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A kind of preparation method of graphene-based heat and moisture exchange composite membrane

A heat and moisture exchange, graphene-based technology, applied in sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve problems such as poor antibacterial, reduce air conditioning energy consumption, gas permeability and permeability selection Strong performance and good heat transfer effect

Active Publication Date: 2021-12-03
SHANGHAI DONGCHANG AUTOMOBILE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Different from using paper material as the traditional heat and moisture exchange membrane in the prior art, the present invention provides a preparation method of graphene-based heat and moisture exchange composite membrane. Heat and moisture permeability efficiency, while solving the problem of poor antibacterial properties of paper membranes, and improving the overall mechanical properties of the membrane, aging resistance, flame retardancy and other comprehensive properties

Method used

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  • A kind of preparation method of graphene-based heat and moisture exchange composite membrane

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Experimental program
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Effect test

Embodiment 1

[0023] The method using a reflux condenser was added ethanol, natural flake graphite uniform dispersion of high-speed, reflux condensing at 70 ℃ 8 hours; wherein the natural flake graphite in the total solids content of the slurry was 7%, the surfactant employed is twelve alkyl sulphates. The slurry has formulated using ultrasound, supercritical carbon dioxide fluid treatment method, and then the supernatant after centrifugation process to obtain a particle size of 75nm graphene quantum dots. The pore size of 100μm polyvinylidene fluoride graphene quantum dot vinyl alcohol slurry infiltration to the microporous film obtained. Then using the template synthesis method, the metal organic framework ZIF-8 precursor synthesis solution, i.e. 0.01mol / L zinc nitrate and 0.03mol / L 2- methyl imidazole in methanol is introduced in the slurry, after 24 hours, the graphene a quantum dot / metal organic framework in-situ deposition of the composite microporous membrane of polyvinylidene fluo...

Embodiment 2

[0025] The method using a reflux condenser was added ethanol, natural flake graphite uniform dispersion of high-speed, reflux condensing at 70 ℃ 8 hours; wherein the natural flake graphite in the solids content of the slurry was 3% of the total surfactant employed is polyethylene pyrrolidone. The slurry has formulated using ultrasound, supercritical carbon dioxide fluid treatment method, and then the supernatant after centrifugation process to obtain a particle size of 50nm graphene quantum dots. The pore size of 50μm polyvinylidene fluoride graphene quantum dot vinyl alcohol slurry infiltration to the microporous film obtained. Then using the template synthesis method, the metal organic framework ZIF-8 precursor synthesis solution, i.e. 0.02mol / L zinc nitrate and 0.03mol / L 2- methyl imidazole in methanol is introduced in the slurry, after 24 hours, the graphene a quantum dot / metal organic framework in-situ deposition of the composite microporous membrane of polyvinylidene f...

Embodiment 3

[0027] The method using a reflux condenser was added ethanol expandable graphite dispersed uniformly in a high speed, the condensate was refluxed at 70 ℃ 8 hours; wherein the expandable graphite in the solids content of the slurry was 2% of the total surfactant employed is polyethylene glycol ethers of iso-octylphenyl. The slurry has formulated using ultrasound, supercritical carbon dioxide fluid treatment method, and then the supernatant after centrifugation process to obtain a particle size of 10nm graphene quantum dots. The pore size of 100μm polyvinylidene fluoride graphene quantum dot vinyl alcohol slurry infiltration to the microporous film obtained. Then using the template synthesis method, the metal organic framework ZIF-90 precursor synthesis solution, i.e. 0.04mol / L zinc nitrate and 0.10mol / L imidazole-2-carboxaldehyde tert-butanol solution introduced into the slurry, after 24 hours, graphene quantum dot / metal organic framework in-situ deposition of the composite m...

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Abstract

The invention discloses a preparation method of a graphene-based heat-moisture exchange composite membrane. The material is prepared by compounding graphene and a metal-organic framework material and in-situ depositing on a polyvinylidene fluoride microporous membrane. First, the surface modification treatment of natural flake graphite or expanded graphite is carried out by the condensation reflux method, and then the graphene quantum dots are prepared by the supercritical fluid method. Prepare a slurry containing metal-organic framework molecules, embed and adsorb graphene quantum dots for controllable growth, and in-situ deposit on polyvinylidene fluoride microporous membranes and then microwave-dry to prepare a core that can be applied to heat and moisture exchange Graphene-based composite films of materials. The composite membrane prepared by this method has excellent heat transfer, moisture transfer, air permeability, good mechanical properties and chemical stability. Heat exchangers are actively developed as an energy-saving and environmentally friendly equipment that can effectively improve indoor air quality and reduce air-conditioning energy consumption.

Description

Technical field [0001] The present invention relates to a process for preparing HME group graphene composite membrane prepared belonging nanocomposite and application technology. Background technique [0002] With the acceleration of urbanization and the rapid development of my country's national economy, the construction area is increasing rapidly, with the improvement of people's living standards, with supporting air-conditioning energy consumption is also increasing rapidly. In 2009, the building energy consumption accounts for about 30% of total energy consumption society. It is estimated that by 2020 this proportion will rise to 35%. It is estimated that each grid peak load to one-third belong to the air conditioning cooling load. Therefore, reducing air conditioning energy consumption plays a key role to ease the energy shortage. [0003] Full-film heat exchanger indoor air can not only recover sensible heat and latent heat, serve to reduce the load of air-conditioning syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/42C08J9/36C08L27/16C08L81/06C08L27/18
CPCC08J9/36C08J9/42C08J2327/16C08J2327/18C08J2381/06C08J2487/00Y02P20/10Y02P20/54
Inventor 张燕萍段亚强赵志国
Owner SHANGHAI DONGCHANG AUTOMOBILE PARTS
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