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Microcapsule phase change fluid applied to heating system of building and preparation method of microcapsule phase change fluid

A technology of phase change fluid and heating system, which is applied in the field of composite material science and new energy, can solve the problems of low heat storage, serious stratification, inability to use building heating system, etc., and achieve the effect of stable fluid dynamic performance

Inactive Publication Date: 2016-09-28
TAIYUAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems that the existing microcapsule phase change materials have low heat storage, small fluid heat transfer coefficient, prominent supercooling phenomenon, and serious delamination phenomenon, which cannot be used in building heating systems, the present invention provides a kind of material suitable for building heating systems. Microcapsule phase change fluid for thermal system and preparation method thereof

Method used

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  • Microcapsule phase change fluid applied to heating system of building and preparation method of microcapsule phase change fluid
  • Microcapsule phase change fluid applied to heating system of building and preparation method of microcapsule phase change fluid
  • Microcapsule phase change fluid applied to heating system of building and preparation method of microcapsule phase change fluid

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Embodiment 1

[0021] A microcapsule phase-change fluid suitable for building heating systems is made of the following raw materials in weight percentages: 30% of Pickering emulsion, 10% of phase-change microcapsules, 0.8% of multi-walled carbon nanotubes, 0.05% of drag reducer, The rest is water, and the specific preparation method is as follows:

[0022] (1) Preparation of Pickering emulsion: the hydrophilic and lipophilic nano-SiO 2 Disperse 1.0g of particles in deionized water to form a water phase; pour 5 ml of ethyl acetate into the same amount of polyoxypropylene glycol to form an oil phase, then mix the oil and water phases, and then add emulsifier benzylphenol polyoxyethylene Ether 1ml, stirred for 50min, a stable Pickering emulsion was obtained;

[0023] (2) Pretreatment of multi-walled carbon nanotubes: using ultrasonic oscillation to order the agglomeration structure of CNTs, and then using F e nton reagent modification method, react at room temperature for 5 h, filter with suc...

Embodiment 2

[0027] A microcapsule phase-change fluid suitable for building heating systems is made of the following raw materials in weight percentages: 35% of Pickering emulsion, 8% of phase-change microcapsules, 1.0% of multi-walled carbon nanotubes, 0.1% of drag reducer, The rest is water, and the specific preparation method is as follows:

[0028] (1) Preparation of Pickering emulsion: the hydrophilic and lipophilic nano-SiO 2 Disperse 1.0g of particles in deionized water to form a water phase; pour 5 ml of ethyl acetate into the same amount of polyoxypropylene glycol to form an oil phase, then mix the oil and water phases, and then add emulsifier benzylphenol polyoxyethylene Ether 1ml, stirred for 50min, a stable Pickering emulsion was obtained;

[0029] (2) Pretreatment of multi-walled carbon nanotubes: using ultrasonic oscillation to order the agglomeration structure of CNTs, and then using F e nton reagent modification method, react at room temperature for 5 h, filter with suction...

Embodiment 3

[0033] A microcapsule phase-change fluid suitable for building heating systems is made of the following raw materials in weight percentage: 32% of Pickering emulsion, 9% of phase-change microcapsules, 0.9% of multi-walled carbon nanotubes, 0.08% of drag reducer, The rest is water, and the specific preparation method is as follows:

[0034] (1) Preparation of Pickering emulsion: the hydrophilic and lipophilic nano-SiO 2 Disperse 1.0g of particles in deionized water to form a water phase; pour 5 ml of ethyl acetate into the same amount of polyoxypropylene glycol to form an oil phase, then mix the oil and water phases, and then add emulsifier benzylphenol polyoxyethylene Ether 1ml, stirred for 50min, a stable Pickering emulsion was obtained;

[0035] (2) Pretreatment of multi-walled carbon nanotubes: using ultrasonic oscillation to order the agglomeration structure of CNTs, and then using F e nton reagent modification method, react at room temperature for 5 h, filter with sucti...

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Abstract

The invention relates to the technical fields of composite material science and novel energy sources, and particularly discloses a microcapsule phase change fluid applied to a heating system of a building and a preparation method ofthe microcapsule phase change fluid. The problem of inapplicability of an existing material with low heat storage capacity, low fluid heat transfer coefficient, fierce overcooling phenomenon and serious demixing phenomenon to the heating system of the building is solved. The microcapsule phase change fluid is prepared from Pickering emulsion, a phase change microcapsule, a multi-walled carbon nanotube, a drag reducer and water by the steps of preparing the Pickering emulsion and the multi-walled carbon nanotube for pretreatment, and implementing synthesis of the phase change microcapsule and synthesis of microcapsule phase change fluid in the Pickering emulsion by adopting an in-situ polymerization method, wherein the phase change temperature of the phase change fluid is about 60 DEG C, the heat storage capacity reaches 180J / g, the heat transfer coefficient is 2 to 3 times that of an ordinary phase change fluid, the overcooling degree is lower than 1.0 DEG C, the fluid is stable in dynamic performance and free of demixing and capsule breaking, and the material properties completely meet the requirements on a fluid for the heating system of the building, so that the microcapsule phase change fluid is an ideal phase change fluid applied to the heating system of the building.

Description

technical field [0001] The invention relates to the fields of composite material science and new energy technology, in particular to a microcapsule phase-change fluid suitable for building heating systems and a preparation method thereof. Background technique [0002] Phase change material (PCM, phase change material) undergoes a phase change in a specific temperature range, absorbs or releases heat through the phase change, realizes heat storage and temperature regulation, and adjusts and controls the temperature of the working source or the surrounding environment of the material. Solid-liquid phase change materials such as higher alkanes, higher alcohols, higher acids, and higher esters are easy to flow during the phase change process, and are easy to mix with surrounding substances, which is limited in practical applications. Microencapsulation is the solution to this problem one of the effective methods. [0003] During the phase change process of the phase change micr...

Claims

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Application Information

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IPC IPC(8): B01J13/18F24D11/00
CPCB01J13/18F24D11/001
Inventor 朱开金谭俊华赵彦亮刘菲李鹏米增财赵旭东
Owner TAIYUAN INST OF TECH