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Cyclodextrin-based metal organic framework composite material as well as preparation method and application thereof

A metal-organic framework, organic framework technology, applied in electrochemical generators, coatings, electrical components, etc., can solve the problems of dangerous operation, poor electrochemical performance, etc., and achieve low cost, high porosity, and superior mechanical strength. Effect

Active Publication Date: 2022-05-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The present invention aims to solve the technical problems of poor electrochemical performance and dangerous operation in the prior art, and provides a high ion conductivity and energy-saving, easy-to-operate Safe cyclodextrin-based metal-organic framework composite material and its preparation method and application

Method used

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  • Cyclodextrin-based metal organic framework composite material as well as preparation method and application thereof
  • Cyclodextrin-based metal organic framework composite material as well as preparation method and application thereof
  • Cyclodextrin-based metal organic framework composite material as well as preparation method and application thereof

Examples

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Embodiment 1

[0032] Step 1: Preparation of cellulose matrix: use commercially available bacterial cellulose, cut into small pieces about 3*3cm in size, soak in 3wt.% NaOH solution, heat to 80°C, stir for 12h, wash to remove residual impurities, Wash with deionized water several times until PH ≈ 7, use a crusher for mechanical crushing, disperse in deionized water, the mass concentration of bacterial cellulose is 1.7mg / mL, suction filter to form a film, pre-freeze, and freeze in a freeze dryer Let dry for 24 hours.

[0033] Step 2: Preparation of Mg metal-organic framework Mg-β-CD-MOF composite cellulose membrane: Weigh 0.203g of magnesium chloride hexahydrate and dissolve it in 10ml of deionized water, dissolve it fully by ultrasonication for 5min at 25°C, and weigh 1.984g of β-cyclopaste Add the essence to the above solution, dissolve it fully by ultrasonication for 5 minutes at 25°C, filter it into a 50mL beaker with a needle filter with a pore size of 0.45μm, immerse the cellulose membr...

Embodiment 2

[0036] Step 1: Preparation of cellulose matrix: use commercially available bacterial cellulose, cut into small pieces about 3*3cm in size, soak in 20wt.% NaOH solution, heat to 80°C, stir for 12h, wash to remove residual impurities, Wash with deionized water several times until PH ≈ 7, use a crusher for mechanical crushing, disperse in deionized water, the mass concentration of bacterial cellulose is 20mg / mL, suction filter to form a film, pre-freeze, and dry in a freeze dryer 24 hours.

[0037] Step 2: Preparation of K metal-organic framework K-γ-CD-MOF composite cellulose membrane: Weigh 0.345g of potassium carbonate and dissolve it in 10mL of deionized water, dissolve it fully by ultrasonication for 5min at 25°C, and weigh 0.162g of γ-cyclodextrin Add it to the above solution, dissolve it fully by ultrasonication for 5 minutes at 25°C, filter it into a 50mL beaker with a needle filter with a pore size of 0.45μm, immerse the cellulose membrane in it, put it into another 200m...

Embodiment 3

[0040] Step 1: Preparation of cellulose matrix: use commercially available bacterial cellulose, cut into small pieces about 3*3cm in size, soak in 5wt.% NaOH solution, heat to 80°C, stir for 12h, wash to remove residual impurities, Wash with deionized water several times to PH ≈ 7, use a crusher for mechanical crushing, disperse in deionized water, the mass concentration of bacterial cellulose is 7.1mg / mL, transfer 5ml dispersion liquid to the mold, pre-freeze, in Dry in a freeze dryer for 48 hours.

[0041] Step 2: Preparation of Na metal-organic framework Na-γ-CD-MOF composite cellulose membrane: Weigh 0.02g of sodium hydroxide and 1.296g of γ-cyclodextrin and dissolve them in 5mL of deionized water, and dissolve them fully by ultrasonication for 5min at 25°C , mix, filter into a 50mL beaker with a needle filter with a pore size of 0.45μm, immerse the cellulose airgel in it, put it into another 200mL beaker filled with 40mL of absolute ethanol, seal the container, and react ...

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Abstract

The invention relates to a cyclodextrin-based metal organic framework composite material and a preparation method and application thereof, and solves the technical problems of poor electrochemical performance and dangerous operation in the prior art, the cyclodextrin-based metal organic framework composite material is formed by compounding a biomass material cellulose fiber and a cyclodextrin-based metal organic framework, the cyclodextrin-based metal organic framework is compounded on the biomass material cellulose fibers and gaps among the biomass material cellulose fibers, the diameter of the cellulose fibers is 0.2-2 mu m, the size of the cyclodextrin-based metal organic framework is 0.05-2 mu m, and the thickness of the cyclodextrin-based metal organic framework-based composite material is 10-300 mu m. The method can be applied to the field of preparation of battery materials.

Description

technical field [0001] The invention relates to a composite material, in particular to a cyclodextrin-based metal-organic framework composite material and its preparation method and application. Background technique [0002] With the rapid development of social economy and science and technology, the gradual consumption of traditional non-renewable resources and the increasing demand for energy, energy storage devices such as fuel cells, primary batteries, and secondary batteries have emerged as the times require. Secondary batteries have the characteristics of high energy density, long cycle life, and environmental friendliness. They have developed rapidly in recent years and are widely used in many fields such as digital products and electric vehicles. At present, commercial lithium-ion batteries use graphite as the negative electrode, and their theoretical capacity density is only 372mAh g -1 , the theoretical energy density is only 390Wh·kg -1 , which limits the batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08J7/12C08J7/04C08G83/00H01M10/0565
CPCC08J7/12C08J7/0427C08G83/008H01M10/0565C08J2301/02C08J2487/00Y02E60/10
Inventor 于运花曾晓悦朱会蓉蔡朕伟兰金叻杨小平
Owner BEIJING UNIV OF CHEM TECH
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