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A kind of high adsorption expansive montmorillonite and its preparation method

A montmorillonite and modified technology, applied in the field of phase change material carrier, can solve the problems of limited application scope and high conductivity, and achieve the effects of wide application prospect, high adsorption performance and excellent insulation

Active Publication Date: 2020-10-27
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the current research, the carriers used in phase change energy storage materials are mostly layered silicates such as montmorillonite, but their loading rates are all lower than 75wt%. Loading rate of nano-carriers, but its conductivity is too high, which limits its application range. With the development of phase change energy storage materials, a phase change material with simple preparation, low price, low density, high loading rate and good insulation The carrier is bound to have a great market demand, and this new material is also of great significance to the development of phase change composite shaping materials

Method used

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  • A kind of high adsorption expansive montmorillonite and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Weigh 20g of T5000 polyetheramine and dissolve it in 200ml of acetone solution, pour

[0024] In a 250ml three-necked flask, stir magnetically for 30min at a speed of 150r / min, measure 0.43g of concentrated hydrochloric acid (the molar ratio of hydrochloric acid to amine group is 1:1) and dissolve it in 10ml of deionized water, add it dropwise to the three-necked flask, and put the three-necked flask Place in ice-water mixture, magnetically stir for 4 hours, then place the prepared ammonium salt in the refrigerator to refrigerate;

[0025] (2) Disperse 4g of sodium-based montmorillonite in 400ml of deionized water. After stirring evenly, add 200ml of the prepared polyetheramine salt solution dropwise at room temperature and stir while adding. After 30 minutes, pour the system into three In the flask, the oil bath was heated to 70° C., and the reaction was continued for 4 hours. After the reaction, the mixed solution in the three-necked flask was centrifuged (centri...

Embodiment 2

[0030] (1) Weigh 20g of T5000 polyether amine and dissolve it in 200ml of acetone solution, pour it into a 250ml three-necked flask, stir it magnetically for 30min, and the speed is 150r / min, measure 0.43g of concentrated hydrochloric acid (the molar ratio of hydrochloric acid to amino group is 1:1) was dissolved in 10ml of deionized water, added dropwise to a three-necked flask, placed in a mixture of ice and water, stirred magnetically for 4 hours, and then the prepared E51-T5000 ammonium salt was placed in a refrigerator to refrigerate;

[0031] (2) Disperse 4g of sodium-based montmorillonite in 400ml of deionized water. After stirring evenly, add 200ml of the prepared polyetheramine salt solution dropwise at room temperature and stir while adding. After 30 minutes, pour the system into three In the flask, the oil bath was heated to 70° C., and the reaction was continued for 4 hours. After the reaction, the mixed solution in the three-necked flask was centrifuged (centrifug...

Embodiment 3

[0036] (1) Weigh 20g of T5000 polyether amine and dissolve it in 200ml of acetone solution, pour it into a 250ml three-neck flask, stir it magnetically for 30min, and the speed is 150r / min, measure 0.43g of concentrated hydrochloric acid (the molar ratio of hydrochloric acid to amino group is 1:1) Dissolve in 10ml of deionized water, add dropwise into a three-neck flask, place the three-necked flask in a mixture of ice and water, stir magnetically for 4 hours, and then place the prepared E51-T5000 ammonium salt in the refrigerator to refrigerate;

[0037](2) Disperse 4g of sodium-based montmorillonite in 400ml of deionized water. After stirring evenly, add 200ml of the prepared polyetheramine salt solution dropwise at room temperature and stir while adding. After 30 minutes, pour the system into three In the flask, the oil bath was heated to 70° C., and the reaction was continued for 4 hours. After the reaction, the mixed solution in the three-necked flask was centrifuged (cen...

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Abstract

The invention relates to expanded layered silicate, in particular to high-adsorbability expanded montmorillonite and a preparation method and application thereof. In the preparation process of the expanded montmorillonite, polyether amine salt modified montmorillonite is dispersed in N-methylpyrrolidone for a long time to form exfoliated montmorillonite having good dispersity, then organic matteris removed at low temperature, montmorillonite activating treatment is performed at high temperature to obtain the expanded montmorillonite low in bulk density. The adsorbing effect of the montmorillonite is equivalent to that of expanded graphite, the adsorption rate reaches 90% or above by weight, and the high-adsorbability expanded montmorillonite can be widely applied to lots of fields such asphase change energy storage materials, building materials and thermal insulation materials.

Description

technical field [0001] The invention relates to a novel phase-change material carrier, in particular to a high-adsorption expansive montmorillonite and a preparation method of the material. Background technique [0002] Today, when the global energy sources are gradually decreasing and the environment is seriously polluted, it is extremely urgent to research and develop renewable energy sources and develop efficient energy-saving technologies. Utilizing the phase change latent heat of phase change materials to realize energy storage and application is conducive to improving energy utilization efficiency, and has become a research hotspot in the field of materials science. Among them, the most widely studied is the composite phase change energy storage material. The composite phase change material is to fill the amorphous phase change material in the phase change process into the phase change material carrier with relatively good thermal performance, and in the phase change p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40
CPCC01B33/40C01P2006/10
Inventor 王小群樊超曹娜娜张栩
Owner BEIHANG UNIV