Preparation method for carbon-containing material metal organic framework-based composite phase change material

A technology of metal-organic framework and composite phase-change materials, which is applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of poor heat transfer performance and single selection of core materials, and achieve improved heat transfer performance and heat transfer performance. Excellent performance and good cycle stability

Inactive Publication Date: 2015-07-01
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite phase change material can effectively overcome the shortcomings of the existing porous matrix composite phase change materials, such as poor heat transfer performance, poor structure adjustability, single core material selection, etc., and has broad application prospects

Method used

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  • Preparation method for carbon-containing material metal organic framework-based composite phase change material
  • Preparation method for carbon-containing material metal organic framework-based composite phase change material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0023] (1) Disperse 50mg of carbon nanotubes (CNT) into 40mL of PVP (average molecular weight 58000) aqueous solution (2mg mL -1 ), ultrasonically dispersed for 1 h, and then stirred overnight at room temperature. The precipitate was centrifuged and redispersed into 15 mL of water. Add 2mmol of chromium nitrate, 2mmol of terephthalic acid and 5mmol of sodium hydroxide to the mixture, stir at room temperature for 5min, move it to the reaction kettle, keep it at 150°C for 12h, filter and wash it, and put it under vacuum at 60°C CNTCr-MIL-101-NH was obtained after drying in a drying oven for 24 hours 2 carrier material.

[0024] (2) 0.107g of CNTCr-MIL-101-NH prepared above 2 Vacuumize at 150°C for 4 hours to remove small guest molecules in the pores. The carrier material after suction filtration was dispersed in 10 mL of absolute ethanol containing 0.25 g of PEG2000, and stirred at 60° C. for 2 h to obtain a homogeneous solution. Put the mixture in a drying oven at 80°C, ke...

Embodiment example 2

[0027] (1) Disperse 50mg of expanded graphite into 40mL of PVP (average molecular weight is 58000) aqueous solution (2mg mL -1 ), ultrasonically dispersed for 1 h, and then stirred overnight at room temperature. The precipitate was centrifuged and redispersed into 15 mL of water. Add 2mmol of chromium nitrate, 2mmol of terephthalic acid and 5mmol of sodium hydroxide to the mixture, stir at room temperature for 5min, move it to the reaction kettle, keep it at 150°C for 12h, filter and wash it, and put it under vacuum at 60°C After drying in a drying oven for 24 hours, expanded graphite Cr-MIL-101-NH was obtained 2 carrier material.

[0028] (2) 0.107g of the above-mentioned expanded graphite Cr-MIL-101-NH 2 Vacuumize at 150°C for 4 hours to remove small guest molecules in the pores. The carrier material after suction filtration was dispersed in 10 mL of absolute ethanol containing 0.25 g of stearic acid, and stirred at 80° C. for 2 h to obtain a homogeneous solution. Put t...

Embodiment example 3

[0030](1) Disperse 50mg of carbon fiber into 40mL of PVP (average molecular weight 58000) aqueous solution (2mg mL -1 ), ultrasonically dispersed for 1 h, and then stirred overnight at room temperature. The precipitate was centrifuged and redispersed in 15 mL of water. Add 2mmol of chromium nitrate, 2mmol of terephthalic acid and 5mmol of sodium hydroxide to the mixture, stir at room temperature for 5min, move it to the reaction kettle, keep it at 150°C for 12h, filter and wash it, and put it under vacuum at 60°C Carbon fiber Cr-MIL-101-NH was obtained after drying in a drying oven for 24 hours 2 carrier material.

[0031] (2) 0.107g of the above-prepared carbon fiber Cr-MIL-101-NH 2 Vacuumize at 150°C for 4 hours to remove small guest molecules in the pores. The carrier material after suction filtration was dispersed in 10 mL of dichloromethane containing 0.25 g of paraffin 58, and stirred at 40° C. for 2 h to obtain a homogeneous solution. Put the mixture in a drying ov...

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Abstract

The invention discloses a preparation method for a carbon-containing material metal organic framework-based composite phase change material and belongs to the field of nano composite materials and composite phase change materials. The preparation method comprises the following steps: carrying out in-situ growth of MOFs particles on a polyvinylpyrrolidone (PVP)-modified carbon material surface by adopting a hydrothermal method to prepare a carbon-containing material metal organic framework-based porous carrier material; then, dispersing a carbon material @MOFs porous carrier material into a prepared solution containing a phase change core material by adopting a solution dipping method; adsorbing a phase change core material by utilizing an oversized specific surface area of the metal organic framework material and a nao duct structure; and drying at a temperature higher than the phase change material to obtain the carbon-containing material metal organic framework-based composite phase change material. The material can be used for improving the heat transfer performances of the composite phase-change material, effectively preventing core material leakage, and has the advantages of wide core material selection range. The composite phase change material prepared by the method provided by the invention is excellent in heat transfer performance, good in circulating stability, simple in process and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of composite phase-change materials, and in particular relates to a preparation method of a carbon-containing metal-organic framework-based composite phase-change material. Background technique [0002] With the rapid development of global industry, problems such as the depletion of mineral energy and environmental pollution have become increasingly prominent, and human demand for energy has increased. Humans have begun to realize the importance and inevitability of finding new energy sources. Renewable energy sources such as solar energy, wind energy, biomass energy, and ocean energy have been developed by human beings. However, these energy sources have shortcomings such as dispersion, intermittency, and volatility, resulting in low effective utilization rates. Energy storage technology can store discontinuous and highly random energy in an appropriate medium and release it when needed to achieve efficient use of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 王戈王静静高鸿毅汤甲齐悦范爽杨明
Owner UNIV OF SCI & TECH BEIJING
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