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Biodegradable oriented composite film with high gas barrier property

A composite film, gas barrier technology, applied in the direction of polyether coatings, coatings, etc., can solve the problems such as the lack of realization of two-dimensional nanosheet filler orientation and the failure to improve gas barrier properties well, and achieve gas barrier The effect of optimized performance and simple production process

Active Publication Date: 2021-01-22
QUZHOU RES INST OF ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the disclosed technology has not realized the alignment of two-dimensional nanosheet fillers inside or on the surface of the biodegradable polymer film, it has not been able to improve the gas barrier properties of the biodegradable polymer film such as oxygen and water vapor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh 0.1 part of reduced graphene oxide, 0.1 part of molybdenum disulfide, 60 parts of polybutylene adipate terephthalate, 39.8 parts of polylactic acid and 0.5 part of Joncryl ADR4368 in parts by mass and stir Uniform, transported to a screw extrusion granulator by a feeder for granulation, processed by blow molding to obtain a base layer, and the thickness of the obtained base layer is 7.5 μm. The inflation ratio of the blow molding is 3, the draw ratio is 10, and the water vapor transmission rate of the obtained base layer is 3575.1g / (m 2 24h), the oxygen transmission rate is 6536.2cm 3 / (m 2 ·24h·0.1MPa).

[0022] (2) Weigh 15 parts by mass of graphene oxide, 35 parts of montmorillonite, 43.7 parts of polyvinyl alcohol, 5 parts of paraformaldehyde, 1 part of hydrochloric acid, 0.2 part of polydimethylsiloxane Alkanes and 0.1 part of polymethyl acrylate are dispersed in the mixed dispersion medium of water and ethanol with a mass ratio of 3:1 to prepare a coa...

Embodiment 2

[0024] (1) Take 20 parts by mass of graphene oxide, 40 parts of polyglycolic acid, 18 parts of polypropylene carbonate, 20 parts of starch, 0.5 parts of Joncryl ADR4300 and 1.5 parts of Joncryl ADR4380 and stir evenly, The material is conveyed to a screw extrusion granulator by a feeder for granulation, and the base layer can be obtained by tape casting, and the thickness of the obtained base layer is 90 μm. The draw ratio of the tape casting process is 3, and the water vapor transmission rate of the gained base layer is 160.4g / (m 2 24h), the oxygen transmission rate is 375.2cm 3 / (m 2 ·24h·0.1MPa).

[0025](2) Take by weight 30 parts of reduced graphene oxide, 20 parts of polyvinyl alcohol, 37 parts of polyacrylic acid, 8.5 parts of glutaraldehyde, 1 part of tetramethylene, 1 part of hydrochloric acid, 1.5 parts Sulfuric acid and 1 part of polyether-modified organosiloxane are dispersed in water, methanol, and isopropanol in a dispersion medium with a mass ratio of 99:0.5:...

Embodiment 3

[0027] (1) take by weight 5 parts of boron nitride, 4.95 parts of boron phosphide, 40 parts of polycaprolactone, 50 parts of polybutylene succinate and 0.05 part of toluene diisocyanate and stir evenly, The material is transported to a screw extrusion granulator for granulation by a feeder, and the base layer can be obtained by biaxial stretching, and the thickness of the obtained base layer is 27 μm. The transverse draw ratio of the biaxial stretching is 4, and the longitudinal draw ratio is 5. The water vapor transmission rate of the obtained base layer is 5.7g / (m 2 24h), the oxygen transmission rate is 6827.2cm 3 / (m 2 ·24h·0.1MPa).

[0028] (2) Take by weight 65.59 parts of molybdenum disulfide, 32 parts of polymethacrylic acid, 2 parts of glutaraldehyde, 0.4 parts of hydrochloric acid and 0.01 part of polymethacrylate, dispersed in water, acetone and Isopropanol is prepared into a coating liquid in a mixed dispersion medium with a mass ratio of 10:2:1. The viscosity o...

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Abstract

The invention discloses a biodegradable oriented composite film with high gas barrier property. The composite film is composed of a coating layer and a base layer, the thickness of the coating layer is 10-500 nm, and the coating layer contains a first two-dimensional material oriented parallel to the surface of the coating layer; the base layer is a biodegradable film, the thickness of the base layer is 1-300 microns, and the base layer contains a second two-dimensional material which is parallel to the surface of the base layer. The biodegradable oriented composite film with high gas barrierproperty provided by the invention has very high oxygen and water vapor barrier property; wherein the barrier property is obviously superior to that of a film without a coating layer, and the biodegradable oriented composite film can be applied to coating and packaging of agriculture, electronics, electric appliances, buildings, foods, medical treatment and the like.

Description

technical field [0001] The invention relates to the field of composite films, in particular to a biodegradable oriented composite film with high gas barrier properties. Background technique [0002] Composite films play an important role in all aspects of human society, and are often used for coating or packaging in agriculture, electronics, electrical appliances, construction, food, and medical care. However, a large number of film products are discarded after one-time use, because bulk film materials such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) are difficult to degrade in the natural environment , The long-term accumulation has caused serious "white pollution" problems, destroying the ecological environment. [0003] Using biodegradable plastics to replace traditional non-degradable plastics is an important way to solve film pollution. Currently available biodegradable materials mainly include polybutylene adipate terephthalate (PBAT), ...

Claims

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Application Information

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IPC IPC(8): C08J7/048C09D129/04C09D133/00C09D171/02C09D133/26C09D7/61C09D7/62C09D7/63C09D7/65C08L67/02C08L67/04C08L69/00C08L3/02C08L97/00C08L5/14C08L1/02C08K13/02C08K3/04C08K3/30C08K3/38C08K13/06C08K9/04C08K3/34
CPCC08J7/048C09D129/04C09D133/00C09D171/02C09D133/26C09D7/61C09D7/62C09D7/63C09D7/65C08L2201/14C08L2205/03C08L2205/025C08K2003/3009C08K2003/385C08K13/02C08K3/042C08K3/38C08K13/06C08K9/04C08K3/346C08K3/34C08J2367/02C08J2367/04C08J2467/02C08J2467/04C08J2469/00C08J2403/02C08J2497/00C08J2405/14C08J2401/02C08L83/04C08L33/08C08L29/04C08L83/12C08K5/07C08L33/04C08K3/30C08L33/10C08L33/00Y02W90/10
Inventor 王文俊刘平伟李家旭来蕾
Owner QUZHOU RES INST OF ZHEJIANG UNIV