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A kind of preparation method and device of microcapsule phase change material

A phase change material and preparation device technology, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical/physical/physicochemical process of energy application, etc., can solve the problem of multi-operation steps and microcapsule size organic phase change material coating rate Uncontrollable and other problems, to achieve the effect of high monodispersity, controllable coverage rate, and controllable size

Active Publication Date: 2020-03-10
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method has many operating steps, and the size of the microcapsules and the coating rate of the organic phase change material are uncontrollable

Method used

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  • A kind of preparation method and device of microcapsule phase change material
  • A kind of preparation method and device of microcapsule phase change material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The preparation method of the microcapsule phase change material according to another exemplary embodiment of the present invention includes: connecting the outlet of the outer channel with a high-voltage power supply; An electrostatic field is formed between the outlet and the receiving unit; the liquid phase change material is injected into the inner channel and ejected from the outlet of the inner channel, and the silica sol is injected into the outer channel and ejected from the outlet of the outer channel. The outer channel and the inner channel are coaxial And the inner channel is located in the outer channel, the cross-section of the inner channel outlet and the outer channel outlet are located on the same horizontal plane, and the axis extends along the vertical direction; the electrospray liquid ejected from the inner channel outlet and the outer channel outlet falls into the In the receiving liquid of the receiving unit; that is to say, in the present embodimen...

example 1

[0046] (1) Take 4 mL of dodecanoic acid and ethanol mixed solution (mass ratio 3:1) and 4 mL of silica sol with a 5 mL syringe, fix the syringe on a micro-injection pump, and connect it to the inner and outer channels through rubber tubes.

[0047] (2) Adjust the flow rate of the inner and outer channels to 5 μL min -1 .

[0048] (3) Adjust the high-voltage power supply voltage to 6.6kV, and the receiving distance to 5cm.

[0049] (4) Put distilled water in a petri dish, stir with a low-speed magnetic force to receive the electrospray solution, and keep the temperature at 50°C for 4 hours.

[0050] (5) Filter the receiving solution and dry at 80° C. for 24 hours to obtain a microcapsule phase change material with a diameter of about 50 μm.

example 2

[0052] Steps (1), (3), and (4) are the same as Example 1.

[0053] Step (2) Adjust the flow rate of the inner and outer channels to 10 μL min -1 and 10μL·min -1 .

[0054] Step (5) is the same as Example 1, but the microcapsule phase change material of about 70 μm is obtained.

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Abstract

The invention provides a preparation method and a preparation apparatus of a microcapsule phase transition material. The preparation method comprises the following steps: an external channel exit anda high voltage supply are connected; a reception unit which is located below the external channel exit is grounded, wherein the distance between reception unit and the external channel exit is predetermined, so that an electrostatic field is formed between the external channel exit and the reception unit; a phase transition material of liquid state is injected into an internal channel and is sprayed out from an inner channel exit, silica sol is injected into an external channel and is sprayed from an external channel exit, and the external channel and the internal channel are coaxial (verticalaxis) and the internal channel is positioned in the external channel; electronic injection liquid sprayed from the internal channel exit and an external channel exit falls into reception liquid of the reception unit; the reception liquid is heated, and the electronic injection liquid is gelatinized; filtering and drying are carried out in order to obtain the microcapsule phase transition material. The preparation apparatus comprises the internal channel, the external channel, the reception unit and the high voltage supply. The method and the apparatus can be used for preparing the microcapsule phase transition material with controllable size and coating rate.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and more specifically relates to a high-voltage electrostatic spraying method for preparing silicon dioxide-coated organic phase-change microcapsule materials. Background technique [0002] Phase change materials use the heat absorbed or released when a substance undergoes a phase change to store and supply energy, also known as phase change energy storage materials. Organic phase change materials have moderate phase transition temperature, large phase transition latent heat, and no supercooling phenomenon, and are widely used in intelligent thermal insulation materials. Microcapsule phase change material is a phase change material with a core-shell structure that is coated with a layer of polymer material or inorganic material on the outside of the phase change material by using microcapsule technology. Coating organic phase change materials in inorganic materials to form microcaps...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02B01J19/08
Inventor 付真金代丽易勇毕鹏
Owner SOUTHWEAT UNIV OF SCI & TECH