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Composite phase-change cold-accumulation material

A composite material and phase-change cold storage technology, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of reduced cool feeling of dodecanol, difficult to control the shape of the seat cushion, no comfort, etc., and achieves convenient and easy-to-obtain raw materials. , The effect of stable chemical properties and difficult to store containers

Inactive Publication Date: 2014-05-28
PEKING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Yet this kind of cool pad hardness is big, and its hardness is bigger especially after lauryl alcohol becomes solid phase, and there is no comfort at all when using, and simultaneously, after repeatedly using soft foam to break, the shape of cushion solidification is difficult to control, Therefore, there is great inconvenience in practical application
In addition, plastic soft foam itself is a heat-generating material, and the cool feeling brought by lauryl alcohol will be greatly reduced after the human body contacts it.

Method used

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  • Composite phase-change cold-accumulation material
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  • Composite phase-change cold-accumulation material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0097]The phase change cold storage composite material is prepared by the following method:

[0098] At room temperature, weigh dodecyl alcohol, surfactant and water according to the above weight ratio, place the weighed surfactant in a container, add weighed water to it, and batch by batch under stirring Add or drop dodecanol, continue to stir or ultrasonically oscillate to fully mix the above-mentioned components, and prepare a microemulsion phase-change cold storage composite material.

[0099] In the phase change cold storage composite material provided by the present invention, in the preparation process, it is necessary to add dodecanol to the mixture of water and surfactant, if it is added at one time, phase separation will occur and it will also fail when the stirring time is prolonged A homogeneous phase-change cold-storage composite material cannot be prepared; however, when dodecyl alcohol is added or dropped in batches under stirring or ultrasonic conditions, the p...

Embodiment 1

[0140] At normal temperature, weigh 6.00g of dodecanol, 1.00g of Tween-80, and 2.58g of water, place the weighed Tween-80 in a beaker, add the weighed water to it, and stir Add the weighed lauryl alcohol dropwise under the condition of stirring, add the weighed lauryl alcohol in 6 times under the condition of stirring, add 1g each time, stir at intervals of 30s, so that the above-mentioned components are fully mixed evenly, and prepared into micro Emulsion phase change cold storage composite material.

[0141] (1) DSC analysis is carried out to the phase change cold storage composite material that makes, the procedure is:

[0142]1) Decrease to -5°C at 10°C / min; 2) Stabilize at -5°C for 5 minutes; 3) Rise to 60°C at 10°C / min, cycle 50 times, the results are as follows figure 2 shown. Depend on figure 2 It can be clearly seen that the ability of the phase-change cold storage composite material provided by the present invention does not show an obvious downward trend during...

Embodiment 2

[0146] At room temperature, weigh 6.00g of dodecanol, 1.00g of Tween-80, and 4.55g of glycerin, place the weighed Tween-80 in a beaker, add the weighed glycerol at one time, fully After stirring to fully dissolve Tween-80, add the weighed lauryl alcohol in 6 times under the condition of stirring, add 1g each time, stir for 30s at intervals, continue stirring to fully mix the above components evenly, and prepare micro Emulsion phase change cold storage composite material.

[0147] (1) DSC analysis is carried out to the obtained phase change cold storage composite material, the procedure is:

[0148] 1) Decrease to -5°C at 10°C / min; 2) Stabilize at -5°C for 5 minutes; 3) Raise to 60°C at 10°C / min, the results are as follows Figure 6 Shown: the heat of phase transition is 163.1J / g, and the melting point is 23.28°C.

[0149] (2) Structural characterization of the prepared phase change cold storage composite material by infrared spectroscopy, the results are as follows Figure ...

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Abstract

The invention provides a composite phase-change cold-accumulation material. The composite phase-change cold-accumulation material is formed by compounding dodecanol, water, glycerin or a mixture of any two of the dodecanol, the water and the glycerin, and a surfactant. The composite phase-change cold-accumulation material has the characteristics of small hardness, large available phase change latent heat, stable cold accumulation capacity and the like.

Description

technical field [0001] The invention relates to a phase change cold storage composite material, in particular to a phase change cold storage composite material with a phase change temperature between 15°C and 30°C. Background technique [0002] There are usually two ways for materials to store thermal energy: sensible heat and latent heat (ie, phase change heat). 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 change energy storage materials have become a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 贺安琪徐怡庄李毕忠石佳佳崔辉仙许晨曦阳文郭然吴瑾光
Owner PEKING UNIV
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