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Preparation method of vanadium dioxide organic composite microcapsule

A composite microcapsule and vanadium dioxide technology, which is applied in the direction of microcapsule preparation and microsphere preparation, can solve the problems that restrict the wide application of vanadium dioxide nanopowder, lose infrared control ability, and be easily oxidized, so as to improve the stability Performance and weather resistance, improved scope of application, and high encapsulation efficiency

Inactive Publication Date: 2020-03-24
UNIV OF JINAN +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, vanadium dioxide nanopowders are easily oxidized in the air and become vanadium pentoxide (V 2 o 5 ), losing the ability to control the infrared
This problem has restricted the wide application of vanadium dioxide nanopowders.

Method used

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  • Preparation method of vanadium dioxide organic composite microcapsule
  • Preparation method of vanadium dioxide organic composite microcapsule
  • Preparation method of vanadium dioxide organic composite microcapsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Dissolve 0.1 g vanadium dioxide nanopowder, 0.06 g ascorbic acid, 0.2 mL Tween80, 1 mL glutaraldehyde aqueous solution, 1 mL hydrochloric acid in 4 mL deionized water to form an internal aqueous phase, stir and disperse; dissolve 1.2 mL Span80 in 20 mL An oil phase is formed in n-octane; 0.2 mL Tween80 and 0.1 g wall material PVA-1799 are dissolved in 20 mL deionized water to form an outer water phase.

[0045] Add the inner water phase to the oil phase, shear at 6000 rpm for 40 min to obtain water-in-oil colostrum, add the colostrum dropwise to the outer water phase, raise the temperature to 60 ℃ and continue to stir at 1500 rpm for 5 h, the reaction After completion, the product was centrifuged, washed three times with deionized water and petroleum ether, and dried under vacuum at 45 ℃ to obtain microcapsules with an encapsulation rate of 85.4% and a load rate of 32.2%.

[0046] figure 1 This is the DSC chart of the vanadium dioxide organic composite microcapsules in Examp...

Embodiment 2

[0048] Dissolve 0.1 g vanadium dioxide nanopowder, 0.06 g catechol, 0.2 mL Tween80, 1 mL succinaldehyde aqueous solution, 1 mL acetic acid in 4 mL deionized water to form an internal water phase, stir and disperse; dissolve 1.2 mL Span80 The oil phase was formed in 20 mL cyclohexane; 0.2 mL Tween80, 0.1 g wall material PVA-1788 was dissolved in 20 mL deionized water to form the outer water phase.

[0049] Add the inner water phase to the oil phase, shear at 5000 rpm for 40 min to obtain water-in-oil colostrum, add the colostrum dropwise to the outer water phase, raise the temperature to 60 ℃ and continue stirring at 1000 rpm for 5 h, the reaction After completion, the product was centrifuged, washed three times with deionized water and petroleum ether, and dried in vacuum at 45 ℃ to obtain microcapsules with an encapsulation rate of 81.2% and a load rate of 31.1%.

Embodiment 3

[0051] Dissolve 0.1 g vanadium dioxide nanopowder, 0.06 g polyvinylpyrrolidone, 0.2 mL Tween80, 1 mL malondialdehyde aqueous solution, 1 mL sulfuric acid in 4 mL deionized water to form an internal aqueous phase, stir and disperse; dissolve 1.2 mL Span80 The oil phase was formed in 20 mL n-heptane; 0.2 mL Tween80 and 0.1 g wall material PVA-2088 were dissolved in 20 mL deionized water to form the outer water phase.

[0052] Add the inner water phase to the oil phase, shear at 4000 rpm for 30 min to obtain water-in-oil colostrum, add the colostrum dropwise to the outer water phase, raise the temperature to 60 ℃ and continue stirring at 2000 rpm for 5 h, the reaction After completion, the product was centrifuged, washed three times with deionized water and petroleum ether, and dried in vacuum at 45 ℃ to obtain microcapsules with an encapsulation rate of 83.0% and a load rate of 31.6%.

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Abstract

Belonging to the technical field of synthesis of nano polymer composite materials, the invention provides a vanadium dioxide organic composite microcapsule and a preparation method thereof. The preparation method includes the steps of: (1) preparing an internal water phase, (2) preparing an oil phase, (3) adding the inner water phase prepared in step (1) into the oil phase prepared in step (2) dropwise, and conducting stirring and shearing treatment to obtain a water-in-oil type primary emulsion, (4) preparing an external water phase, and (5) dropwise adding the water-in-oil type primary emulsion prepared in step (3) into the external water phase prepared in step (4), performing stirring at 20-100DEG C, and carrying out aftertreatment to obtain the vanadium dioxide organic composite microcapsule. The preparation method of the vanadium dioxide organic composite microcapsule provided by the invention is simple to operate, and the prepared vanadium dioxide organic composite microcapsule has high encapsulation efficiency and enhanced weather resistance, so that the dispersity of vanadium dioxide in paint is improved, and the industrial application range of vanadium dioxide nanopowder is widened.

Description

Technical field [0001] The invention belongs to the technical field of nano polymer composite material synthesis, and specifically relates to a vanadium dioxide organic composite microcapsule nano polymer composite material and a preparation method thereof. Background technique [0002] With the growth of the world’s population and the acceleration of social modernization, energy problems have become increasingly prominent, so the efficient use of energy is particularly important. It is estimated that in developed countries, building energy use accounts for 40% of total energy consumption, surpassing industry and transportation sectors, while heating, ventilation and air conditioning are the main components of building energy consumption, accounting for about 50% of total building energy consumption . Among all building components, windows are the main channel for energy exchange between the building and the environment. In order to reduce this part of energy consumption, smart...

Claims

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Application Information

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IPC IPC(8): B01J13/02
CPCB01J13/02
Inventor 蒋绪川姚伟赵修贤呼啸游淇聂永孙国新蒋清敏
Owner UNIV OF JINAN
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