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Preparation method of metal organic framework based composite phase-change material

A technology of metal-organic framework and composite phase change materials, applied in heat exchange materials, chemical instruments and methods, reagents, etc., can solve the problems of poor adjustability and single selection of core materials, and achieve leakage prevention, simple process, The effect of mild reaction conditions

Inactive Publication Date: 2014-04-30
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the above characteristics of metal-organic framework materials, the development of a new metal-organic framework-based composite phase change material can effectively overcome the shortcomings of existing phase change materials, such as poor structure adjustability and single selection of core materials, and has broad application prospects.

Method used

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  • Preparation method of metal organic framework based composite phase-change material
  • Preparation method of metal organic framework based composite phase-change material
  • Preparation method of metal organic framework based composite phase-change material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Dissolve 2 mmol of chromium nitrate and 2 mmol of terephthalic acid in 15 mL of deionized water, add 5 mmol of sodium hydroxide, stir at room temperature for 30 minutes, and transfer them to the reactor. React for 12 h at ℃, filter and wash, dry in a vacuum drying oven at 60 ℃ for 24 h to obtain (Cr)MIL-101-NH 2 Metal organic framework material matrix.

[0029] (2) Dissolve 0.5 g of PEG2000 in 30 mL of absolute ethanol, dissolve it completely under stirring, and stir at 80 ℃ for 3 h to obtain a homogeneous solution. Add 0.125 g of (Cr)MIL-101-NH prepared above 2 Vacuum 4 h at 100 ℃ to completely open the pores of the substrate. Then the vacuumized (Cr)MIL-101-NH 2 Disperse in the prepared PEG2000 solution, stir at 80 ℃ for 6 h, then put it in a drying box, dry at 60 ℃ for 36 h, to obtain (Cr)MIL-101-NH 2 Load PEG composite phase change material.

[0030] The obtained (Cr)MIL-101-NH 2 See the SEM picture of the PEG-loaded composite phase change material figure 1 , See th...

Embodiment 2

[0032] (1) Dissolve 1.7 mmol of zirconium chloride and 1.7 mmol of 2-aminoterephthalic acid in 25 mL of a mixed solution of N, N-dimethylformamide and deionized water (N, N-dimethyl The volume ratio of formamide and deionized water is 199:1), add 850 mmol of acetic acid, disperse ultrasonically at 60 ℃ for 30 min, then react at 120 ℃ for 24 h, centrifuge and wash, and dry at 60 ℃ in vacuum (Zr)UIO-66-NH is obtained after drying in the box for 24 h 2 Metal organic framework material matrix.

[0033] (2) Dissolve 8 g of lithium nitrate in 10 mL of deionized water, dissolve it completely under stirring conditions, and stir at 40 ℃ for 3 h to obtain a homogeneous solution. Put 3.5 g of (Zr) UIO-66-NH prepared above 2 Vacuum 4 h at 100 ℃ to completely open the pores of the substrate. Then the vacuumized (Cr)MIL-101-NH 2 Disperse in the prepared lithium nitrate solution, stir at 80 ℃ for 6 h, then put it in a drying box, and dry at 110 ℃ for 20 h. The resulting product was placed in ...

Embodiment 3

[0035] (1) Fully dissolve 1 mmol of chromium nitrate and 1 mmol of terephthalic acid in 4.8 mL of deionized water, add 4.5 mmol of hydrofluoric acid, and stir at room temperature for 30 minutes, then move them to the reaction kettle, The reaction was carried out at ℃ for 6 h, filtered and washed, and dried in a vacuum drying oven at 60 ℃ for 24 h to obtain (Cr)MIL-101 metal organic framework material matrix.

[0036] (2) Dissolve 0.4 g of calcium chloride hexahydrate in 15 mL of absolute ethanol, dissolve it completely under stirring, and stir at 80 ℃ for 3 h to obtain a homogeneous solution. 0.1 g of the (Cr)MIL-101 prepared above was evacuated at 100 ℃ for 4 h to completely open the pores of the substrate. Then disperse the vacuum-treated (Cr)MIL-101 in the prepared calcium chloride hexahydrate solution, stir at 80 ℃ for 6 h, then put it in a dry box, put it in the refrigerator at 5 ℃ 15 h, dried at 25 ℃ for 48 h to obtain (Cr)MIL-101-NH 2 Load calcium chloride hexahydrate co...

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Abstract

The invention relates to a preparation method of a metal organic framework based composite phase-change material. The method comprises the steps that a metal organic framework material substrate is prepared selectively; hole diameter size design and hole channel polarity regulation and control are performed on the substrate according to the size and the kind of a core material, so that a phase-change core material to be loaded is matched better; the soluble phase-change core material is prepared into a solution; a metal organic framework material is dispersed in the prepared phase-change material solution; a phase-change material is adsorbed by utilizing an extra-large specific surface area and a nano hole channel structure of the metal organic framework material; drying is performed; and then the metal organic framework composite phase-change material with a shaping effect is obtained. According to the method, a novel metal organic framework based composite phase-change material is developed; the prepared metal organic framework based composite phase-change material can effectively avoid leakage and the like, and has the advantages of adjustable nano hole structure and wide core material selection range; the method is simple in technology and mild in reaction condition, and is suitable for scale production; and a raw material is cheap and easy to obtain.

Description

Technical field [0001] The invention belongs to the field of nano composite materials and composite phase change materials, and specifically relates to a preparation method of a metal organic framework-based composite phase change material. Background technique [0002] Since entering the industrial society, traditional energy has been consumed at an alarming rate, and mankind is facing an energy crisis. Due to population reasons, the per capita energy reserves in our country are low, and the energy crisis is particularly prominent in our country. Moreover, traditional energy use will also cause environmental pollution and release a large amount of greenhouse gases to worsen the climate. The deteriorating environment and climate have made mankind aware of the importance of saving energy, searching for new energy, and protecting the environment. Therefore, mankind has developed new renewable energy sources such as solar energy, wind energy, biological energy, and ocean energy. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCY02P20/141
Inventor 王戈马倩倩汤甲栾奕范爽李洁张晓伟禹杰齐悦
Owner UNIV OF SCI & TECH BEIJING
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