A preparation method of hypercrosslinked polystyrene loaded organic phase change material and the composite phase change material prepared therefrom

A polystyrene and organic phase technology, applied in the field of energy storage, can solve the problems of liquid phase leakage and low thermal conductivity of organic phase change materials, and achieve the effects of high-efficiency coating, simple preparation process, and easy popularization and application

Active Publication Date: 2020-04-03
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of super-crosslinked polystyrene-loaded organic phase change materials, and at the same time solve the problems of liquid phase leakage and low thermal conductivity of organic phase change materials

Method used

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  • A preparation method of hypercrosslinked polystyrene loaded organic phase change material and the composite phase change material prepared therefrom
  • A preparation method of hypercrosslinked polystyrene loaded organic phase change material and the composite phase change material prepared therefrom
  • A preparation method of hypercrosslinked polystyrene loaded organic phase change material and the composite phase change material prepared therefrom

Examples

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Embodiment 1

[0043] Add 1.5g polystyrene and 30mL 1,2-dichloroethane into a 100mL round bottom flask, place the flask in a magnetic stirring water bath and stir until the polystyrene is completely dissolved, then add 15g paraffin (phase transition temperature is 5 degree), heat and stir at 50°C until the paraffin is completely dissolved, add 3.3g of dimethoxymethane, add 1.125g of ferric chloride, heat and stir at 50°C for 12 hours, take out the reactant, and place it in a rotary evaporator Remove excess solvent by evaporation. Dissolve the solid after vacuum distillation in absolute ethanol, add ammonia water to adjust the pH of the solution to ≥ 10, put the resulting mixture in a 30kW ultrasonic cell pulverizer and sonicate for 0.5 hours, take it out and put it in a magnetic stirring water bath, adjust the temperature at 50°C with a rotational speed of 600r / min, heat and stir for 10 hours, take the resulting mixture out and place it in a rotary evaporator, evaporate the solvent, and then...

Embodiment 2

[0046] Add 1.5g of polystyrene and 30mL of methylene chloride in a 100mL round bottom flask, place the flask in a magnetic stirring water bath and stir until the polystyrene is completely dissolved, then add 7.5g of paraffin (phase transition temperature is 25 degrees), 50 Heat and stir at ℃ until the paraffin is completely dissolved, add 1.09g of dimethoxymethane, add 1.912g of aluminum trichloride, heat and stir at 50℃ for 12 hours, take out the reactant, and evaporate it in a rotary evaporator Excess solvent. Dissolve the solid after distillation under reduced pressure in absolute ethanol, add sodium hydroxide to adjust the pH of the solution to ≥ 10, place the resulting mixture in a 20kW ultrasonic cell pulverizer and sonicate for 0.5 hours, take it out and place it in a magnetically stirred water bath, Adjust the temperature to 50°C, rotate at 600r / min, heat and stir for 10 hours, take the resulting mixture out and place it in a rotary evaporator, evaporate the solvent, a...

Embodiment 3

[0049]Add 1.5g of polystyrene and 30mL of chloroform to a 100mL round bottom flask, place the flask in a magnetic stirring water bath and stir until the polystyrene is completely dissolved, then add 4.5g of paraffin (phase transition temperature is 30 degrees), 60 Heat and stir at ℃ until the paraffin is completely dissolved, add 1.7739g of 1,2-dichloroethane, add scandium trifluoromethanesulfonate 7.0577g, heat and stir at 60℃ for 20 hours, take out the reactant, and place in a rotating In an evaporator, the excess solvent was evaporated. Dissolve the solid after vacuum distillation in absolute ethanol, add potassium hydroxide to adjust the pH of the solution to ≥ 10, place the resulting mixture in a 50kW ultrasonic cell pulverizer for 1 hour, take it out and place it in a magnetic stirring water bath, Adjust the temperature to 60°C, rotate at 600r / min, heat and stir for 16 hours, take out the resulting mixture and place it in a rotary evaporator, evaporate the solvent, and t...

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Abstract

Disclosed are a method for preparing a super-crosslinked polystyrene supported organic phase change material and a composite phase change material prepared therefrom. The method comprises: dissolving polystyrene in a halogenated hydrocarbon solvent, then adding an organic phase change material to the dissolved polystyrene, and stirring same until same is completely dissolved to obtain a mixed solution; adding a crosslinking agent and a Lewis acid catalyst to the mixed solution, stirring and reacting same for 12 to 24 hours, and after the reaction is completed, evaporating same under reduced pressure to remove excess solvent; dissolving a residual solid in ethanol, ultrasonically dispersing same for 0.5 to 1 hour under alkaline conditions, and further stirring same for 10 to 18 hours; and after the reaction is completed, evaporating same under reduced pressure to remove the solvent and drying same to obtain the super-crosslinked polystyrene supported organic phase change material. According to the invention, the step of forming a super-crosslinked polymer skeleton and the step of coating same with the phase change material are synchronously carried out, ensuring that the efficiency of the coating with the phase change material is high and that the latent heat of the resulting material is high, with leakages being difficult; in addition, the catalyst for super-crosslinking is converted into a corresponding metal oxide under alkaline conditions, so that it is not necessary to remove the metal catalyst, and the resulting metal oxide serves to enhance heat transfer.

Description

technical field [0001] The invention belongs to the technical field of energy storage, and relates to a composite phase change energy storage material, in particular to a method for preparing an organic phase change material supported by hypercrosslinked polystyrene and the prepared composite phase change material. Background technique [0002] With the acceleration of industrialization, fossil fuels are gradually depleted, environmental pollution is becoming more and more serious, and the natural balance has been destroyed, prompting the world to seek alternative energy and clean energy, and to improve the level of energy utilization. Utilizing the phase change latent heat of phase change materials (PHaseChange Material, PCM) to realize energy storage and utilization, which is helpful to improve energy efficiency and develop renewable energy, has become a worldwide research hotspot in the field of energy science and material science in recent years. . [0003] Phase change...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/24C08L91/06C08L25/06C08L29/04C09K5/06
CPCC08J3/24C08L25/06C08L29/04C08L91/06C09K5/06
Inventor 饶中浩刘昌会徐泽赵佳腾刘臣臻霍宇涛
Owner CHINA UNIV OF MINING & TECH
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