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Thermosensitive color changing material, thermosensitive color changing material microcapsule and preparation method of thermosensitive color changing material microcapsule

A technology of heat-sensitive discoloration and microcapsules, applied in the chemical industry, can solve the problems of discontinuous operation, deterioration of color and difficulty in storage, etc., and achieve the effects of reducing the impact on the human body and the environment, fast discoloration and fading, and obvious effects

Inactive Publication Date: 2018-01-05
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Heat-sensitive color-changing materials are easy to react with external environmental factors such as water, and their physical and chemical properties are prone to change without protection. The application of microencapsulation technology solves this problem. Heat-sensitive microcapsule technology can not only solve conventional thermal Sensitive materials are not easy to store, easy to be affected by the environment, deterioration and color development, and make up for the disadvantages of pressure-sensitive microcapsules being unstable during storage
[0004] The process of microencapsulation has strict requirements on temperature and pH value, and the performance of microcapsules cannot be fully guaranteed
After each microencapsulation is completed, the test for its performance is more complicated
In actual operation, there is still a lack of a simple encapsulation method suitable for all capsule cores. The operation method is discontinuous, which is not conducive to linkage production, and it is not easy to recycle when the waste product is encapsulated.

Method used

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  • Thermosensitive color changing material, thermosensitive color changing material microcapsule and preparation method of thermosensitive color changing material microcapsule
  • Thermosensitive color changing material, thermosensitive color changing material microcapsule and preparation method of thermosensitive color changing material microcapsule

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preparation example Construction

[0041] The invention provides a method for preparing microcapsules of heat-sensitive color-changing materials, which consist of a core material and a wall material wrapping the core material;

[0042] Step 1) preparing the core material, which is a thermosensitive discoloration material:

[0043] Step 1.1) Add copper salt to dehydrated alcohol, stir with glass rod to make solid dissolve completely, prepare the dehydrated ethanol solution of cupric chloride dihydrate, wherein, the mass volume ratio of copper salt and dehydrated alcohol (g / ml ) is 0.5~1:2~4; the copper salt is selected from copper chloride or copper chloride dihydrate;

[0044] Step 1.2) After adding diethylammonium chloride to isopropanol, heat and stir slightly with an electromagnetic heating stirrer to dissolve it, and prepare an isopropanol solution of diethylammonium hydrochloride, wherein diethylammonium chloride The mass volume ratio (g / ml) of ammonium to isopropanol is 1-2:6-8; the mass ratio of copper ...

Embodiment 1

[0061] 1) Add 1g of copper chloride dihydrate to 2ml of absolute alcohol, stir with a glass rod to completely dissolve the solid, and prepare an absolute ethanol solution of copper chloride dihydrate;

[0062] 2) After adding 1g of diethylammonium chloride to 6ml of isopropanol, heat and stir slightly with an electromagnetic heating stirrer to dissolve it, and prepare an isopropanol solution of diethylammonium hydrochloride;

[0063] 3) After the diethylammonium chloride is completely dissolved, add the dehydrated ethanol solution of copper chloride dihydrate dropwise with a dropper, and the solution is still placed on the heating plate for continuous heating and stirring for 30 minutes during the dropwise addition;

[0064] 4) Add activated 4-5 3A molecular sieves to promote the formation of crystals; after cooling with water, bright green needle-like crystals precipitate; filter quickly, wash the precipitate with a small amount of isopropanol, and store the product in a desic...

Embodiment 2

[0073] 1) Weigh 1g of copper chloride, place it in a 50mL Erlenmeyer flask, then add 2ml of water alcohol, and stir with a glass rod to completely dissolve the solid;

[0074] 2) Weigh 1g of diethylammonium chloride into a 50mL Erlenmeyer flask, add 6ml of isopropanol, heat slightly (50°C) with an electromagnetic heating stirrer and stir to dissolve;

[0075] 3) After the diethylammonium chloride is completely dissolved, add the copper chloride solution dropwise with a dropper, and the solution is still placed on the heating plate for continuous heating (50° C.) and stirred during the dropwise addition;

[0076] 4) After adding the copper chloride solution dropwise, increase the heating temperature to 60° C. to evaporate excess solvent.

[0077] 5) When the volume of the solution is evaporated and concentrated to about 4ml, place the Erlenmeyer flask on the table to cool down slightly, then place it in an ice-water bath to cool down, and observe whether crystalline solids are ...

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Abstract

The invention discloses a thermosensitive color changing material, a thermosensitive color changing material microcapsule and a preparation method of the thermosensitive color changing material microcapsule, wherein the thermosensitive color changing material microcapsule comprises the following steps: preparing a core material, wherein the core material is a thermosensitive color changing material; preparing a wall material, wherein the wall material is a melamine resin prepolymer; and preparing the thermosensitive color changing material microcapsule. According to the thermosensitive color changing material, the thermosensitive color changing material microcapsule and the preparation method of the thermosensitive color changing material microcapsule, the influences on the human body andthe environment are greatly reduced, the operation is simple, and a prepared microcapsule product changes color and fades rapidly, has obvious effects, and has a wide application in the fields of anti-counterfeiting, textiles, printing and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a heat-sensitive color-changing material, a heat-sensitive color-changing material microcapsule and a preparation method thereof. Background technique [0002] Thermochromic materials refer to materials with thermochromic properties. Thermochromism, that is, certain substances can undergo color changes due to structural changes at specific ambient temperatures, also known as "thermochromism" or "thermochromism". There are many uses of heat-sensitive color-changing materials. At present, its scope of use is mainly in printing, paint, toys, anti-counterfeiting, textile and clothing, and daily necessities. [0003] Heat-sensitive color-changing materials are easy to react with external environmental factors such as water, and their physical and chemical properties are prone to change without protection. The application of microencapsulation technology solves t...

Claims

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Application Information

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IPC IPC(8): C09K9/00C08G12/32B01J13/02
Inventor 杨明君赵天宇吴东杰王曦牟婷王广辉罗鑫
Owner SOUTHWEST PETROLEUM UNIV
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