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Preparing method for phase transited stored energy microcapsule covered with an organic polymer material

An organic polymer and phase change energy storage technology, applied in the field of phase change energy storage microcapsules, can solve the problems of insufficient stability of phase change energy storage material emulsion, poor affinity of organic matrix, wide particle size distribution, etc., to achieve Environmentally friendly affinity, stable physical and chemical properties, uniform distribution effect

Inactive Publication Date: 2009-09-16
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, several typical problems of microencapsulation technology are: elasticity, permeability, weather resistance and chemical medium resistance, degradability of microcapsule shell materials; morphology, particle size, loading capacity of microcapsules, etc.
The process of this method is simple, but due to the insufficient stability of the emulsion of the phase change energy storage material, the morphology of the prepared products is mostly irregular, the particle size distribution is wide, and the mechanical properties of the wall material are poor, and the compatibility with the organic matrix is ​​not good. and other shortcomings, so its application range is limited

Method used

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  • Preparing method for phase transited stored energy microcapsule covered with an organic polymer material
  • Preparing method for phase transited stored energy microcapsule covered with an organic polymer material
  • Preparing method for phase transited stored energy microcapsule covered with an organic polymer material

Examples

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Embodiment 1

[0029] The organic macromolecular monomer A, organic macromolecular monomer B and organic macromolecular monomer C in Example 1 are selected from acrylic acid, acrylamide and epichlorohydrin respectively, and the organic phase change material is 25°C with a phase transition temperature of 30°C. #Phase change paraffin, the preparation process is as follows:

[0030] Take 10g of 25# phase-change paraffin wax with a phase transition temperature of 30°C and 0.5g of epichlorohydrin, add 2g of a mixed emulsifier composed of Span80 and Tween80 at a mass ratio of 0.4:0.6, heat in a water bath at 45°C, and stir at 500r / min Mix evenly to make the oil phase;

[0031] Add 1g of acrylic acid and 1g of acrylamide into 50g or 40g of distilled water at room temperature, stir at 500r / min for 10min and mix evenly to form an aqueous phase.

[0032]Slowly add the above oil phase dropwise to the water phase under stirring under heating in a water bath, heat and emulsify at 35°C for 45 minutes to ...

Embodiment 2

[0037] The organic macromolecular monomer A and the organic macromolecular monomer B in Example 2 are selected from acrylic acid and methyl propyl butyl ester respectively, and the organic phase change material is octadecane whose phase transition temperature is 29° C. The preparation process is as follows:

[0038] Take 10g of octadecane with a phase transition temperature of 29°C, add 0.8g of Span80 and Tween80 as an emulsifier compounded at a mass ratio of 0.5:0.5, heat in a water bath at 45°C and stir at 500r / min and mix evenly to form an oil phase;

[0039] Weigh 1.5 g of acrylic acid and 1 g of methyl propyl butyl ester at room temperature and stir and mix evenly, add 50 g of distilled water, and stir at 500 r / min for 10 min to form an aqueous phase.

[0040] Slowly add the oil phase dropwise to the stirring water phase under heating in a water bath, heat and emulsify at 45°C for 45 minutes to obtain a stable emulsion. Weigh 0.02 g of ammonium persulfate and add 4 g of d...

Embodiment 3

[0042] The organic polymer monomers A, B and C in Example 3 were selected from acrylic acid, methyl methacrylate and styrene respectively, and the organic phase change material was n-butyl stearate with a phase change temperature of 22°C. The preparation process was as follows :

[0043] Take 10g of n-butyl stearate with a phase transition temperature of 22°C and 0.5g of styrene, add 1.5g of a mixed emulsifier composed of Span80 and Tween80 at a mass ratio of 0.4:0.6, heat in a water bath at 35°C, and stir at 600r / min Mix evenly to make the oil phase;

[0044] Weigh 2 g of acrylic acid and 0.5 g of methyl methacrylate at room temperature, stir and mix evenly, add 60 g of distilled water and stir to form an aqueous phase.

[0045] Heat in a water bath at 40°C, slowly add the oil phase dropwise to the water phase under stirring, heat and emulsify at 40°C for 45 minutes to obtain a stable emulsion. Weigh 0.04 g of azobisisobutyronitrile and add 4 g of n-butanone to prepare an i...

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Abstract

A preparing method for phase transited stored energy microcapsule covered with an organic polymer material adopts the following steps: (1) mixing the 10 weight organic phase transited material and 0.5-2.5 weight nonionic surfactant under the condition of heating and blending; (2) picking the organic polymer material monomer A, B 2-3 weight to add to 40-60 weight water, blending and mixing as the water phase; (3) adding the oil phase to the water phase, blending the material as the creaming liquid at 30-50 centigrade, adding the free radical to the initiator for the poly-reaction 1-8h at 35-90 centigrade; then adjusting the low temperature as blending the material and adding the cross linker, filtering, washing and drying to obtain the finished products. The organic polymer material achieves the phase transited capsule envelopment via the creaming polymer reaction of the wall material; the microcapsule is the spherical; the granule is distributed evenly; the polymer wall material has a stable intensity, great tightness and great mechanical performance.

Description

technical field [0001] The invention relates to a preparation technology of a phase change energy storage material, in particular to a preparation method of a phase change energy storage microcapsule using an organic polymer material as a wall material and the phase change energy storage microcapsule prepared by the method. Background technique [0002] At present, one of the important fields of energy-saving technology research is the development of high-efficiency, long-life phase-change energy storage materials, through which the development and utilization of solar energy, industrial waste heat and other energy can be realized. The working principle of phase change energy storage materials is: use the phase change reaction of the material to absorb (release) the latent heat of phase change to realize the absorption (release) of energy in the environment, and then achieve the purpose of energy storage. Phase change energy storage materials can alleviate or even solve the ...

Claims

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Application Information

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IPC IPC(8): B01J13/14C09K5/02
Inventor 褚晓东唐国翌姚有为翁端
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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