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Method for preparing compound photothermal conversion phase change material

A technology of phase change materials and light-to-heat conversion, which is applied in the direction of heat exchange materials, microsphere preparation, chemical instruments and methods, etc., can solve the problems of affecting energy storage and energy release efficiency, easy leakage of phase change materials, poor cycle stability, etc. problems, to achieve the effects of energy storage and energy release, adjustable phase transition temperature, and increased latent heat value

Inactive Publication Date: 2018-09-11
王成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is that most of the current existing phase change materials have poor thermal conductivity, low latent heat, and poor cycle stability, which affect their energy storage and energy release efficiency, and the phase change materials themselves are easy to leak and have high packaging requirements. Defects that are prone to aging provide a preparation method for a composite photothermal conversion phase change material

Method used

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  • Method for preparing compound photothermal conversion phase change material

Examples

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example 1

[0026]Take 12g of p-nitroaniline in a beaker, add 35mL of hydrochloric acid with a mass fraction of 20%, heat up to 70°C, heat and stir until the solids are completely dissolved, then place the beaker in an ice bath and cool it rapidly to 0°C. Stir at a speed of 300r / min and add 40mL of sodium nitrite aqueous solution with a mass fraction of 5%, react for 30min, then add 4g of sulfamic acid to the beaker, filter with suction, and separate to obtain the filtrate, which is p-nitroaniline diazo Salt solution: take 10g of single-walled carbon nanotubes into a three-necked flask, add 200mL of deionized water, place the three-necked flask in an ultrasonic disperser, and ultrasonically disperse at a frequency of 25kHz for 30min at a temperature of 50°C. Add 40mL of p-nitroaniline diazonium salt solution dropwise to the three-necked flask with the funnel at a rate of 3mL / min, and react while dropping, until after the dropwise addition is completed, the reaction solution in the three-ne...

example 2

[0028] Take 14g of p-nitroaniline in a beaker, add 38mL of hydrochloric acid with a mass fraction of 20%, heat up to 75°C, keep stirring until the solids are completely dissolved, then place the beaker in an ice bath and cool it down to 3°C rapidly. Stir at a speed of 350r / min and add 45mL of sodium nitrite aqueous solution with a mass fraction of 5%, react for 33min, then add 4.5g of sulfamic acid to the beaker, filter with suction, and separate to obtain the filtrate, which is the weight of p-nitroaniline. Nitrogen salt solution: take 11g of single-walled carbon nanotubes into a three-necked flask, add 250mL of deionized water, place the three-necked flask in an ultrasonic disperser, and ultrasonically disperse at a frequency of 27kHz for 33min at a temperature of 53°C. Add 45mL p-nitroaniline diazonium salt solution dropwise to the three-necked flask at a rate of 3.5mL / min through the liquid funnel, react while adding dropwise, until the dropwise addition is complete, filter...

example 3

[0030] Take 15g of p-nitroaniline in a beaker, add 40mL of hydrochloric acid with a mass fraction of 20%, heat up to 80°C, keep stirring until the solids are completely dissolved, then place the beaker in an ice bath and cool it down to 5°C rapidly. Stir at a speed of 400r / min and add 50mL of sodium nitrite aqueous solution with a mass fraction of 5%, react for 35min, then add 5g of sulfamic acid to the beaker, filter with suction, and separate to obtain the filtrate, which is p-nitroaniline diazo Salt solution: take 12g of single-walled carbon nanotubes and place them in a three-necked flask, add 300mL of deionized water, place the three-necked flask in an ultrasonic disperser, and ultrasonically disperse at a frequency of 30kHz for 35min at a temperature of 55°C. Add 50mL of p-nitroaniline diazonium salt solution dropwise to the three-necked flask with the funnel at a rate of 4mL / min, and react while dropping, until after the dropwise addition is completed, the reaction solut...

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Abstract

The invention relates to the technical field of semiconductor memory production, and concretely relates to a method for preparing a composite photothermal conversion phase change material. An oil-in-water emulsion is prepared from an emulsifier OP-10, liquid paraffin and hydrochloric acid, and is mixed and reacted with a sodium metasilicate nonahydrate solution to obtain a thermal phase change microcapsule material, thermal phase micro-capsules prepared from liquid paraffin are distributed in the pore structure to block outer holes and increase the pore closing rate, ferrous metal particles are attached to the surface of a phase change material to facilitate the energy storage and the energy release of the phase change material, polyethylene glycol used as a soft segment ad a dye moleculewith two reactive groups, used as a hard segment, undergo a stepwise polycondensation process to synthesize a polycondensed photothermal conversion organic shaped phase change energy storage material,the surface of a carbon nanotube material is modified with diazotized p-nitroaniline to improve the compatibility, and the high thermal conductivity and the high specific surface area of the carbon nanotube material make the distribution of a phase change substance in the phase change material uniform in order to facilitate energy storage and energy release.

Description

technical field [0001] The invention relates to the technical field of preparation of phase change materials, in particular to a preparation method of a composite photothermal conversion phase change material. Background technique [0002] Energy is the basis for human survival. With the development of global industry, global energy is increasingly in short supply. Traditional energy is consumed at an alarming rate. Human beings are facing an energy crisis. Due to population reasons, my country's per capita energy reserves are small, and the energy crisis is particularly prominent in our country. Moreover, traditional energy use can also cause environmental pollution and release a large amount of greenhouse gases to worsen the climate. The deteriorating environment and climate make human beings realize the importance of saving energy, finding new energy and protecting the environment. Replacing traditional fossil energy with renewable energy such as solar energy, wind ...

Claims

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Application Information

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IPC IPC(8): C09K5/06B01J13/02C08G18/48C08G18/76C08J9/36C08L75/04
CPCB01J13/02C08G18/4833C08G18/7614C08J9/36C08J9/365C08J2375/04C08J2475/08C08J2491/06C08K2201/011C09K5/063
Inventor 王成何伟仁张建初
Owner 王成
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