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Phase change microcapsule coated with double-layer wall materials and having photochromic function and preparation method of phase change microcapsule

A phase-change microcapsule and wall material coating technology, which is applied in the direction of microcapsule preparation, microsphere preparation, dyeing method, etc., can solve the problems of low heat resistance and lack of application space, and achieve good thermal stability and good transparency. The effect of optical properties and good mechanical properties

Pending Publication Date: 2022-04-12
武汉中科先进材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN202010363129.4 provides an organic / inorganic double-shell photochromic microcapsule and its preparation method, but it does not combine phase-change materials as core materials, lacking more application space, and, because the inner shell The body contains long-chain saturated hydrocarbons and long-chain saturated fatty acids, so the heat resistance is low, and generally does not exceed 80°C (the melting point of long-chain saturated hydrocarbons and long-chain saturated fatty acids)

Method used

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  • Phase change microcapsule coated with double-layer wall materials and having photochromic function and preparation method of phase change microcapsule
  • Phase change microcapsule coated with double-layer wall materials and having photochromic function and preparation method of phase change microcapsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 70 g of ethyl palmitate, 1 g of spirooxazine, 15 g of isophorone diisocyanate (IPDI), and 10 g of hexamethylene diisocyanate (HDI) and stir evenly to obtain an oil phase solution.

[0029] Add the above oil phase solution into the aqueous solution of styrene-maleic anhydride block copolymer and stir at high speed to form an oil-in-water O / W emulsion, slowly add 8g of diethylenetriamine, 2g of ethylene glycol and catalyst into the emulsion Raise the temperature to 60°C and keep stirring to form a polyurea-polyurethane copolymer wall material on the emulsion droplet interface, then raise the temperature to 95°C for 3 hours to react.

[0030] Fully dissolve 5g of sodium metasilicate in 20g of deionized water, cool the emulsion to 50°C, add sodium metasilicate aqueous solution and mix well, add 50ml of 0.1mol / L sulfuric acid solution to the emulsion by titration and use NaOH to adjust the pH value Adjust to 3.5, raise the temperature to 75°C and keep stirring for 2 ho...

Embodiment 2

[0035] Weigh 70g of ethyl palmitate, 2g of spirooxazine, 10g of isophorone diisocyanate (IPDI), 10g of hexamethylene diisocyanate (HDI), fully dissolve and stir evenly.

[0036] Add the above oil phase solution into the aqueous solution of styrene-maleic anhydride block copolymer and stir at high speed to form an oil-in-water O / W emulsion, slowly add 7g of ethylenediamine, 3g of glycerol and catalyst to the emulsion and then raise the temperature Keep stirring at 50°C to form a polyurea-polyurethane copolymer wall material on the emulsion droplet interface, then raise the temperature to 95°C for 5 hours.

[0037] Fully dissolve 10g of sodium metasilicate in 40g of deionized water, cool the emulsion to 60°C, add sodium metasilicate aqueous solution and mix well, add 100ml of 0.1mol / L sulfuric acid solution to the emulsion by titration and use NaOH to adjust the pH value to 3.0, the temperature was raised to 70°C and kept stirring for 3 hours.

[0038] After the emulsion is coole...

Embodiment 3

[0041] Weigh 75g of ethyl palmitate, 0.8g of spirooxazine, 10g of hexamethylene diisocyanate (HDI), and 5g of m-xylylene diisocyanate (XDI), fully dissolve and stir evenly.

[0042] Add the above oil phase solution into the aqueous solution of styrene-maleic anhydride block copolymer and stir at high speed to form an oil-in-water O / W emulsion, slowly add 8g of diethylenetriamine, 1g of ethylenediamine, 1 4-butanediol (BDO) 1g and the catalyst are then heated to 55°C and kept stirring to form a polyurea-polyurethane copolymer wall material on the emulsion droplet interface, and then heated to 95°C for 4 hours.

[0043] Fully dissolve 15g of sodium metasilicate in 50g of deionized water, cool the emulsion to 55°C, add sodium metasilicate aqueous solution and mix well, add 150ml of 0.1mol / L sulfuric acid solution to the emulsion by titration and use NaOH to adjust the pH value to 3.0, the temperature was raised to 75°C and kept stirring for 3 hours.

[0044] After the emulsion i...

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Abstract

The invention relates to a double-layer wall material coated phase change microcapsule with a photochromic function and a preparation method of the double-layer wall material coated phase change microcapsule. The microcapsule is composed of a double-layer capsule wall and a capsule core, the surface wall material is a deposited silicon dioxide coating layer, and the internal wall material is a polyurea-polyurethane copolymer. The capsule core material is a core material and is made of a photochromic high polymer material and a phase change material. The preparation method provided by the invention has the characteristics of rapidness and simplicity in preparation, and the obtained phase change microcapsule has good thermal stability and compactness and is completely free of aldehydes harmful to health; meanwhile, the capsule wall is thin and has good light transmission performance, so that ultraviolet light or sunlight can penetrate through the capsule wall without hindrance and irradiate the capsule core color-changing material to promote the photochromic effect of the capsule core color-changing material. The phase change point of the prepared microcapsule is about 28 DEG C and is close to the most suitable temperature of a human body, and the phase change point of the prepared microcapsule is about 28 DEG C and is close to the most suitable temperature of the human body, and the microcapsule has the function of resisting ultraviolet radiation.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a phase-change microcapsule with photochromic function coated with double-layer wall materials and a preparation method thereof. Background technique [0002] Microcapsules are micro-containers with polymer or inorganic walls. Through microcapsule granulation technology, solids, liquids or gases can be embedded and sealed into a solid microcapsule. Phase change materials are wrapped in microcapsules. When the phase transition temperature can reach the comfortable temperature required by the human body, adding such microcapsule phase change materials to textiles through spinning or coating methods can make the spinning products have adjustable The performance of thermal energy storage creates a comfortable temperature environment between the skin and clothing. In some scenarios and conditions, there is a need to simultaneously coat photosensitive materials a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14C09K9/02D06P1/00D06P1/52D06P1/642D06P1/651D06P1/673
Inventor 康翼鸿喻学锋何睿邓宇昊黄湛艾丹
Owner 武汉中科先进材料科技有限公司