Flame-retardant microcapsule phase-change material

A technology of phase change materials and microcapsules, which is applied in the direction of microcapsule preparations, heat exchange materials, microsphere preparation, etc., can solve the problems of complex process, instability, poor water resistance and solvent resistance of phosphate ester, and achieve excellent performance, Improves smoothness and avoids negative effects

Inactive Publication Date: 2015-12-02
NINGBO GREENTECH ENERGY SAVING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of this patent is complicated, and the water resistance and solvent resistance of the P-O bond in the phosphate ester are poor and unstable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Under the condition of gentle stirring, the discontinuous phase 50g fatty acid ester, 25g PhosgardC-22-R, 25g pentaerythritol tetraacrylate (PETRA) and 2.5g BPO were stirred evenly and mixed thoroughly, and the continuous phase was mixed with 400g deionized water, 2.5g polyethylene Pyrrolidone (PVP) and 2.5g sodium dodecyl sulfate (SDS) were mixed uniformly in another reactor; the above-mentioned discontinuous phase was added to the continuous phase reactor, and stirred rapidly for 5 minutes, wherein the stirring speed was 3000rpm, and then Reduce the stirring speed to 300rpm, and raise the temperature to 75°C and keep it for 1.5 hours, then adjust the temperature to 90°C and keep it for 4 hours; stop heating and cool down to room temperature naturally; take out the suspension of microcapsule phase change material , and washed three times to remove unreacted monomers and uncoated monomers, and dried in an oven at 50°C for 48 hours to obtain a flame-retardant microcapsule...

Embodiment 2

[0022] Under the condition of gentle stirring, the discontinuous phase 50g fatty acid ester, 8g olefinic phosphonate, 8g pentaerythritol tetraacrylate (PETRA) and 0.3g BPO were stirred evenly and mixed thoroughly, and the continuous phase was mixed with 400g deionized water, 3.3g poly Vinyl alcohol (PVA) and 3.3g sodium dodecyl sulfate (SDS) were mixed evenly in another reactor; the above discontinuous phase was added to the continuous phase reactor, and stirred rapidly for 40 minutes, wherein the stirring speed was 3000rpm, and then Reduce the stirring speed to 300rpm, and raise the temperature to 75°C and keep it for 1.5 hours, then adjust the temperature to 90°C and keep it for 4 hours; stop heating and cool down to room temperature naturally; take out the microcapsule phase change material suspension, and washed 3 times to remove unreacted monomers and uncoated monomers, and dried in an oven at 50°C for 48 hours to obtain a flame-retardant microcapsule phase-change material...

Embodiment 3

[0024] In the case of gentle stirring, the discontinuous phase 50g fatty acid ester, 6.25g PyrpvatesCP, 6.25g pentaerythritol tetraacrylate (PETRA) and 0.36g BPO were stirred evenly and mixed thoroughly, and the continuous phase was 310g deionized water, 2.1gSpan-80 and 2.1 g sodium dodecylbenzene sulfonate (SDBS) was mixed evenly in another reactor; the above discontinuous phase was added to the continuous phase reactor, stirred rapidly for 20 minutes at a stirring speed of 3000rpm, and then the stirring speed was reduced to 300rpm , and raise the temperature to 75°C and keep it for 1.5 hours, then adjust the temperature to 90°C and keep it for 4 hours; stop the heating and cool down to room temperature naturally; take out the suspension of the microcapsule phase change material and wash it 3 times Remove unreacted monomers and uncoated monomers, and dry them in an oven at 50°C for 48 hours to obtain a flame-retardant microcapsule phase change material with a phase change enth...

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PUM

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Abstract

The invention relates to a flame-retardant microcapsule phase-change material. The flame-retardant microcapsule phase-change material is prepared from a core material, a flame-retardant wall material, an emulsifier, benzoyl peroxide (BPO) and deionized water, wherein the core material is fatty acid ester, the flame-retardant wall material is a crosslinking polymer of reactive phosphonate monomer and tetramethylol methane tetraacrylate, and the emulsifier is a mixture of nonionic surfactant and ionic surfactant. The flame-retardant microcapsule phase-change material provided by the invention has excellent performance and is safe and environment-friendly; since reactive phosphonate-modified acid ester polymer is used as the microcapsule wall material, good flame retardation effect, good water resistance and good solvent resistance are obtained, and reduction in phase change enthalpy of the phase-change material caused by an additive flame retardant can be avoided; and since aliphatic ester is used as a phase-change material, better thermal stability and chemical stability are obtained, and a heat release rate is lower.

Description

technical field [0001] The invention relates to a flame-retardant microcapsule phase-change material, which belongs to the technical field of energy-saving materials. Background technique [0002] The world's energy is becoming increasingly tense, and phase change materials have gradually entered the field of energy conservation and become a research hotspot. The technology of using phase change latent heat of phase change materials (PhaseChangeMaterial, PCM) to store thermal energy has the advantages of high energy storage density, approximately constant temperature in the heat storage and release process, and easy control of the process. It is widely used in energy-saving materials in the fields of heat storage and temperature control. , especially in the field of construction has a wide range of applications. Organic phase change materials are a focus of research on phase change materials in recent years. The phase change process is stable and the cycle is good, which ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K21/14B01J13/14
Inventor 兰培强夏抒
Owner NINGBO GREENTECH ENERGY SAVING TECH
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