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Microcapsule coated phase change material and its preparation method

A technology of phase change materials and microcapsules, which is applied in the direction of microcapsule preparation, microsphere preparation, heat exchange materials, etc., to achieve the effect of comfortable indoor environment, convenient operation and energy saving

Inactive Publication Date: 2004-07-21
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] There is no report on the application of microcapsule-coated phase change materials in building interior walls

Method used

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  • Microcapsule coated phase change material and its preparation method
  • Microcapsule coated phase change material and its preparation method
  • Microcapsule coated phase change material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Emulsification of core material

[0048] Add 0.8g of NaOH, 5.3g of dispersant styrene maleic anhydride and 0.2g of emulsifier NP-10 into 100mL of deionized water as a dispersion medium, and hydrolyze for 2 hours at 30-50°C to make the pH = 4.5, then add 32g of core material phase change material lauryl alcohol, mechanically stir at a speed of 1000r / min, and emulsify for 10min, so that the dispersed particle size of the core material reaches 10-20 μm, and the core material emulsion is obtained.

[0049] (2) Preparation of wall material prepolymer

[0050] Add 20 g of 37% formaldehyde aqueous solution and 50 g of deionized water to 20 g of melamine, adjust the pH to 8, heat to 70° C., and keep warm for 2 hours to prepare a melamine-formaldehyde prepolymer aqueous solution.

[0051] (3) The first layer of cladding of the wall material

[0052] Divide the melamine-formaldehyde prepolymer aqueous solution prepared above into 2 equal parts for later use; then pour the h...

Embodiment 2

[0059] (1) Emulsification of core material

[0060] Add 0.8g of NaOH, 5.3g of dispersant ethylene maleic anhydride and 0.2g of emulsifier NP-10 into 100mL of deionized water as a dispersion medium, and hydrolyze it for 2 hours at 30-50°C to make it pH = 4, then add 32g of core material phase change material lauryl alcohol, mechanically stir at a speed of 2000r / min, and emulsify for 2min, so that the dispersed particle size of the core material reaches 1-5 μm, and the core material emulsion is obtained.

[0061] (2) Preparation of wall material prepolymer

[0062] Add 20 g of 37% formaldehyde aqueous solution and 50 g of deionized water to 20 g of melamine, adjust the pH to 8, heat to 70° C., and keep warm for 2 hours to prepare a melamine-formaldehyde prepolymer aqueous solution.

[0063] (3) The first layer of cladding of the wall material

[0064] Divide the melamine-formaldehyde prepolymer aqueous solution prepared above into 2 equal parts for later use; then pour the hom...

Embodiment 3

[0071] (1) Emulsification of core material

[0072] Add 0.96g of NaOH, 6.4g of dispersant styrene maleic anhydride and 0.2g of emulsifier NP-10 into 100mL of deionized water as a dispersion medium, and hydrolyze for 2 hours under the condition of 30-50°C to make the pH = 5. Add 32g of core material phase change material lauryl alcohol, stir mechanically at a speed of 2000r / min, and emulsify for 8 minutes, so that the dispersed particle size of the core material reaches 1-5 μm, and the core material emulsion is prepared.

[0073] (2) Preparation of wall material prepolymer

[0074] Add 20 g of formaldehyde aqueous solution and 50 g of water to 20 g of melamine, adjust the pH to 8, heat to 70° C., and keep warm for 2 hours to prepare a melamine-formaldehyde prepolymer aqueous solution.

[0075] (3) The first layer of cladding of the wall material

[0076] Divide the melamine-formaldehyde prepolymer aqueous solution prepared above into 2 equal parts for later use; then pour the...

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Abstract

A microsoftgel coated phase changing material to be plastered on the inner surface of wall for regulating indoor temp is prepared from phase changing material as core, polymer as coating, emulsifier, disperser and deionized water through polymerizing reaction. Its advantages are compact structure and long service life.

Description

technical field [0001] The invention belongs to a functional composite material and a preparation method thereof, in particular to a microcapsule-coated phase-change material and a preparation method thereof. Background technique [0002] Since National Cash Register of the United States used microcapsule technology to make the first generation of carbonless copy paper in 1954, microcapsule technology has been widely used in chemical, mechanical, photographic, computer, petroleum, pesticide, pharmaceutical and military fields. The use of microcapsule technology to coat phase change materials to prepare phase change heat storage microcapsules has been applied in different fields: [0003] For example, "M Farid, W J Kong, Underfloor heating with latent heat storage, ProcInstn Mech Engrs, 2001, 601-609" reported the use of phase change material heat storage microcapsules, but the phase change material needs to be used in a specific container. (PCM, phase change material) is ap...

Claims

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Application Information

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IPC IPC(8): B01J13/02C09K5/02
Inventor 王立新任丽苏峻峰梁金生梁广川
Owner HEBEI UNIV OF TECH
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