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Dual phase change energy storage material and preparation method thereof

An energy storage material and dual-phase transition technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve problems such as leakage, water pollution, unrecoverable emulsifier, etc. The effect of temperature regulation not matching seasonal changes

Inactive Publication Date: 2019-05-24
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, two kinds of long-chain alkanes are selected as phase change materials at the same time. Through the method of soap-free miniemulsion polymerization, the polymers are used as shells to encapsulate them at the nanometer scale, which can achieve more flexible temperature control. To a certain extent Solve the problem of mismatch between temperature regulation and seasonal changes; select a polymerizable emulsifier with double bonds, which will become a part of the capsule after the reaction, which solves the shortcomings of traditional emulsifiers that cannot be recycled and adhere to water after breaking the emulsifier, causing water pollution. Taking into account product performance and environmental friendliness; compared with traditional large-scale materials, it can increase the heat transfer area, have better heat transfer advantages, improve energy utilization efficiency, and solve the leakage problem of phase change materials to a certain extent

Method used

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  • Dual phase change energy storage material and preparation method thereof
  • Dual phase change energy storage material and preparation method thereof
  • Dual phase change energy storage material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0051] Mix 2g of polymerizable emulsifier allyloxynonylphenol polyoxyethylene (10) ether ammonium sulfate (DNS-86) with 80g of deionized water, and use a high-speed disperser to shear at a speed of 5000rpm for 15min. Then it was added into an ultrasonic cell disruptor, and dispersed for 15 minutes at an amplitude of 60%, to obtain an aqueous phase; wherein, the mass of the emulsifier was 2.4% of the mass of the aqueous phase. 6.6g of monomer (styrene: divinylbenzene=80%:20%), 13.4g of n-octadecane (n-ODE) and 0.2g of initiator azobisisobutyronitrile (AIBN) were mixed, Keep the temperature in a water bath at 30°C for 30 minutes to form an oil phase. The water phase was poured into the oil phase, stirred at a speed of 5000 rpm for 15 min, and the pre-emulsion was emulsified with an amplitude of 60% for 30 min using an ultrasonic cell breaker to obtain a fine emulsion. Pour the mini-emulsion into a 250ml four-neck flask, which has a feed port, a mechanical stirrer, a nitrogen in...

Embodiment 2

[0068] Mix 2g of polymerizable emulsifier allyloxynonylphenol polyoxyethylene (10) ether ammonium sulfate (DNS-86) with 85g of deionized water, and use a high-speed disperser to shear at a speed of 5000rpm for 15min. Then it was added into an ultrasonic cell breaker, and dispersed for 20 minutes at an amplitude of 60%, to obtain a water phase; wherein, the mass of the emulsifier was 2.3% of the mass of the water phase. With 8g monomer (styrene: divinylbenzene=70%: 30%), the n-octadecane (n-ODE) of 16g ​​and the initiator azobisisobutyronitrile (AIBN) of 0.5g are mixed, at 30 ℃ in a water bath for 30 min to form an oil phase. The water phase was poured into the oil phase, stirred at a speed of 5000 rpm for 15 min, and the pre-emulsion was emulsified with an amplitude of 60% for 30 min using an ultrasonic cell breaker to obtain a fine emulsion. Pour the mini-emulsion into a 250ml four-neck flask, which has a feed port, a mechanical stirrer, a nitrogen inlet and a reflux port, p...

Embodiment 3

[0072] Mix 2.5g of polymerizable emulsifier allyloxynonylphenol polyoxyethylene (10) ether ammonium sulfate (DNS-86) with 85g of deionized water, and use a high-speed disperser to shear at a speed of 5000rpm for 15min. Then it was added into an ultrasonic cell disruptor, and dispersed for 15 minutes at an amplitude of 60%, to obtain a water phase; wherein, the mass of the emulsifier was 2.8% of the mass of the water phase. With 8g monomer (styrene: divinylbenzene=70%: 30%), the n-octadecane (n-ODE) of 18g and the initiator azobisisobutyronitrile (AIBN) of 0.3g are mixed, at 30 ℃ in a water bath for 30 min to form an oil phase. The water phase was poured into the oil phase, stirred at a speed of 5000 rpm for 15 min, and the pre-emulsion was emulsified with an amplitude of 60% for 30 min using an ultrasonic cell breaker to obtain a fine emulsion. Pour the mini-emulsion into a 250ml four-neck flask, which has a feed port, a mechanical stirrer, a nitrogen inlet and a reflux port,...

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Abstract

The invention relates to a dual phase change energy storage material and a preparation method thereof. The dual-phase change energy storage material comprises first nanocapsules, second nanocapsules and a building carrier material, wherein the mass of the building carrier material is 30-50% of the composite phase change energy storage material; the mass ratio of the first and second nanocapsule is40-60%:60-40%; both the first and second nanocapsules are made with a main material, a monomer, an initiator and an emulsifier; the first and second nanocapsules are differed in the composition of the main material, and the two main materials are different two of higher alkanes, such as cetane, heptadecane, octadecane and eicosane. Compared with traditional large-scale materials, the dual phase change energy storage material has the advantages that heat transfer area can be enlarged, better heat transfer advantage is gained, energy utilization efficiency is improved, and the leakage problem of the phase change material is partly solved.

Description

technical field [0001] The invention relates to the field of environment-friendly building materials, in particular to a dual-phase change energy storage material and a preparation method thereof. Background technique [0002] Energy is the basis for human survival and development. With the development of science and technology, human's demand for energy is increasing day by day, but the fossil energy on which human beings depend for survival is limited. According to the BP World Energy Statistical Yearbook released in June 2013, the world's remaining oil resources can only be exploited 52.9% In 2010, the necessity of energy saving and emission reduction became increasingly prominent. [0003] With the continuous improvement of people's living standards, the energy consumption (including cooling and heating) costs of buildings for people's daily living are getting higher and higher. In recent years, building walls made of single-phase change energy storage materials have a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 张旭赵满相李明坤尹雅萱王小梅
Owner HEBEI UNIV OF TECH
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