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A kind of degradable barrier nanocomposite film and its preparation method and application

A nanocomposite and degradable polymer technology, applied in the field of degradable barrier nanocomposite film and its preparation, can solve the problems of limited barrier gas types, poor barrier performance, poor dispersion, etc., and achieve performance without defects, excellent barrier performance, The effect of excellent mechanical properties

Active Publication Date: 2022-05-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the problems of poor barrier performance of the existing single substrate, relatively limited types of barrier gas, and poor compatibility and poor dispersion in the blend system, the primary purpose of the present invention is to provide a degradable barrier nanocomposite film

Method used

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  • A kind of degradable barrier nanocomposite film and its preparation method and application
  • A kind of degradable barrier nanocomposite film and its preparation method and application
  • A kind of degradable barrier nanocomposite film and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0040] 100 mg of graphene oxide (GO) was added to 200 mL of ethanol, stirred at 300 rpm for 20 min, and sonicated for 30 min to obtain a uniform GO dispersion; 4.85 mmol of α-hydroxy-ω-amino polyethylene glycol (OH-PEG-NH 2 ) was added to the GO dispersion, sonicated for 30 min, stirred at room temperature (stirring speed of 300 rpm) for 24 h, filtered through a polytetrafluoroethylene microporous membrane, washed with ethanol for several times, and vacuum-dried at 40 °C to obtain α-hydroxy- ω-Aminopolyethylene glycol modified graphene oxide (MGO1). Infrared spectrum IR (cm -1 ): 3440, 2924, 2855, 1732, 1630, 1454, 1376, 1103.

Embodiment 2

[0042] According to the modification method of graphene oxide in Example 1, with the same mole number of α-amino-ω-carboxyl polyethylene glycol (NH 2 -PEG-COOH) instead of α-hydroxy-ω-amino polyethylene glycol (OH-PEG-NH 2 ) to prepare α-amino-ω-carboxy polyethylene glycol-modified graphene oxide (MGO2). Infrared spectrum IR (cm -1 ): 3445, 2925, 2857, 1733, 1630, 1455, 1377, 1105.

Embodiment 3

[0044] According to the modification method of graphene oxide in Example 1, with the same mole number of α,ω-diaminopolyethylene glycol (NH 2 -PEG-NH 2 ) instead of α-hydroxy-ω-amino polyethylene glycol (OH-PEG-NH 2 ) to prepare α,ω-diaminopolyethylene glycol modified graphene oxide (MGO3). Infrared spectrum IR (cm -1 ): 3448, 2931, 2852, 1734, 1631, 1457, 1378, 1106.

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Abstract

The invention discloses a degradable barrier nanocomposite film, a preparation method and application thereof. The composite film is prepared from degradable polymers polylactic acid PLA, polyvinyl alcohol PVA and graphene oxide grafted with amino compounds, wherein the ratio of PLA and PVA two polymers is 5:1 to 2: 1, the graft-modified graphene oxide accounts for 0.1-1.0 wt% of the composite membrane mass. In the present invention, the graphene oxide is modified by the amino compound, and the reaction ratio of the amino compound and the graphene oxide is 0.02-0.1 mmol / 1 mg. The composite nano material of the invention has good dispersion performance and compatibility, and the nano composite film prepared by solution film formation has excellent mechanical properties and gas barrier properties, and has good application prospects in packaging films.

Description

technical field [0001] The invention belongs to the field of polymer nanocomposite films, in particular to a degradable barrier nanocomposite film and a preparation method and application thereof. Background technique [0002] Polymer films are widely used in food, medicine, cosmetic packaging, agricultural coating and electronic packaging due to their advantages of light weight, low cost, and easy processing. At the same time, the widespread use of traditional polymer packaging films brings serious white pollution problems. From the "plastic restriction" ten years ago to today's "plastic ban", it can be seen that it is urgent to solve the problem of white pollution caused by traditional polymer films. Degradable polymers not only have the advantages of light weight, strong flexibility and easy processing of traditional petroleum-based polymers, but also can be completely degraded in the environment, which can effectively solve the serious pollution problems caused by petro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L29/04C08K9/04C08K3/04C08J5/18
CPCC08J5/18C08J2367/04C08J2429/04C08K9/08C08K3/042
Inventor 裴丽霞杨兰香徐建昌
Owner SOUTH CHINA UNIV OF TECH