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Waterproof and oxygen-insulating sealing film as well as preparation method and application thereof

A sealing film, waterproof barrier technology, applied in transportation and packaging, other chemical processes, chemical instruments and methods, etc., can solve the problems of difficult to obtain Graphene materials, high fluctuations, multiple wrinkles, etc., and achieve scientific and reasonable preparation methods and procedures. The effect of simple, excellent barrier properties

Inactive Publication Date: 2014-12-17
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphene is a new material with a single-layer sheet structure composed of carbon atoms. Since Graphene was successfully prepared in 2004, the research on Graphene has set off a huge upsurge in the world. Because of the particularity of the structure, it makes Graphene has a certain impermeability to air, water vapor and other small molecules, so it has great development prospects in the field of barrier material applications. Many defects such as multiple wrinkles and high fluctuations cannot meet market demand, so it is necessary to seek its derivatives to meet high barrier requirements

Method used

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  • Waterproof and oxygen-insulating sealing film as well as preparation method and application thereof
  • Waterproof and oxygen-insulating sealing film as well as preparation method and application thereof
  • Waterproof and oxygen-insulating sealing film as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0025] This example illustrates the composite material film composition, composite material film and preparation method thereof provided by the present invention.

[0026] Slowly pour 12 g of pre-dried EVA particles into a solution containing 120 ml of toluene (m EVA :V 甲苯 =1:10) and a round-bottomed flask with a magnetic rotor, after stabilization, the system was heated to 70 °C for 24 h to obtain a mixed paste liquid. Place the glass sheet on the film coating machine, and then apply the obtained pasty liquid on the glass sheet to control the thickness of the coating film to 0.07±0.01 mm. After the coating was completed, the glass sheet was left to air at room temperature for 24 h to fully evaporate the solvent to obtain a pure EVA material film.

Embodiment 2

[0028] (1) Preparation of graphene oxide nanoribbons: weigh 180ml concentrated H 2 SO 4Slowly added to the round bottom flask, then 20ml 85.5 wt% H 3 PO 4 Add dropwise into concentrated sulfuric acid and stir evenly; after stabilization, add 1 g multi-walled carbon nanotubes and stir for 1 h, when the multi-walled carbon nanotubes are uniformly dispersed, mix 6 g KMnO 4 Slowly added to the above mixed solution for 0.5 h, then stirred at a constant speed for 0.5 h; then moved the above reaction system to an oil bath at 45°C, stirred and reacted for 1 d, and then slowly added the mixed system to a solution containing 500 ml deionized water in a large beaker, mix and stir for 1 h, when the temperature drops to room temperature, add 10 ml 30 wt% H 2 o 2 React for 2 h; then ultrasonically disperse the mixture in a 100 W ultrasonic cleaner for 0.5 h, add 100 ml of 38 wt% HCl and deionized water, filter and wash 4 times on a polytetrafluoroethylene filter membrane, and finally ...

Embodiment 3

[0034] Other condition parameters are the same as in Example 2, except that 0.024 g of functionalized graphene oxide nanobelts and 12 g of ethylene-vinyl acetate copolymer particles are added in step (3), and the prepared functionalized graphene oxide nanobelts / The ethylene-vinyl acetate copolymer composite film contains 0.2 wt% K-GONRs.

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Abstract

The invention discloses a waterproof and oxygen-insulating sealing film, a preparation method of the waterproof and oxygen-insulating sealing film, and an application of the waterproof and oxygen-insulating sealing film. The preparation method comprises the following steps: firstly, preparing graphene oxide nanoribbons (GONRs) by adopting a longitudinal multi-walled carbon nanotube oxidization cutting method, performing modification to obtain functional GONRs (K-GONRs), and then compounding the K-GONRs and an ethylene-vinyl acetate copolymer (EVA) on a film coating machine to form a film. According to a composite material thin film prepared by using the method disclosed by the invention, the K-GONRs have excellent compatibility with an EVA matrix, and meanwhile, the K-GONRs achieve good dispersion in the matrix. In addition, most of obtained laminar K-GONRs are distributed in an EVA composite thin film in parallel. By virtue of the multi-layer and parallel-distributed special structure and the close combination between a K-GONRs inserted layer and the EVA matrix, the thin film has excellent blocking performance and good acid and alkali resistance, and further improves the mechanical performance; meanwhile, the thin film is safe and environment-friendly, is particularly suitable for preparing valuable precision instrument sealing films, ice bags for packaging ice and frozen products, and food packaging films, and has wide practical application values.

Description

technical field [0001] The invention belongs to the technical field of polymer composite film preparation, and in particular relates to a waterproof and oxygen-insulating sealing film and its preparation and application. Background technique [0002] Ethylene-vinyl acetate copolymer (EVA) is a thermoplastic resin copolymerized from non-polar ethylene monomer and highly polar vinyl acetate monomer. It is a highly branched random copolymer. Compared with polyethylene, due to the introduction of vinyl acetate (VA) monomer into the molecular chain of EVA, the crystallinity is reduced, so that the product has excellent softness, good low temperature flexibility and surface gloss in a wide temperature range properties, chemical stability, aging resistance and non-toxicity, widely used in the field of high-performance / functional materials. Among them, the film-grade EVA material with VA content less than 20%, due to its non-toxic, light weight, beautiful packaging, low cost and ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K9/06C08K7/00C08K3/04C08J5/18C09K3/10C01B31/04B82Y30/00B82Y40/00B65D65/38C09D7/62
CPCB65D65/38C08J5/18C08K3/04C08K9/06C08J2323/08C08K2201/011B82Y30/00B82Y40/00C01B32/168C01B32/23C09D7/62C09D7/70C08K3/042C09D5/084C09D123/0853Y10S977/746Y10S977/752Y10S977/847C01B2202/06
Inventor 郑玉婴曹宁宁林锦贤
Owner FUZHOU UNIV
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