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Preparation method and preparation apparatus of microcapsule phase transition 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: 2018-01-19
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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  • Preparation method and preparation apparatus of microcapsule phase transition material
  • Preparation method and preparation apparatus of microcapsule phase transition 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 to a high-voltage power supply; and grounding a receiving unit located under the outlet of the outer channel and a predetermined distance from the outlet of the outer channel to connect to the outer channel. 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, 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-sections of the inner channel outlet and the outer channel outlet are on the same horizontal plane, and the axis extends in the vertical direction; the electrospray liquid sprayed from th...

example 1

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

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

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

[0049] (4) Take distilled water in a petri dish, stir to receive the electrospray with low-speed magnetic stirring, and hold at 50°C for 4h.

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

example 2

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

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

[0054] Step (5) is the same as in 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 spray method for preparing silica-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. It is also called a phase change energy storage material. Organic phase change materials have moderate phase change temperature, high latent heat of phase change, and no overcooling. They are widely used in smart insulation materials. Microcapsule phase change material is a phase change material that uses microcapsule technology to coat a layer of polymer material or inorganic material on the outside of the phase change material to form a core-shell structure. Coating the organic phase change material in the inorganic material to form a microcapsule phase change material can not only imp...

Claims

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Application Information

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