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A kind of polyurethane microencapsulated phase change material and preparation method thereof

A technology of polyurethane microcapsules and phase change materials, which is applied in the preparation of phase change materials encapsulated in polyurethane microcapsules, and in the field of phase change materials encapsulated in polyurethane microcapsules, which can solve the problems of poor service life, compactness and thermal stability of microcapsule shells Poor performance, high preparation price and other problems, to achieve the effect of long service life, low price and simple preparation process

Active Publication Date: 2018-12-18
上海伊纯实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a polyurethane microcapsule encapsulated phase change material, which solves the problems of poor compactness and thermal stability of the microcapsule shell in the prior art, high preparation price and poor service life

Method used

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  • A kind of polyurethane microencapsulated phase change material and preparation method thereof

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preparation example Construction

[0036] A preparation method for polyurethane microencapsulated phase-change materials, specifically implemented according to the following steps:

[0037] Step 1, prepare the first solution, mix the capsule core component and the oil-soluble monomeric polyisocyanate evenly to form the first solution, specifically follow the steps below:

[0038] Step 1.1, weighing the capsule core component and the polyisocyanate, wherein the mass ratio of the polyisocyanate to the capsule core component is 0.1-0.6:1;

[0039] The core component is the phase change material, which is a low melting point fatty acid and fatty acid ester polar compound;

[0040] The capsule core component is preferably one of methyl myristate, ethyl palmitate and butyl stearate.

[0041] Polyisocyanate can be aromatic diisocyanate, aromatic tribasic isocyanate, or their dimer or trimer, preferably isophorone diisocyanate (IPDI) and 4,4'-diphenyl Methane diisocyanate (MDI).

[0042] Step 1.2: Mix the capsule co...

Embodiment 1

[0054] Prepare the polyurethane microcapsule-encapsulated phase-change material, specifically according to the following steps:

[0055] Step 1, mix the capsule core component and polyisocyanate uniformly to form the first solution, specifically as follows

[0056] The following steps are implemented:

[0057] Step 1.1, weighing the capsule core component methyl myristate and polyisocyanate, wherein the mass ratio of the polyisocyanate to the capsule core component is 0.1:1; the polyisocyanate is selected from isophorone diisocyanate;

[0058] In step 1.2, the methyl myristate and isophorone diisocyanate weighed in step 1.1 are mixed under the condition of 10° C. higher than the melting point of the capsule core component to obtain a uniformly mixed first solution.

[0059] Step 2, preparing a droplet dispersion of the first solution;

[0060] Step 2.1, prepare a non-reactive medium solution immiscible with the first solution prepared in step 1, the non-reactive medium solut...

Embodiment 2

[0066] Prepare the polyurethane microcapsule-encapsulated phase-change material, specifically according to the following steps:

[0067] Step 1, mix the capsule core component and polyisocyanate uniformly to form the first solution, specifically as follows

[0068] The following steps are implemented:

[0069] Step 1.1, weigh the capsule core component ethyl palmitate and polyisocyanate, wherein the mass ratio of the polyisocyanate to the capsule core component is 0.5:1; the polyisocyanate is selected from 4,4'-diphenylmethane diisocyanate (MDI );

[0070] In step 1.2, mix the ethyl palmitate and 4,4'-diphenylmethane diisocyanate (MDI) weighed in step 1.1 at a temperature 10°C higher than the melting point of the capsule core component to obtain a uniformly mixed first solution.

[0071] Step 2, preparing a droplet dispersion of the first solution;

[0072] Step 2.1, prepare a non-reactive medium solution immiscible with the first solution prepared in step 1, the non-react...

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Abstract

The invention discloses a polyurethane microcapsule encapsulated phase change material, which comprises a capsule-core material and a capsule wall part encapsulated outside the capsule-core material. The capsule wall is polyurethane resin formed by reaction of multielement isocyanate and polyhydric alcoholic compounds, preferably, the capsule wall is polyurethane resin of a ternary net structure, which is formed by polymerization of binary isocyanate and polyhydric alcoholic compounds containing three degrees of functionality. The material disclosed by the invention can be used for solving the problem of poor compactness and heat stability, high preparation price and short service life of a microcapsule shell in the prior art. The invention also discloses a preparation method of the polyurethane microcapsule encapsulated phase change material, which comprises the following steps: step 1, preparing a first solution, namely uniformly mixing capsule-core components with a polyisocyanates monomer to form the first solution; step 2, preparing a microsphere dispersoid of the first solution; step 3, forming a microcapsule through monomer polymerization, thus obtaining the microcapsule prepared from the polyurethane capsule-wall encapsulated phase change material.

Description

technical field [0001] The invention belongs to the technical field of phase-change material microcapsule preparation, and relates to a polyurethane microcapsule-encapsulated phase-change material, and also relates to a preparation method of the polyurethane microcapsule-encapsulated phase-change material. Background technique [0002] Phase change material microcapsules are composite phase change materials with a core-shell structure formed by encapsulating a layer of stable polymer film on the surface of phase change material particles using microcapsule technology. The microencapsulation technology of phase change materials successfully solves the problems of phase change materials in use, such as phase separation, leakage and corrosion, and brings a lot of convenience to the application of phase change materials. The phase change material is made into microcapsules, which can be conveniently applied to the fields of building energy saving, textile fibers, clothing, foam ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/16
CPCB01J13/16
Inventor 陆少锋邢建伟申天伟
Owner 上海伊纯实业有限公司