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Preparation method of nanoporous high-efficiency heat-insulating polyethylene film

A polyethylene film and nano-porous technology, which is applied in the production of bulk chemicals, insulation improvement, climate change adaptation, etc., can solve the problems of difficult and uniform dispersion of nano-airgel powder, and achieve high chemical stability and compatibility The effect of high stability and simple preparation method

Inactive Publication Date: 2019-06-21
罗瑞尔纳米合成材料(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the natural agglomeration phenomenon, it is difficult for nano airgel powder to disperse evenly in the corresponding organic matrix.

Method used

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  • Preparation method of nanoporous high-efficiency heat-insulating polyethylene film
  • Preparation method of nanoporous high-efficiency heat-insulating polyethylene film
  • Preparation method of nanoporous high-efficiency heat-insulating polyethylene film

Examples

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preparation example Construction

[0025] A preparation method of nano-porous high-efficiency heat-insulating polyethylene film, adding nano-airgel powder into a coupling agent solution (coupling agent and solvent volume ratio 1: (50-150)), stirring at room temperature for 0.5h-1h After aging 2d. After aging, put it into a 60°C-80°C drying oven to dry for 2h-4h to obtain the modified airgel powder. Mix the modified nano-airgel powder and polyethylene powder evenly in a certain proportion, add a certain proportion of polyethylene wax and functional additives, and put them into the internal mixer at 120°C-150°C, and banbury for 30min- After 50 minutes, put it into a twin-screw granulator for granulation, and obtain the thermal insulation masterbatch. Finally, the masterbatch or the masterbatch and the base material are mixed and stretched through a casting machine at 120°C-150°C to obtain a nanoporous high-efficiency heat-insulating polyethylene film.

[0026] Preferably, the aerogel is silica aerogel.

[0027...

Embodiment 1

[0031] Example 1: Preparation of nanoporous high-efficiency thermal insulation polyethylene film under solid phase

[0032] The preparation of nanoporous high-efficiency thermal insulation polyethylene film under solid phase is mainly divided into three parts: first, the modification of silica airgel powder. Put a certain amount of silica airgel powder into a container containing a silane coupling agent solution, and stir at room temperature for 30min-60min; The coupling agent solution is prepared by 1mL silane coupling agent corresponding to 50mL-150mL ethanol. Second, mix the modified silica airgel powder, polyethylene powder, polyethylene wax and additives evenly and put them into a mixer at 120°C-150°C, mix for 30min-50min, and put them into twin-screw granulation In-machine granulation to obtain nanoporous high-efficiency heat-insulating polyethylene masterbatch; the mass ratio of airgel powder, polyethylene powder, polyethylene wax and additives is 3:100:5:(0.1-0.3). T...

Embodiment 2

[0033] Example 2: Preparation of nanoporous high-efficiency thermal insulation polyethylene film in liquid phase

[0034] The preparation of nanoporous high-efficiency thermal insulation polyethylene film in liquid phase is mainly divided into three parts: first, the modification of silica airgel powder. Put a certain amount of silica airgel powder into a container containing a silane coupling agent solution, and stir at room temperature for 30min-60min; The coupling agent solution is prepared by 1mL silane coupling agent corresponding to 50mL-150mL ethanol. Second, mix the modified silica airgel powder, polyethylene powder, polyethylene wax and additives evenly into a container filled with ethanol, stir at room temperature for 30min-60min, and send it to 70℃-80℃ Dry in an oven for 4-8 hours; after that, put it into a granulator to granulate to obtain nanoporous high-efficiency heat-insulating polyethylene masterbatch; the mass ratio of airgel powder, polyethylene powder, pol...

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Abstract

The invention relates to a preparation method of a nanoporous high-efficiency heat-insulating polyethylene film, by which the nanoporous high-efficiency heat-insulating polyethylene film is prepared from nanometer aerogel powder as an inorganic filler and polyethylene powder as a main raw material. The preparation process comprises the following main steps: performing surface modification on the nanometer aerogel powder, preparing masterbatch, casting the film and the like. Through certain technical characterization, the fact that the nanometer aerogel powder is uniformly dispersed in a polyethylene matrix is proved. Compared with the conventional polyethylene film, the nanoporous high-efficiency heat-insulating polyethylene film provided by the invention has the advantages as follows: theheat conductivity of the nanoporous high-efficiency heat-insulating polyethylene film doped with 3% of the aerogel powder is decreased by 26.1%, and the tensile strength and the elongation at break are not changed too much. Decrease in the heat conductivity indicates increase in heat-preserving and heat-insulating properties of the film, so that the film prepared by the preparation method provided by the invention has a very good application prospect in the field of heat preservation and heat insulation.

Description

technical field [0001] The invention belongs to the field of thermal insulation and relates to a preparation method of a nanoporous high-efficiency thermal insulation polyethylene film. Background technique [0002] Airgel is usually a nanoporous network structure formed by the aggregation of colloidal particles or polymer molecules, and a highly dispersed lightweight nanoporous solid material filled with a gaseous dispersion medium in its voids. The special structure makes the airgel have low density (3-500mg / cm 3 ), high porosity (80%-99.8%), high specific surface area (~1000m 2 / g) and low thermal conductivity (~0.017W / (m·K)). Due to these properties, airgel has excellent thermal insulation properties. [0003] Polyethylene is a plastic base material, which is suitable for various molding processes of thermoplastic molding processing, and has good molding processability. Polyethylene film has good transparency and heat sealability, and can be waterproof and moisture-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L79/08C08K9/06C08K9/04C08K7/24C08K7/26C08J5/18C08J3/22
CPCC08J5/18C08J3/226C08J2323/06C08J2423/06C08J2479/08C08K9/06C08K9/04C08K7/24C08K7/26Y02P20/52
Inventor 沈军王晓栋陈冬靳宏洲
Owner 罗瑞尔纳米合成材料(江苏)有限公司
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