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A kind of flame-retardant phase change energy storage microcapsule and preparation method thereof

A phase change energy storage and microcapsule technology, applied in microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., can solve the problem of low crosslinking density of phase change microcapsule walls, difficult to control and reduce the free radical polymerization process. The energy storage density of phase change microcapsules can make up for the problems of flammability, easy industrial production and high packaging efficiency.

Active Publication Date: 2022-04-12
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patent CN 105542721 A discloses a method for preparing flame-retardant phase-change microcapsules. The flame-retardant phase-change microcapsules are prepared by mixing flame retardant chlorinated paraffin into organic phase-change materials, but the flame-retardant and organic phase-change The physical blending of substances reduces the content of phase-change substances in the microcapsules, thereby reducing the energy storage density of the phase-change microcapsules
[0006] Chinese patent CN 103740337A prepares a phosphonate functional monomer, and prepares another flame-retardant microcapsule material by radical polymerization with acrylic acid monomer, but the preparation process of the microcapsule is cumbersome and the free radical polymerization The process is difficult to control, and the prepared phase change microcapsules have low cross-linking density

Method used

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  • A kind of flame-retardant phase change energy storage microcapsule and preparation method thereof
  • A kind of flame-retardant phase change energy storage microcapsule and preparation method thereof
  • A kind of flame-retardant phase change energy storage microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing flame-retardant phase-change energy storage microcapsules, comprising the steps of:

[0031] S1. 1mol of N,N-bis(2-hydroxyethyl)aminomethylenephosphonic acid diethyl ester, 5mol of polypropylene glycol with a molecular weight of 2000, 2g of dibutyltin dilaurate and 10mol of isophorone diisocyanate were added to In a three-necked flask, heat up to 100° C. and stir for 1 h to obtain a polyurethane prepolymer terminated by isocyanate (-NCO) groups;

[0032] S2. After mixing 0.6Kg of the polyurethane prepolymer prepared in S1 with 1Kg of octadecane, add 3Kg of deionized water and 0.1Kg of sodium dodecylsulfonate, at 30°C and 10000r / min Stir for 10min to obtain a stable oil-in-water emulsion;

[0033]S3. Add 0.1 mol triethylenetetramine dropwise to the oil-in-water emulsion prepared in S2 within 5 minutes at a speed of 30°C and 100r / min, raise the temperature to 60°C and react for 0.5h, pump under reduced pressure Filter and wash with deionized water...

Embodiment 2

[0044] A method for preparing flame-retardant phase-change energy storage microcapsules, comprising the steps of:

[0045] S1. 1mol of N,N-bis(2-hydroxyethyl)aminomethylene phosphonic acid diethyl ester, 10mol of polytetrahydrofuran diol with a molecular weight of 1000, 5g of stannous octoate and 20mol of diphenylmethane diisocyanate were added to In a three-necked flask, heat up to 60° C. and stir for 4 hours to obtain a polyurethane prepolymer terminated by isocyanate (-NCO) groups;

[0046] S2. After mixing 0.5Kg of the polyurethane prepolymer prepared in S1 with 1Kg of octadecane, add 8Kg of deionized water and 0.01Kg of sodium dodecylbenzenesulfonate, at 40°C and 6000r / min Stir for 30min to obtain a stable oil-in-water emulsion;

[0047] S3. Add 0.2 mol of ethylenediamine dropwise to the oil-in-water emulsion prepared in S2 within 10 minutes at 40°C and a speed of 1000r / min, raise the temperature to 50°C for 2 hours, filter under reduced pressure and use The filter cake...

Embodiment 3

[0050] A method for preparing flame-retardant phase-change energy storage microcapsules, comprising the steps of:

[0051] S1. 1mol N,N-bis(2-hydroxyethyl)aminomethylene phosphonic acid diethyl ester, 1mol molecular weight is 2000 adipic acid series polyester diol, 3g organozinc and 3mol toluene diisocyanate In a three-necked flask, heat up to 70° C. and stir for 2 hours to obtain a polyurethane prepolymer terminated by isocyanate (-NCO) groups;

[0052] S2. After mixing 0.2Kg of the polyurethane prepolymer prepared in S1 with 1Kg of dodecanol, add 5Kg of deionized water, 0.03Kg of Tween-20 and 0.03Kg of Tween-80, at 25°C and a speed of 3000r / min Stir for 20 minutes under the same conditions to obtain a stable oil-in-water emulsion;

[0053] S3. Add 0.3mol 3,3'-dichloro-4,4'-diaminodiphenylmethane to the oil-in-water prepared in S2 within 30min under the conditions of 25°C and 500r / min. In the emulsion, the temperature was raised to 30° C. to react for 4 hours, filtered unde...

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Abstract

The invention provides a flame-retardant phase-change energy storage microcapsule and a preparation method thereof, and relates to the technical field of energy-saving materials. The capsule comprises an organic phase-change material and a capsule wall wrapping the organic phase-change material; the general formula of the organic phase-change material is C n H 2n+2 alkanes, the general formula is C n H 2n The higher fatty alcohol of OH, the general formula is C n H 2n One or more of the higher fatty acids of COOH, wherein n=12~28; the capsule wall is made of N,N-bis(2-hydroxyethyl)aminomethylenephosphonate diethyl ester, polyol, polyisocyanate and polyamines. The flame-retardant phase-change microcapsules of the invention use phosphorus-containing polyurethane / polyurea resin as the wall material, which greatly improves the flame-retardant performance of the phase-change microcapsules, makes up for the flammability of organic phase-change materials, and expands the Application of phase change materials in the field of energy storage. The invention has the advantages of simple and easily controllable reaction process, short production period and low production cost.

Description

technical field [0001] The invention relates to the technical field of energy-saving materials, in particular to a flame-retardant phase-change energy storage microcapsule and a preparation method thereof. Background technique [0002] With the rapid development of human society, the shortage of traditional fossil energy and environmental pollution are becoming more and more serious. The development of new renewable and clean energy and the improvement of energy utilization have become urgent issues for scientific researchers. Phase-change energy storage materials are a class of functional materials that absorb and release heat through phase transitions to achieve temperature regulation and energy storage. The thermal energy storage system based on phase change energy storage materials can store excess energy and release it when needed, thereby overcoming the contradiction of energy supply imbalance and improving energy utilization. It is widely used in solar thermal convers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/16C09K5/06
CPCB01J13/16C09K5/06
Inventor 杜晓声王海波杜宗良成煦
Owner SICHUAN UNIV
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