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High temperature resistant type phase-change material micro-capsule and preparation thereof

A phase change material and high temperature resistant technology, which is applied in the field of composite materials to achieve the effects of convenient operation, low price and simple preparation process

Inactive Publication Date: 2009-03-04
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Application of this method to prepare microcapsules has not been reported at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Emulsification of the core material: Add 2 g of styrene-maleic anhydride copolymer, 0.3 g of NaOH, and 60 g of deionized water into the flask, raise the temperature to 85°C to 90°C, and stir until the resin is completely dissolved and the system becomes transparent. Take 20g of solid paraffin and add 0.4g of OP-10 into a three-necked flask, adjust the temperature to 70°C, and mechanically stir for 3 hours to obtain a core material emulsion.

[0031] (2) Preparation of wall material prepolymer: Get 5g of melamine, 9.65g of 37% formaldehyde solution, and 5g of deionized water into a three-necked flask, adjust the pH value of the system to 8-9 with triethanolamine, and react under electromagnetic stirring at 70°C to The melamine is completely dissolved, and the system is colorless and transparent to obtain an aqueous solution of melamine-formaldehyde prepolymer, and then 0.1 g of m-phenylenediamine is added and fully stirred to obtain a wall material prepolymer.

[003...

Embodiment 2

[0036] Get 2g styrene-maleic anhydride copolymer, 0.3g NaOH, 90g deionized water, 25g solid paraffin and 0.75g NP-10, prepare core material emulsion by the method for embodiment 1; Add 0.15g resorcinol to press In the melamine-formaldehyde prepolymer aqueous solution prepared in Example 1, fully mix to obtain the wall material prepolymer; use 40% acetic acid aqueous solution to adjust the pH value of the core material emulsion to 4-5, and the stirring speed is reduced to 200rpm, and the above-mentioned wall material The prepolymer is diluted with 5g of water and dropped into the core material emulsion to coat the microcapsules. After the reaction is completed, add 0.8g of urea to the system to remove free formaldehyde, and adjust the pH value of the system to 8.5. After the product is washed, filtered, and vacuum-dried, powdery high-temperature-resistant phase-change material microcapsules are obtained.

[0037] The average particle size of the microcapsules is 6.32 μm, and th...

Embodiment 3

[0039] Get 3g styrene-maleic anhydride copolymer, 0.25g NaOH, 100g deionized water, 25g solid paraffin and 0.7g Tween60, prepare the core material emulsion by the method of embodiment 1; Get 0.08g o-phenylenediamine and add according to embodiment 1. Fully mix the prepared melamine formaldehyde prepolymer aqueous solution to obtain the wall material prepolymer; use 35% acetic acid aqueous solution to adjust the pH value of the core material emulsion to 4-5, and reduce the stirring rate to 400rpm, and the above wall material prepolymer Dilute the body with 5g of water and drop it into the core material emulsion to coat the microcapsules. After the reaction is complete, add 0.5g of urea to the system to remove free formaldehyde, and adjust the pH value of the system to 8.5 with 8% NaOH aqueous solution. The product is washed, suction filtered and vacuum dried to obtain powdery high temperature resistant phase change material microcapsules.

[0040] The average particle diameter ...

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Abstract

The invention relates to a high-temperature resistant phase-change material microcapsule and a preparation method thereof which belong to the technical field of compound materials. The invention needs to solve the technical problem of providing a high-temperature resistant phase-change material microcapsule in the field of melt spinning; the components thereof counted according to weight portions include 100 portions of core phase-change material, 7 to 12 portions of dispersant, 2 to 5 portions of emulsifying agent as well as a wall material prepared by 0.3 to 0.6 portion of modified monomer and 30 to 50 portions of melamine resin. The preparation method of the high-temperature resistant phase-change material microcapsule includes the emulsification of the core, the preparation of the prepolymer of the wall material, the preparation of the microcapsule and the removing of free formaldehyde. The high-temperature resistant phase-change material microcapsule has higher heat stability, heat-resistance as well as uniform grain sizes and can meet the requirements of spinning fibers. The preparation technique is simple, is conveniently operated, can save energies and is environmental friendly; the product is easy for industrialization production and has a better market prospect.

Description

technical field [0001] The invention relates to a high-temperature-resistant phase-change material microcapsule and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] In recent years, the microencapsulation technology of phase change materials has received extensive attention and has been applied in the fields of fibers, clothing, coatings and composite materials. Microcapsules can provide enthalpy change sites for phase change materials, play a role in sealing phase change materials, and greatly improve the processing performance of phase change materials. In the field of spinning, since melt-spun fibers require a temperature as high as 300°C, the preparation of high-temperature thermally stable microcapsules has become an urgent problem to be solved. [0003] The application field of microcapsules depends on the physical and chemical properties of its wall materials. Microcapsule wall materials used for pha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/18D01F1/10
Inventor 李元杰王峰
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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