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Preparation method of phase change energy storage paraffin microcapsule with multiple layers of capsule shells

A technology of paraffin microcapsules and phase change energy storage, which is applied in the field of preparation of phase change material microcapsules, which can solve problems such as core material leakage and volume change, achieve large thickness and smoothness, increase application performance, and improve hydrophilicity sexual effect

Active Publication Date: 2016-01-13
GUANGXI RES INST OF CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shell of the paraffin microcapsules synthesized in this way is relatively thin, and the volume changes due to the repeated phase transition process of the energy storage material paraffin during use, and the stress generated will leak the capsule core material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Mix 0.5 parts by weight of trimesoyl chloride active monomer with 10 parts by weight of phase-change paraffin, heat to 60°C, add it to the emulsifier aqueous solution at the same temperature, and then adjust the speed of the high-speed homogenizer to 8000rpm / min under heat preservation Add 1 part of m-phenylenediamine cross-linking agent aqueous solution while stirring to make an oil-in-water emulsion to obtain a preliminary reacted paraffin microcapsule emulsion; transfer the above-mentioned paraffin microcapsule emulsion to a flask, and adjust the rotating speed to 200rpm in a heat preservation state Continue to stir for 30 minutes, add an appropriate amount of caustic soda aqueous solution to neutralize the hydrogen chloride generated by the system, adjust the pH of the solution to 8.1, separate and wash with water after the stirring, and obtain paraffin microcapsules whose inner layer is polyamide; The paraffin wax microcapsules of amides were added to tris-HCl buffe...

Embodiment 2

[0025] Mix 1 part by weight of trimesoyl chloride active monomer with 10 parts by weight of phase-change paraffin, heat to 65°C, add it to the emulsifier aqueous solution at the same temperature, and then adjust the speed of the high-speed homogenizer to 10000rpm / min in the heat preservation state Add 1.5 parts of m-phenylenediamine cross-linking agent aqueous solution while stirring, make oil-in-water emulsion, obtain the paraffin microcapsule emulsion of preliminary reaction; Transfer the above-mentioned paraffin microcapsule emulsion to the flask, and adjust the rotating speed to be 250rpm in the heat preservation state Continue to stir for 60 minutes, add an appropriate amount of caustic soda aqueous solution to neutralize the hydrogen chloride generated by the system, adjust the pH of the solution to 8.5, separate and wash with water after the stirring, and obtain paraffin microcapsules whose inner layer is polyamide; The paraffin wax microcapsules of amide were added to t...

Embodiment 3

[0027] Mix 1.5 parts by weight of trimesoyl chloride active monomer with 10 parts by weight of phase-change paraffin, heat it to 70°C, add it to the emulsifier aqueous solution at the same temperature, and then adjust the speed of the high-speed homogenizer to 12000rpm / min in the heat preservation state Add 2 parts of m-phenylenediamine cross-linking agent aqueous solution while stirring to make an oil-in-water emulsion to obtain a preliminary reacted paraffin microcapsule emulsion; transfer the above paraffin microcapsule emulsion to a flask, and adjust the rotating speed to 300rpm in a heat preservation state Continue to stir for 90 minutes, add an appropriate amount of caustic soda aqueous solution to neutralize the hydrogen chloride generated by the system at the same time, adjust the pH of the solution to 9, separate and wash with water after the stirring, and obtain paraffin microcapsules whose inner layer is polyamide; The paraffin wax microcapsules of amide were added t...

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Abstract

The invention discloses a preparation method of a phase change energy storage paraffin microcapsule with multiple layers of capsule shells. The method comprises the following steps: 1, mixing a trimesoyl chloride active monomer with phase change paraffin, heating to form an oil phase liquid, adding the oil phase liquid to an aqueous emulsifier solution having a same temperature with the oil phase liquid, and adding an aqueous solution of an m-phenylenediamine cross-linking agent while stirring to prepare an oil-in-water emulsion; 2, continuously stirring the above paraffin microcapsule emulsion in a heat insulation state, adjusting the pH value of the paraffin microcapsule emulsion to be greater than 8.0 in the stirring process, centrifuging after the stirring ends, and washing with water; and 3, adding the above paraffin microcapsule with the inner layer capsule shell of polyamide to a trihydroxymethyl aminomethane-HCl buffer solution containing 4-(2-aminoethyl)-1,2-resorcinol, dipping while continuously stirring at room temperature, separating, washing with water, and drying. The energy storage paraffin microcapsule can prevent leakage of capsule core paraffin in the phase change process, has good endophilicity with water, and is in favor of transferring heat.

Description

technical field [0001] The invention relates to a preparation method of phase-change material microcapsules, in particular to a preparation method of paraffin phase-change energy storage microcapsules with multi-layer capsule skins. Background technique [0002] Paraffin is a liquid-solid phase change energy storage material with large latent heat, chemical inertness, no corrosion and no phase change hysteresis. In order to ensure the normal operation of the liquid-solid phase transition, paraffin wax needs to be encapsulated. Microencapsulation is a common way of miniaturized paraffin wax encapsulation, and it is mainly used as a thermal energy storage and transmission medium. Since paraffin is a hydrophobic and non-polar molecule, the capsule material is designed as a hydrophilic polar polymer. As long as the capsule is thick enough, the tiny gaps can block the hydrophobic and non-polar paraffin due to its hydrophilic polarity. [0003] The commonly used methods for paraf...

Claims

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Application Information

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IPC IPC(8): B01J13/16B01J13/18C09K5/06
CPCY02P20/141
Inventor 莫友彬余慧群周海廖艳芳彭初和
Owner GUANGXI RES INST OF CHEM IND CO LTD
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