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Organic-inorganic hybrid paraffin/silicon dioxide/modified illite powder phase change microcapsule as well as preparation method and application thereof

A phase change microcapsule, silica technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of low foam tear strength, high foam density, and uneven cells. To achieve the effect of superior durability and stability, good thermal insulation performance, easy flow and leakage

Active Publication Date: 2022-07-22
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an organic-inorganic hybrid paraffin / silicon dioxide / modified illite powder phase-change microcapsule and its preparation method and application, which solves the problem of organic silicon composite phase-change foaming materials. Paraffin wax is easy to leak, the density of the foam is high, the cells are uneven, and the tear strength of the foam is low

Method used

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  • Organic-inorganic hybrid paraffin/silicon dioxide/modified illite powder phase change microcapsule as well as preparation method and application thereof
  • Organic-inorganic hybrid paraffin/silicon dioxide/modified illite powder phase change microcapsule as well as preparation method and application thereof
  • Organic-inorganic hybrid paraffin/silicon dioxide/modified illite powder phase change microcapsule as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation method of paraffin / silicon dioxide / modified illite powder phase change microcapsules is as follows:

[0047] S1. Use gravity separation method to separate illite to obtain purified illite (the main method is: add 2g illite to 40mL of distilled water, continue magnetic stirring after ultrasonication to make it evenly dispersed, use plastic wrap for the beaker After sealing, let stand, discard the supernatant, transfer the intermediate suspension and bottom impurities to a desktop centrifuge for solid-liquid separation. After drying, the purified illite is obtained);

[0048]S2. Take 0.1 g of sodium carbonate as the sodium modification agent, and after obtaining sodium-based modified illite, add 0.5 g of cetyltrimethylammonium bromide, continue stirring at 80 °C for 7 hours, and finally dry at 100 °C, That is to obtain modified illite;

[0049] S3. Cut 10 g of paraffin into pieces with a knife, take 0.1 g of modified illite and prepare a modified illite ...

Embodiment 2

[0056] The preparation method of paraffin / silicon dioxide / modified illite powder phase change microcapsules is as follows:

[0057] S1. Use gravity separation method to separate illite to obtain purified illite (mainly: add 3 g of illite to 60 mL of distilled water, continue magnetic stirring after ultrasonication to make it evenly dispersed, use plastic wrap for the beaker After sealing, let stand, discard the supernatant, transfer the intermediate suspension and bottom impurities to a desktop centrifuge for solid-liquid separation. After drying, the purified illite is obtained);

[0058] S2. Take 0.1 g of sodium carbonate as the sodium modification agent, and after obtaining sodium-based modified illite, add 0.5 g of cetyltrimethylammonium bromide, continue stirring at 80 °C for 7 hours, and finally dry at 100 °C, That is to obtain modified illite;

[0059] S3. Cut 10 g of paraffin wax into pieces with a knife, take 0.2 g of modified illite and prepare a modified illite so...

Embodiment 3

[0065] Prepare a new type of phase change silicone rubber foam material according to the following proportions

[0066] Liquid silicone rubber (107 silicone rubber) A: 10g, hydrogen-containing silicone oil: 2g, methyl silicone oil: 0.2g, liquid silicone rubber B: 2.7, phase change microcapsule: 5g

[0067] Implementation process: First, mix liquid silicone rubber, hydrogen-containing silicone oil and methyl silicone oil with a mass of 10g, 2g, and 0.2g as component A, add 5g of microcapsule phase change material solid powder to component A, and add 2.7g of liquid silicone rubber containing 0.3% Pt catalyst was named as component B, then component A was transferred to component B, and stirred rapidly with an electric stirrer for about 60s, and the above mixture was immediately put into the temperature of 60 ℃. A new type of composite phase change silicone rubber foam material was obtained after curing for 40 min in a vacuum oven.

[0068] Product properties of the obtained com...

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Abstract

The invention discloses an organic-inorganic hybrid paraffin / silicon dioxide / modified illite powder phase change microcapsule as well as a preparation method and application thereof, and belongs to the field of preparation and application of novel functional phase change additives. The method comprises the following steps: S1, purifying illite; s2, modifying the illite; and S3, preparing the paraffin / silicon dioxide / modified illite powder phase change microcapsule. According to the synthesis method, the silicone rubber foam material is selected as a carrier and applied to the composite phase change material, energy storage can be achieved, the heat insulation performance and the use safety of the composite phase change material can be improved, paraffin is microencapsulated, the defect that paraffin is prone to leakage is overcome, the low-price illite is added, and the composite phase change material is prepared. Compared with a silicone rubber foam material synthesized by a traditional method, the density is smaller, and the thermal insulation performance is more excellent.

Description

technical field [0001] The invention relates to an organic-inorganic hybrid paraffin / silicon dioxide / modified illite powder phase change microcapsule, a preparation method and application thereof, and mainly relates to the preparation and application fields of novel functional phase change additives, as well as green energy-saving phase change composite Preparation and application of foamed materials. Background technique [0002] Paraffin has the characteristics of low price, high energy storage density and stable phase change behavior. It is an ideal phase change material for environmental protection and energy saving for solar energy and waste heat utilization. However, due to the large volume change of paraffin during solid-liquid phase transition, it is easy to flow and leak. Therefore, it is one of the effective ways to overcome the shortcomings of paraffin by encapsulating the paraffin in the wall material. At present, organic substances such as polymers, chitosan a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K5/01C09K5/06C08L83/04C08L83/05C08J9/00
CPCC08K9/10C08K5/01C09K5/063C08J9/009C08J9/0061C08J2383/04C08J2483/05Y02E60/14
Inventor 李明张书华刘伟军
Owner SHANGHAI UNIV OF ENG SCI
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