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Mineral-based chemical heat storage composite material and preparation method thereof

A composite material and chemical technology, applied in the field of mineral-based chemical heat storage composite materials and their preparation, can solve the problems of poor thermal conductivity and large specific surface area, and achieve the effects of stable performance, wide source of raw materials, and improved activity.

Active Publication Date: 2016-05-11
辽宁卓仑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a layered silicate mineral material, talc powder has stable performance, strong adsorption, and large specific surface area. It can be used as a support material for phase change heat storage materials and used to prepare composite phase change heat storage materials, but its thermal conductivity is poor. Compared with kaolin, it has obvious disadvantages. Therefore, talc powder is rarely used in phase change energy storage materials, but the stable crystal form and layered structure of talc powder make it possible to apply in heat storage materials. Applying talc powder to the preparation of heat storage materials can greatly increase the value of talc powder and expand the range of raw materials for heat storage materials, which is of great significance to the development of heat storage materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Evenly mix 40 parts by weight of talc powder, 5 parts by weight of alkyl amino acid, and an appropriate amount of deionized water, then add them to a planetary ball mill, heat, and grind at a temperature of 50°C and a speed of 500r / min After 60 minutes, the mixture is obtained by filtering the material, that is, the interaction between the positive charge of the magnesium ion in the talc powder and the negative charge of the alkyl group in the alkyl amino acid is used to embed the alkyl group into the layered structure of the talc powder In the gap, the distance between the talcum powder layers is enlarged to achieve the effect of layer expansion;

[0024] 2, the talcum powder that step 1 obtains and the nano-graphite of 15 weight parts, the ammonium maleate of 45 weight parts carry out uniform dispersion mixing and dissolving in an appropriate amount of deionized water, and process 10 minutes with ultrasonic vibration, make nano-graphite, ammonium The salt is immers...

Embodiment 2

[0027] 1. Evenly mix 55 parts by weight of talc powder, 10 parts by weight of alkyllactam, and an appropriate amount of deionized water, then add them to a planetary ball mill, and heat them, at a temperature of 60°C and a speed of 500r / min Grinding for 30 minutes, discharging and filtering to obtain the mixture, that is to use the interaction between the positive charge of the magnesium ion in the talc powder and the negative charge of the alkyl group in the alkyl lactam to embed the alkyl group into the talc powder layer In the gap of the shape structure, the distance between the talcum powder layers is enlarged to achieve the effect of layer expansion;

[0028] 2. The talc powder obtained in step 1, the nano-graphite of 15 parts by weight, and the ammonium tartrate of 45 parts by weight were uniformly dispersed and mixed in an appropriate amount of deionized water, and were treated with ultrasonic vibration for 20 minutes to make the nano-graphite and ammonium salt Under th...

Embodiment 3

[0031] 1. Evenly mix 45 parts by weight of talc powder, 5 parts by weight of alkyldiamine, and an appropriate amount of deionized water, then add them to the planetary ball mill, and heat it at a temperature of 50°C and a speed of 500r / min. Grinding for 30 minutes, discharging and filtering to obtain the mixture, that is, using the interaction between the positive charge of the magnesium ion in the talcum powder and the negative charge of the alkyl group in the alkyldiamine to embed the alkyl group into the talcum powder layer In the gap of the shape structure, the distance between the talcum powder layers is enlarged to achieve the effect of layer expansion;

[0032] 2. The talcum powder obtained in step 1, 15 parts by weight of nano-graphite, and 35 parts by weight of ammonium citrate were uniformly dispersed, mixed and dissolved in an appropriate amount of deionized water, and treated with ultrasonic vibration for 15 minutes to make nano-graphite and ammonium salt Under the...

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Abstract

A mineral-based chemical heat storage composite material and a preparation method thereof are disclosed, the mineral-based chemical heat storage composite material having a chemical heat storage function is prepared by talcum powder modification, interlaminar ammonium ions of the mineral-based chemical heat storage composite material may enter talcum powder crystal lattices under the conditions of ambient temperature> 60 DEG C to absorb heat to form H-O and Mg-N bonds and fill defects, when the ambient temperature is below 20 DEG C, the H-O and Mg-N bonds formed with ammonium ions in the crystal lattices break and emit heat so as to achieve the effects of heat storage and heat release, and the mineral-based chemical heat storage composite material is stable in performance, large in heat storage amount, capable of being used repeatedly, mild in reaction conditions, easy to control, wide in range of sources of raw materials and suitable for low-temperature heat storage, and has broad market prospects.

Description

technical field [0001] The invention relates to a heat storage composite material and a preparation method thereof, in particular to a mineral-based chemical heat storage composite material and a preparation method thereof. Background technique [0002] Heat storage technology is an important technology to improve energy utilization efficiency and protect the environment. It can be used to solve the rationing contradiction between heat energy supply and demand. Energy saving in civil buildings and air conditioners has broad application prospects, and has become a worldwide research hotspot. The current heat storage methods mainly include: sensible heat, latent heat (phase change) and chemical reaction heat storage. Sensible heat storage technology is the earliest and most mature technology, and its heat storage device is more convenient to operate and manage; latent heat storage has a higher density, and the heat storage and release process is approximately constant tempera...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 陈庆曾军堂叶任海
Owner 辽宁卓仑科技有限公司
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