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Polyethylene glycol/MnO2 nanowire composite phase change material as well as preparation and application thereof

A technology of composite phase change material and polyethylene glycol is applied in the field of preparation of polyethylene glycol/MnO2 nanowire composite material, which can solve the problems of difficult separation and the like, and achieve the effects of long cycle life and low requirements on process conditions.

Inactive Publication Date: 2020-02-21
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, latent heat storage and chemical reaction heat storage are often accompanied by temperature changes, that is, they are mixed with sensible heat storage and difficult to separate

Method used

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  • Polyethylene glycol/MnO2 nanowire composite phase change material as well as preparation and application thereof
  • Polyethylene glycol/MnO2 nanowire composite phase change material as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Take 1.58g KMnO 4 and 5.07gMnSO 4 ·H 2 O was dissolved in 50ml of deionized water respectively, and the two dissolved solutions were mixed, put into a water bath and heated to 90°C for 4h.

[0022] (2) After the reaction, the obtained precipitate was centrifuged and washed 7 times with absolute ethanol and distilled water until the product was neutral, and then the obtained sample was dried in an oven at 80°C for 12 hours to finally obtain a powder sample.

[0023] (3) Weigh the MnO obtained from (2) 2 0.05 g of the powdered sample and 0.45 g of polyethylene glycol with a molecular weight of 1500 were placed in a small beaker, and then the beaker was placed in a vacuum drying oven and heated at 80° C. until the polyethylene glycol melted. Adsorb for 2.5 hours under vacuum (relative vacuum: 0.10MPa), then take out the beaker and stir with a glass rod to make the MnO 2 The nanowires can fully absorb polyethylene glycol, and then put the beaker back into the vacuum...

Embodiment 2

[0027] (1) Take 1.58g KMnO 4 and 5.07gMnSO 4 ·H 2 O was dissolved in 50ml of deionized water respectively, and the two dissolved solutions were mixed, put into a water bath and heated to 90°C for 4h.

[0028] (2) After the reaction, the obtained precipitate was centrifuged and washed several times with absolute ethanol and distilled water until the product appeared neutral, and then the obtained sample was dried in an oven at 80°C for 12 hours to finally obtain a powder sample.

[0029] (3) Weigh the MnO obtained from (2) 2 0.05 g of the powdered sample and 0.45 g of polyethylene glycol with a molecular weight of 1500 were placed in a small beaker, and then the beaker was placed in a vacuum drying oven and heated at 80° C. until the polyethylene glycol melted. Adsorb for 2.5 hours under vacuum (relative vacuum: 0.10MPa), then take out the beaker and stir with a glass rod to make the MnO 2 The nanowires can fully absorb polyethylene glycol, and then put the beaker back into...

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Abstract

The invention discloses a preparation method of a composite phase change thermal storage material. According to the method, polyethylene glycol is taken as a phase change material, a MnO2 nanowire prepared with an oxidation-reduction precipitation method is used as a supporting carrier, and the composite phase change material is synthesized by vacuum impregnation. The composite phase change material synthesized with the method has the advantages of stable latent heat of phase change, good stability and low preparation cost and application of the composite phase change material in the aspect ofthermal storage is facilitated.

Description

technical field [0001] The invention belongs to a kind of polyethylene glycol / MnO that can be used as heat storage temperature adjustment phase change material 2 Preparation method of nanowire composite materials, especially related to the synthesis of network-like MnO by redox precipitation 2 A method for preparing an organic / inorganic composite material with nanowires coated with polyethylene glycol. Background technique [0002] With the continuous development of human society and economy and a large amount of energy consumption, energy conservation and environmental protection have become a topic of global concern. The development and utilization of new energy and the improvement of energy efficiency have become the focus of research and development in various countries. The use of heat storage materials to balance energy supply and demand can effectively improve energy efficiency and achieve the purpose of energy saving and environmental protection. It has broad appl...

Claims

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Application Information

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IPC IPC(8): C09K5/06B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C09K5/063
Inventor 史全解卓学
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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