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Hybridization wall material nano-capsules made of phase change energy storage material and preparation method of hybridization wall material nano-capsules

A phase change energy storage material and nanocapsule technology, which is applied in the field of hybrid wall material nanocapsules of phase change energy storage materials and their preparation, can solve the problems of high brittleness and poor mechanical strength, and achieve regular morphology and little influence. , the effect of high yield

Active Publication Date: 2016-03-16
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with organic polymer wall materials, inorganic wall materials usually have the advantages of higher thermal conductivity, excellent thermal / chemical stability, non-combustibility, and no release of harmful gases, but there are also some obvious limitations, such as brittleness. Large, poor mechanical strength, often form porous structure, etc.
However, there are no published reports of NanoPCMs with organic-inorganic hybrid materials as wall materials

Method used

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  • Hybridization wall material nano-capsules made of phase change energy storage material and preparation method of hybridization wall material nano-capsules
  • Hybridization wall material nano-capsules made of phase change energy storage material and preparation method of hybridization wall material nano-capsules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In a 100 mL three-necked flask, add 1.0 g of n-octadecane, 0.75 mL of LTEOS, 0.375 mL of MPS, 0.375 mL of styrene, and 0.015 g of AIBN, and mix to form an oil phase. Thereafter, 28.5 mL of water and 14.2 mL of ethanol were sequentially added into the three-necked flask, and the water and ethanol were miscible as the water phase. Thereafter, 0.246 g of CTAB was added into the three-necked flask, and magnetically stirred at 35° C. for 30 min at a rotational speed of 1500 r / min. Then immediately use an ultrasonic cleaner (KQ-400KDB type, 100% amplitude) to sonicate at 35° C. for 10 min to form a stable miniemulsion. Nitrogen was passed into the three-necked flask for 30 minutes, and then 1.04 mL of ammonia water with a mass concentration of 25 wt % was added. Continue nitrogen protection, put the three-necked flask into an 80°C oil bath, and stir for 4 hours with a magnetic force at a stirring rate of 300r / min. During this process, TEOS and MPS undergo a hydrolysis-conde...

Embodiment 2

[0040] In a 1000mL beaker, add 10g of n-octadecane, 7.5mLTEOS, 3.75mL of MPS, 3.75mL of styrene, and 0.15g of AIBN to form an oil phase after miscibility. Thereafter, 285 mL of water and 142 mL of ethanol were added to the beaker successively, and the water and ethanol were miscible as the water phase. Thereafter, 2.46 g of CTAB was added into the beaker, and emulsified at 35° C. under high-speed shear (UltraTurrax T25 type, 10000 r / min) for 2 min. Then immediately use a sonicator (VCX-750 type, 40% amplitude) to sonicate at 35° C. for 10 min to form a stable miniemulsion. Pour the miniemulsion into a 500 mL three-necked bottle, pass nitrogen gas inside for 30 minutes, and then add 10.4 mL of ammonia water with a mass concentration of 25 wt%. The three-neck flask was continuously ventilated with nitrogen, and placed in an oil bath at 80°C, and magnetically stirred for 4 hours at a stirring rate of 300 r / min. During this process, TEOS and MPS undergo a hydrolysis-condensation...

Embodiment 3

[0042] In a 1000mL beaker, add 10g of n-butyl stearate, 10mL of vinyltrimethoxysilane, 5mL of methyl methacrylate, and 0.15g of tert-butyl hydroperoxide to form an oil phase after miscibility. Thereafter, 320 mL of water and 107 mL of ethanol were successively added into the beaker, and the water and ethanol were miscible as the water phase. Thereafter, 2.00 g of sodium lauryl sulfate was added into the beaker, and emulsified at 35°C for 2 min at high-speed shear (UltraTurrax T25 type, 10000 r / min). Then immediately use a sonicator (VCX-750 type, 40% amplitude) to sonicate at 35° C. for 10 min to form a stable miniemulsion. Pour the miniemulsion into a 500mL three-neck bottle, pass nitrogen gas inside for 30min, and then add 2.0mL of sodium hydroxide solution with a mass concentration of 5wt%. The three-neck flask was continuously ventilated with nitrogen, and placed in an oil bath at 80°C, and magnetically stirred for 3 hours at a stirring rate of 300 r / min. The reacted mix...

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Abstract

The invention discloses hybridization wall material nano-capsules made of a phase change energy storage material and a preparation method of the hybridization wall material nano-capsules. The preparation method specifically comprises the steps of mixing the phase change energy storage material, an alkoxy silane type compound, a vinyl monomer and an initiator to form an oil phase, adding a water phase and an emulsifier, emulsifying, then ultrasonically homogenizing to form miniemulsion, introducing nitrogen to remove oxygen, adding a basic catalyst, and stirring to react under a condition of closing or continuously introducing nitrogen for protection, thus obtaining a mixture of phase change energy storage material nano-capsules and the water phase; filtering the mixture, washing by deionized water, and drying, thus obtaining a powdery product. The product is regular in shape, has a particle size less than 1 mu. m, and is great in specific surface area, high in heat storage / release efficiency, high in enthalpy of phase change and heat stability, and capable of tolerating more than 1000 times of a core material melting-crystallization process; the product can be combined with multiple inorganic materials and organic polymers to prepare a thermoregulation composite material, and is good in compatibility and little in influence to mechanical property.

Description

technical field [0001] Embodiments of the present invention relate to capsules of phase-change energy storage materials, and more specifically, embodiments of the present invention relate to a hybrid wall material nanocapsule of phase-change energy storage materials and a preparation method thereof. Background technique [0002] Due to the scarcity and non-renewability of traditional fossil energy, the increasing world population, and the continuous growth of greenhouse gas emissions, efficient use of energy and the development of new energy storage technologies have become increasingly important. In recent decades, phase-change materials (PCMs) have received great attention because of their advantages of high heat storage density and near-isothermal heat storage, which can be used as clean and sustainable energy storage materials. Most PCMs store and release thermal energy through the solid-liquid phase transition process. In order to prevent their leakage in the molten sta...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F230/08C08F220/14C08F212/36C08K3/36C08K5/01C08K5/101C08K5/09C09K5/06
CPCC08F212/08C08F212/36C08F220/14C08F230/08C08K3/36C08K5/01C08K5/09C08K5/101C09K5/063
Inventor 梁书恩田春蓉祝亚林王建华陈可平贾晓蓉
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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