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Degradable poly (butylene adipate-co-terephthalate) composite high-oxygen-barrier film as well as preparation method and application thereof

A technology of butylene terephthalate and polyadipic acid, which is applied in the direction of sustainable manufacturing/processing, sustainable packaging industry, climate sustainability, etc., can solve the problem of poor dispersion and low barrier property of the blend system , environmental pollution and other issues, achieve the effect of smooth and uniform membrane surface, no structural defects, and reduce white pollution

Active Publication Date: 2022-05-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems of serious environmental pollution, poor dispersion and low barrier properties of the blend system existing in the existing barrier films, the primary purpose of the present invention is to provide a degradable polyhexamethylene diacrylate that can be completely degraded and has high oxygen barrier properties. Acid / butylene terephthalate composite high oxygen barrier film and preparation method thereof

Method used

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  • Degradable poly (butylene adipate-co-terephthalate) composite high-oxygen-barrier film as well as preparation method and application thereof
  • Degradable poly (butylene adipate-co-terephthalate) composite high-oxygen-barrier film as well as preparation method and application thereof
  • Degradable poly (butylene adipate-co-terephthalate) composite high-oxygen-barrier film as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0039] 40 mg of graphene oxide (GO) was added to 40 mL of deionized water, and sonicated for 1 h until GO was completely dispersed; EDC and NHS (40 mg each) were added to activate the edge carboxyl groups, and the reaction was stirred at room temperature (300 rpm) for 30 min; 3.2 mmol was added. Tris(hydroxymethylaminomethane) modifier, adjust the pH to 4.5 with buffer; continue to stir at room temperature (rotation speed is 300rpm) and react for 18h; wash the reacted product with DMF and deionized water respectively, and centrifuge (rotation speed: 10000rpm) After 20 min, it was dried in a drying oven (50 °C) for 8 h to obtain the edge-modified graphene oxide (f-GO1). image 3 As can be seen in the IR spectrum shown, Tris-GO modified graphene oxide (Tris-GO) at 1570 cm compared to pristine GO. -1 The N-H in-plane vibration peak in the amide bond appears at 1427cm -1 The C-N bond stretching vibration peak appeared at the position, indicating that the polar molecular chain con...

Embodiment 2

[0042] With reference to the modification method of graphene oxide in Example 1, use amino-polyethylene glycol-hydroxyl to replace trimethylolaminomethane, and the amount of carboxyl activator EDC and NHS is increased to 60mg, amino-polyethylene glycol The amount of alcohol-hydroxyl groups was changed from 3.2 mmol to 2.8 mmol, and the other parameters and reaction conditions remained unchanged, and amino-polyethylene glycol-hydroxyl edge-modified graphene oxide (f-GO2) and modified graphene (f-GO2) were prepared. f-rGO2).

Embodiment 3

[0044] Referring to the modification method of graphene oxide in Example 1, replace tris(hydroxymethyl)aminomethane with polylactic acid-polyethylene glycol-amino group of the same mole number, and change the pH from 4.5 to 6, and change the reaction time from 18h to After 20 h, other parameters and reaction conditions were kept unchanged, and polylactic acid-polyethylene glycol-amino edge-modified graphene oxide (f-GO3) and edge-modified graphene (f-rGO3) were prepared.

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Abstract

The invention discloses a degradable poly (butylene adipate-co-terephthalate) composite high-oxygen-barrier film as well as a preparation method and application thereof. The composite film is obtained by removing bubbles from a film-forming solution, pre-curing the film-forming solution in a closed environment and drying the pre-cured film-forming solution, the film forming liquid is obtained by heating an edge modified graphene oxide solution or an edge modified graphene solution and a poly (butylene adipate-co-terephthalate) solution at 60-80 DEG C for 1-4 hours after the edge modified graphene solution and the poly (butylene adipate-co-terephthalate) solution are mixed; the edge modified graphene oxide is prepared by carrying out amidation reaction on a polar molecular chain of which the tail end contains amino and edge carboxyl of graphene oxide, and the edge modified graphene is prepared by reducing the edge modified graphene oxide. The prepared composite film has the advantages of being degradable, excellent in oxygen barrier property, simple in preparation method and the like, and has good application value in the field of packaging.

Description

technical field [0001] The invention relates to an oxygen barrier film, in particular to a degradable polyadipate / butylene terephthalate (PBAT) composite high oxygen barrier film and a preparation method thereof, and belongs to the field of polymer nanocomposite films. Background technique [0002] Polymer barrier materials have the advantages of easy processing, low cost and light weight, and are widely used in food and drug packaging, electronic device packaging and other fields. The widespread application of traditional petroleum-based polymers brings serious environmental pollution problems. In contrast, degradable polymers not only have many advantages of petroleum-based polymers, but also degrade under natural conditions, which can effectively solve the environmental pollution caused by petroleum-based polymers, and are an ideal substitute for traditional polymer barrier materials. Taste. Among them, polybutylene terephthalate-adipate (PBAT) has attracted extensive a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K9/04C08K3/04C08J5/18C08J3/215
CPCC08J5/18C08J3/215C08J2367/02C08K9/04C08K3/042Y02W90/10
Inventor 裴丽霞张冰瑶徐建昌
Owner SOUTH CHINA UNIV OF TECH
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