Preparation method of titanium dioxide loaded graphene base phase-change microcapsule

A technology of phase-change microcapsules and titanium dioxide, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., and can solve the problems of not being dispersed and easy agglomeration of graphene

Inactive Publication Date: 2017-06-13
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the graphene added to the prepolymer is prone to agglomeration and is not well dispersed.

Method used

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  • Preparation method of titanium dioxide loaded graphene base phase-change microcapsule
  • Preparation method of titanium dioxide loaded graphene base phase-change microcapsule

Examples

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Embodiment 1

[0027] A preparation method of titanium dioxide-supported graphene-based phase-change microcapsules, comprising the following steps:

[0028] (1) prepare a graphene oxide solution; get a certain amount of graphene oxide and dissolve it in an organic solvent, ultrasonically, and disperse;

[0029] (2) Preparation of fatty acid solution: Weigh 20g of phase change material and place it in a three-necked flask, then add 250ml of organic solvent and 5% surfactant, stir at a speed of 1200rpm to obtain an emulsion;

[0030] (3) Preparation of graphene oxide-coated phase change material: fix the above-mentioned three-necked flask in a constant temperature oil bath, set the reaction temperature to 60°C, add the solution in (1) into the three-necked flask, and add a catalyst at the same time to stir to oxidize Graphene attached to the surface of the phase change material droplet;

[0031] (4) Titanium dioxide deposition: cool down the above mixed solution, then treat it at a constant t...

Embodiment 2

[0033] Such as figure 1 with 2 Shown, a kind of preparation method of titanium dioxide supported graphene-based phase change microcapsules, comprises the following steps:

[0034] (1) prepare a graphene oxide solution; get a certain amount of graphene oxide and dissolve it in an organic solvent, ultrasonically, and disperse;

[0035] (2) Preparation of paraffin wax solution: take 15g of phase change material and place it in a three-necked flask, then add 250ml of organic solvent and 5% surfactant, the surfactant is a compound Span-Tween emulsion, at a speed of 1000rpm Stir to obtain an emulsion;

[0036] (3) Preparation of graphene oxide-coated phase change material: fix the above-mentioned three-necked flask in a constant temperature oil bath, set the reaction temperature to 60°C, add the solution in (1) into the three-necked flask, and add a catalyst at the same time to stir to oxidize Graphene attached to the surface of the phase change material droplet;

[0037] (4) Ti...

Embodiment 3

[0039] A preparation method of titanium dioxide-supported graphene-based phase-change microcapsules, comprising the following steps:

[0040] (1) prepare a graphene oxide solution; get a certain amount of graphene oxide and dissolve it in an organic solvent, ultrasonically, and disperse;

[0041] (2) Preparation of paraffin wax solution: Weigh 20g of n-eicosane and place it in a three-necked flask, then add 250ml of organic solvent and 5% surfactant, the surfactant is sodium dodecylsulfonate, and carry out at a speed of 1100rpm stirring to obtain emulsion;

[0042] (3) Preparation of graphene oxide-coated phase change material: fix the above-mentioned three-necked flask in a constant temperature oil bath, set the reaction temperature to 60°C, add the solution in (1) into the three-necked flask, and add a catalyst at the same time to stir to oxidize Graphene attached to the surface of the phase change material droplet;

[0043] (4) Titanium dioxide deposition: lower the tempe...

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Abstract

The invention discloses a preparation method of a titanium dioxide loaded graphene base phase-change microcapsule. The preparation method comprises the following steps: (1) preparing graphene oxide through a Hummer method; (2) weighing phase-change materials of fatty acid, multielement alkane and the like, dispersing into an organic solution with a proper amount of surfactant added, and performing ultrasonic dispersion; (3) weighing the graphene oxide prepared in the step (1), adding into the solution, adding a catalyst, and performing stirring treatment at a constant temperature; and (4) slowly and dropwisely adding a certain amount of tetrabutyl titanate into the solution, adding a certain ratio of deionized water, sufficiently hydrolyzing the tetrabutyl titanate under a weak acid condition, then performing vacuum filtration, washing, and performing vacuum drying treatment to obtain the titanium dioxide/graphene compound phase-change material. The method is simple in preparation process; and the prepared phase-change microcapsule has a favorable thermal insulation effect, also has excellent photocatalytic performance, and can be easily popularized and applied in the paint industry.

Description

technical field [0001] The invention belongs to the field of preparation of multifunctional phase change materials, relates to a preparation technology of titanium dioxide / graphene composite phase change materials, and applies it to the coating industry. Background technique [0002] Phase change materials absorb or release a large amount of heat during the phase change process, which can realize energy conversion, storage and utilization, and are currently widely used in energy-saving energy storage, building insulation, aerospace and other fields. Phase change materials are divided into solid-solid phase change and solid-liquid phase change according to the phase change form, among which solid-liquid phase change is the most widely used. However, such materials are prone to leakage during the phase change process, and microencapsulation of phase change materials is one of the effective methods to solve this problem. [0003] With the development of social industrializatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/02B01J13/22B01J21/18
CPCC09K5/063B01J13/02B01J13/22B01J21/18B01J35/004
Inventor 李敏王同堂
Owner SOUTHEAST UNIV
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