Phase change cold accumulation composite material based on polyethylene glycol

A phase change cold storage and composite material technology, applied in the field of composite materials, can solve the problems of packaging leakage and cleaning trouble, and achieve the effects of high phase change heat, cold storage capacity retention, and low phase transition temperature.

Active Publication Date: 2015-04-22
南京璇玑新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Chinese patent CN 102732228 B discloses a phase change cold storage material based on dodecyl alcohol and paraffin, which uses dodecyl alcohol and paraffin as the main body of the phase change material. Although the current research on the safety

Method used

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  • Phase change cold accumulation composite material based on polyethylene glycol
  • Phase change cold accumulation composite material based on polyethylene glycol
  • Phase change cold accumulation composite material based on polyethylene glycol

Examples

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preparation example Construction

[0089] According to another aspect of the present invention, a kind of preparation method of polyethylene glycol-based phase change cold storage composite material is provided, the method comprises the following two steps:

[0090] Step 1, polyethylene glycol and solvent are added in the container.

[0091] In the above step 1, the parts by weight of the polyethylene glycol are 8-10 parts, and the parts by weight of the solvent are 0.3-5 parts, wherein,

[0092] The molecular weight of the polyethylene glycol is 400-2000, and the solvent is one or more of water and water-miscible organic solvents.

[0093] In particular, the water-miscible organic solvent is an alcoholic solvent.

[0094] In the above step one, the addition method of the polyethylene glycol and the solvent is not particularly limited, and can be selected and set according to actual needs.

[0095] In a preferred embodiment, the polyethylene glycol is added into the container, and then the solvent is added in...

Embodiment 1

[0174] Centrifugation of polyethylene glycol

[0175] (1) Weigh 25.00g of polyethylene glycol 1000 and heat it at 60-80°C to melt it completely;

[0176] (2) Pour the completely melted polyethylene glycol into a centrifuge tube, place it in a centrifuge and centrifuge for 10 minutes, wherein the rotation speed is 20000 rpm / min, and the centrifugation temperature is 24°C.

Embodiment 2

[0178] (1) At room temperature, weigh 9.40 g of Polyethylene Glycol 1000 and 0.60 g of water obtained through the treatment in Example 1, first add 9.4 g of Polyethylene Glycol 1000 into the beaker, and then add the weighed solution dropwise. water;

[0179] (2) After uniformly mixing polyethylene glycol 1000 and water, the phase change cold storage composite material I was prepared.

[0180] After the infrared test of material Ⅰ, the infrared characteristic peaks are as follows:

[0181] 3438cm -1 (OH stretching vibration), 2872cm -1 (CH 3 Symmetric stretching vibration), 1648cm -1 (Liquid H 2 O variable angle vibration), 1466cm -1 (CH 2 variable angle vibration), 1434cm -1 , 1280cm -1 , 1242cm -1 (C-O-C anti-symmetric telescopic), 1090cm -1 (alcohol COH expansion and contraction), 947cm -1 (C-O-C symmetrical telescopic), 841cm -1 .

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Abstract

The invention provides a phase change cold accumulation composite material based on polyethylene glycol. The phase change cold accumulation composite material comprises 8-10 parts of polyethylene glycol and 0.3-5 parts of solvent, wherein the solvent is water and one or more of organic solvent soluble with water. The phase change cold accumulation composite material further comprises 0.05-2 parts of nucleating agents. The phase change cold accumulation composite material has high phase change heat and low phase change temperature and can be circularly used, and the cold accumulation capacity of the phase change cold accumulation composite material keeps good. Meanwhile, a preparing method of the phase change cold accumulation composite material is simple, practicable and low in cost.

Description

technical field [0001] The present invention relates to composite materials, in particular to a phase-change cold storage composite material, and more particularly to a polyethylene glycol-based phase-change cold storage composite material. Background technique [0002] There are usually two ways for materials to store thermal energy: sensible heat and latent heat (latent heat is the heat of phase change). Sensible heat storage is carried out by using the specific heat capacity of the material and the temperature change of the material; latent heat storage is carried out by using the energy absorption and release of the substance during the state transition process, and the latent heat storage is usually much higher than the sensible heat storage. Therefore, using the latent heat of materials for energy storage and cold storage has a broader prospect. [0003] As stated in the non-patent literature "Phase Change Materials and Phase Change Energy Storage Technology", phase c...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/066Y02E60/14
Inventor 贺安琪徐怡庄
Owner 南京璇玑新材料有限公司
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