 1860m 2 / g;

[0036] The prepar...

Embodiment 3

[0040] A low-temperature reversible thermochromic coating, comprising the following components by weight: 20 parts of UV curable glue, 8 parts of thermochromic microcapsules, 5 parts of glass fiber, 7 parts of graphene, 6 parts of light calcium carbonate, and talcum powder 10 parts, anti-aging agent N-phenyl-N`-isopropyl-p-phenylenediamine 0.5 parts, dispersant 1.2 parts, leveling agent polyester modified organosiloxane 0.8 parts, defoaming agent dimethyl silicone oil 0.6 parts, 75 parts of acetone;

[0041] The particle size range of the thermochromic microcapsules is 0.8 μm, the discoloration temperature range is 37.2-38.6°C, the color is colorless when the external temperature is higher than the upper limit of the discoloration temperature, and the color is dark blue when the external temperature is lower than the lower limit of the discoloration temperature;

[0042] The carbon-oxygen ratio of described graphene is 100:1, and the surface area of ​​graphene is 2160m 2 / g; ...

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Abstract

The invention belongs to the field of thermal functional materials and particularly relates to a low-temperature reversible thermochromic coating and a preparation method thereof. The low-temperature reversible thermochromic coating is prepared from components in parts by weight as follows: 8-25 parts of UV curing glue, 3-8 parts of thermochromic microcapsules, 2-5 parts of glass fibers, 3-8 parts of graphene, 2-6 parts of light calcium carbonate, 2-10 parts of talcum powder, 0.01-0.5 parts of an anti-aging agent, 0.01-1.5 parts of a dispersing agent, 0.2-0.8 parts of a leveling agent, 0.1-0.6 parts of a defoaming agent and 50-75 parts of a solvent. According to the low-temperature reversible thermochromic coating, with the addition of graphene, overall thermal conductivity coefficient of the coating is increased, and sensitivity of the thermochromic microcapsules is improved; with adoption of the UV curing glue, glue curing only needs UV irradiation, and the coating is convenient to use.

Description

technical field [0001] The invention belongs to the field of thermal functional materials, in particular to a low-temperature reversible thermochromic coating and a preparation method thereof. Background technique [0002] Thermochromic materials refer to functional materials whose visible absorption spectrum changes when some compounds or mixtures are heated or cooled. It has the characteristic of changing color with temperature. This material is a thermal memory functional material, which is widely used in various fields such as industry, textile, military, printing, medical care, diagnosis, construction, anti-counterfeiting marks, daily decoration, aerospace and so on. Thermochromic materials can be divided into two categories: irreversible thermochromic materials and reversible thermochromic materials. Reversible thermochromic material means that when the material is heated to a certain temperature or temperature range, its color will change obviously, showing a new col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09D5/00
CPCC08K3/04C08K3/34C08K7/14C08K9/10C08K2003/265C09D5/00
Inventor 许炳初
Owner 许炳初