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Method for preparing organic/inorganic phase change energy storage composite material

A technology of inorganic phase transition and composite materials, applied in the field of material science and engineering, can solve the problems of high carrier cost, poor durability, inappropriate phase transition temperature, etc., and achieves simple preparation process, high stability and good practicability. Effect

Inactive Publication Date: 2011-09-28
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main problems of the load-type phase change energy storage composite materials currently disclosed based on these standards are: (1) the phase change temperature is not suitable, which is higher than the room temperature range that people feel comfortable; (2) the latent heat of phase change is not high, and many Composite materials can't reach 50J / g; (3) The durability is not good, and the phase change material is easy to leak, which leads to the decline of heat storage performance during use; (4) The cost of the carrier is high and the economy is poor

Method used

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  • Method for preparing organic/inorganic phase change energy storage composite material
  • Method for preparing organic/inorganic phase change energy storage composite material

Examples

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Embodiment 1

[0023] Take 1000g of dry diatomite and roast it in a muffle furnace at 350°C for 3h; after cooling to room temperature, add 4000mL of water to make a slurry in a temperature-controllable reaction tank, then add 17.5g of polydimethyldiallylammonium chloride (PDMDAAC), stirred and reacted at 80°C for 2h, then filtered and dried at 105°C to obtain diatomite with pores and surface modification; mix this modified diatomite with 1500g organic phase change compound (1400g stearin N-butyl stearate + 100g methyl stearate) were placed in a temperature-controllable reaction tank, stirred and reacted at 95°C for 2 hours, and an organic / inorganic phase change energy storage composite material was obtained.

Embodiment 2

[0025] Take 1000g of dry diatomite and roast it in a muffle furnace at 350°C for 3h; after cooling to room temperature, add 4000mL of water to make a slurry in a temperature-controllable reaction tank, then add 17.5g of polydimethyldiallylammonium chloride (PDMDAAC), stirred and reacted at 80°C for 2h, filtered, and dried at 105°C to obtain pore and surface modified diatomite; place the modified diatomite and 1500g organic phase change material paraffin in a temperature-controlled Stirring and reacting at 95° C. for 2 hours in a reaction tank to obtain an organic / inorganic phase change energy storage composite material.

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Abstract

The invention relates to a method for preparing an organic / inorganic phase change energy storage composite material, and belongs to the field of material science and engineering. The method comprises the following steps of: calcining kieselguhr; adding the calcined kieselguhr into water, performing size mixing, and performing the modification of pore channels and surfaces by using organic matter;and compounding the modified kieselguhr and an organic phase change material to obtain the organic / inorganic phase change energy storage composite material with a temperature regulating function. In the organic / inorganic phase change energy storage composite material prepared by the method, the phase change temperature is between 15 and 30 DEG C, phase change potential heat is more than or equal to 75 J / g, phase change substances are seldom leaked in the phase change process, and the stability of phase change performance is high; and the organic / inorganic phase change energy storage compositematerial is simple in a preparation process, low in cost and high in practicality.

Description

Technical field: [0001] The invention relates to a preparation method of an organic / inorganic phase change energy storage composite material with a temperature regulating function, belonging to the field of material science and engineering. Background technique: [0002] A phase change energy storage material refers to a material that can be used for energy storage by utilizing a large amount of heat energy that it absorbs (releases) when its state changes. A new type of energy-saving material for the purpose of temperature adjustment and constant temperature by adjusting the ambient temperature in the closed area. Phase change energy storage temperature control can be used to alleviate the mismatch of energy supply and demand in terms of time, intensity and location. Energy saving and other fields have broad application prospects. [0003] Phase change materials with application prospects are generally organic or inorganic solid-liquid phase change materials. In practice...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 郑水林张晓波张玉忠怀杨杨
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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