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Preparation and application of ATO heat insulation film based on natural cellulose nanofibers

A natural cellulose and nanofiber technology, applied in the field of high-performance ATO thermal insulation film, can solve the problems of organic solvent pollution, non-degradability, non-recyclability, etc., achieve high thermal stability, high degradability and recyclability, eliminate solvent The effect of pollution

Inactive Publication Date: 2020-04-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, it will also be polluted by organic solvents during the production process.
More critically, these polymer substrates are non-degradable and non-recyclable, and they cause severe environmental pollution, which has drawn increasing concerns about environmental pollution.
Therefore, it is still a challenge to produce transparent thermal insulation films with high thermal insulation performance and high environmental degradability through clean production processes.

Method used

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  • Preparation and application of ATO heat insulation film based on natural cellulose nanofibers
  • Preparation and application of ATO heat insulation film based on natural cellulose nanofibers
  • Preparation and application of ATO heat insulation film based on natural cellulose nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Preparation of ATO / CNF Composite Thermal Insulation Film

[0062] (1) Take 4g of dry wood pulp board and pulverize, respectively prepare 0.1mol / L sodium carbonate aqueous solution and 0.1mol / L sodium bicarbonate aqueous solution and prepare buffer solution at a volume ratio of 3:2, take 300mL and pour it into the coniferous wood In a beaker on a particle board, disperse well with a hand mixer. Weigh 0.064g TEMPO and 0.4gNaBr respectively, dissolve them and pour them into the coniferous wood slurry, and stir them magnetically. Measure 40mL NaClO with a graduated cylinder and pour it into the slurry to start the reaction. Use 2mol / L sodium hydroxide to adjust the pH to 10.0-11.0. After the color of the solution disappeared and the pH no longer changed, the stirring was continued for another 12 hours. After the reaction is complete, fully filter and wash with deionized water. Then acidify with 1mol / L HCl solution, adjust the pH of the solution to 1 under constant stirri...

Embodiment 2

[0066] Consistent with the step of Example 1, the difference is only to change the mixing ratio of the nanoparticle aqueous dispersion and the CNF suspension in the step (2), so that the quality of ATO in the mixed dispersion accounts for 10% of the sum of the ATO and CNF quality, the The obtained composite thermal insulation film is named as 10% ATO / CNF composite thermal insulation film.

Embodiment 3

[0068] Consistent with the step of Example 1, the difference is only to change the mixing ratio of the nanoparticle aqueous dispersion and the CNF suspension in the step (2), so that the quality of ATO in the mixed dispersion accounts for 20% of the sum of the ATO and CNF masses. The obtained composite thermal insulation film is named as 20% ATO / NFC composite thermal insulation film.

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Abstract

The invention belongs to the field of transparent heat insulation films, and discloses preparation and application of a degradable, transparent and high-mechanical-strength high-performance ATO heat insulation film based on natural cellulose nanofibers. Fiber raw materials are selected to prepare CNF with a small diameter (20 nm) and a large length-diameter ratio (50) and ATO with a particle sizeof 30-50 nm for blending and suction filtration; a filter cake is attached to the smooth surface of PDMS and dried to form a film, a high-transparency flexible base film is obtained, and due to the good ultraviolet band absorption and infrared band reflection performance of ATO, the composite film has an excellent heat insulation effect. And meanwhile, the nano sizes of ATO and NFC are beneficialto ensuring the high transparency of the composite film. Meanwhile, due to the hydrophilicity of the CNF, the composite film is subjected to a certain mechanical action in a common aqueous solution and is easily dispersed in water again to achieve a recyclable and degradable effect, so that a degradable, transparent and high-performance ATO heat insulation film new material with high mechanical strength is obtained.

Description

technical field [0001] The invention belongs to the field of transparent thermal insulation film (transparent thermal insulation film), in particular to the preparation and application of a degradable, transparent and high-performance ATO thermal insulation film based on natural cellulose nanofibers. Background technique [0002] Solar radiation has a major impact on people's lives. Solar radiation provides the heat, light and energy needed by all. The solar radiation light passing through the atmosphere can be divided into three categories: ultraviolet (UV), visible light (VIS) and infrared (IR). In the total light, VIS accounts for about 42.3%, and UV accounts for about 8%, but the energy of UV light is the strongest. The intense energy of UV light can break the bonds of molecules and damage the DNA structure. Prolonged overexposure to UV rays can cause major damage to the skin and even lead to skin cancer. On the other hand, IR light can account for 49.4% of the total...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/04C08K3/22C08J5/18C08B15/02
CPCC08B15/02C08J5/18C08J2301/04C08K3/22C08K2201/003C08K2201/011
Inventor 陶劲松房东君余煌
Owner SOUTH CHINA UNIV OF TECH
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