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High-ultraviolet-shielding high-barrier nanomaterial film and preparation method thereof

A material film, high-barrier technology, applied in the field of high-ultraviolet shielding and high-barrier nanomaterial film and its preparation, can solve the problems of easy penetration and restrict the application of PE film materials, and achieve scientific and reasonable preparation methods and excellent ultraviolet Shielding performance, significant social and economic benefits

Inactive Publication Date: 2017-01-11
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of polyethylene film is that some small molecules such as oxygen and water vapor are easy to penetrate, and ultraviolet rays are easy to penetrate, which greatly limits the application of PE film materials in ultraviolet shielding and blocking.

Method used

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  • High-ultraviolet-shielding high-barrier nanomaterial film and preparation method thereof
  • High-ultraviolet-shielding high-barrier nanomaterial film and preparation method thereof
  • High-ultraviolet-shielding high-barrier nanomaterial film and preparation method thereof

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preparation example Construction

[0023] (1) Preparation of GONRs: First, 180 mL of concentrated H 2 SO 4 Slowly added to the round bottom flask and stirred, then 20 mLH 3 PO 4 Slowly drop in, mix evenly at a certain speed, slowly add 1 g MWCNTs and stir for 30 min until uniform, then add 6 g KMnO 4 Slowly added to the above mixture; the above reaction system was stirred in an oil bath at 50 °C for 24 h, then cooled to room temperature, and then poured into a solution containing 10 mL H 2 o 2 500 mL of deionized water was stirred in an ice bath for 1 h. At this time, the solution turned dark green, indicating that the reaction was complete. Then, an appropriate amount of HCl was added and centrifuged until neutral, and finally dried in a freeze dryer to obtain GONRs;

[0024] (2) Preparation of EGONRs: Dissolve 100 mg GONRs in 100 mL deionized water, and 100 W ultrasonic for 1 h to form a uniform dispersion; add a certain amount of HCl to adjust the pH to 1~2; then add 0.5 g ethanolamine to react at room t...

Embodiment 1

[0030] Take 5 g of LDPE in a round bottom flask, add 30 mL of xylene, heat up to 80 °C and stir until it becomes a paste; dissolve 0.05 g of EGNRs in 10 mL of xylene, slowly pour it into the round bottom flask, and stir evenly; Slowly pour the mixed solution into a large amount of absolute ethanol to stir and flocculate, filter and dry to obtain the EGNRs / LDPE masterbatch, and then add the obtained EGNRs / LDPE masterbatch and LDPE pellets into the twin-screw extruder at a ratio of 1:1. Melt extrusion and granulation at 140°C, and finally a 0.5wt% EGNRs / LDPE composite film was prepared by tablet cutting with a flat vulcanizer.

Embodiment 2

[0032]Take 12.5 g LDPE in a round-bottomed flask, add 60 mL of xylene, heat up to 80 °C and stir until it becomes a paste; dissolve 0.05 g of EGNRs in 10 mL of xylene, slowly pour it into the round-bottomed flask, and stir evenly; Slowly pour the mixed solution into a large amount of absolute ethanol to stir and flocculate, filter and dry to obtain EGNRs / LDPE masterbatch, then add the obtained EGNRs / LDPE masterbatch and LDPE pellets into the twin-screw extruder at a ratio of 1:1 Melt extrusion and granulation at 140°C, and finally a 0.2wt% EGNRs / LDPE composite film was prepared by pressing and cutting with a flat vulcanizer.

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Abstract

The invention belongs to the field of preparation of polymer materials and discloses a high-ultraviolet-shielding high-barrier nanomaterial film and a preparation method thereof; ethanolamine functionalized graphene nanoribbons are dispersed in low-density polyethylene base to produce masterbatch; the masterbatch is mixed with low-density polyethylene granules according to a mass ratio of 1:1 and is extruded, pelletized and sheeted and cut into the nanomaterial film; in the nanomaterial film, the ethanolamine functionalized graphene nanoribbons account for 0.2-1.5% by weight of the low-density polyethylene base; the graphene oxide nanoribbons herein are subjected to ethanolamine modification, the ability of the nanoribbons to dissolve in an organic solvent is improved, and the nanoribbons can be dispersed evenly in LDPE (low-density polyethylene) base; by tightly combining ethanolamine functionalized graphene nanoribbon intercalation with the LDPE base, the composite material is provided with excellent barrier property; by introducing ethanolamine, the ultraviolet shielding property of the composite film is greatly improved; the film is applicable to the field of ultraviolet shielding and barrier packaging film and has a promising application prospect.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to a nano material film with high ultraviolet shielding and high barrier properties and a preparation method thereof. Background technique [0002] Polyethylene (PE) is a thermoplastic resin obtained by polymerization of ethylene. It has a simple structure and is the most widely used polymer material. Polyethylene is non-toxic and odorless, has excellent high stretchability, low temperature resistance, good chemical stability, and can withstand most acid and alkali erosion; it is widely used in industry, agriculture, packaging and daily industry, and is widely used in China . However, the disadvantage of polyethylene film is that some small molecules such as oxygen and water vapor are easy to penetrate, and ultraviolet rays are easy to penetrate, which greatly limits the application of PE film materials in ultraviolet shielding and blocking. Ther...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K9/04C08K7/00C08K3/04
CPCC08K3/04C08K7/00C08K9/04C08L23/06C08J5/18C08J2323/06C08J2423/06C08K2201/011C08L2205/025C08L2205/16C08L2207/066
Inventor 郑玉婴陈宇
Owner FUZHOU UNIVERSITY
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