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A biodegradable high-barrier composite film and its preparation method

A biodegradable and biodegradable material technology is applied in the preparation of the membrane and in the field of biodegradable high-barrier composite membranes, which can solve the problems of poor biodegradability, low mechanical properties and high cost, achieve easy dispersion and improve glass transition Temperature, the effect of improving barrier properties

Active Publication Date: 2022-07-01
浙江汇盎新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently widely used high-barrier materials include: traditional materials such as aluminum foil, metallized film and glass, etc., but these traditional materials are relatively expensive and difficult to form and process; polymer materials such as ethylene vinyl alcohol copolymer (EVOH), polybias Vinyl chloride (PVDC), polyamide (PA), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyvinyl alcohol (PVA), polyethylene terephthalate- Adipate-butylene glycol ester (PBAT), etc. Although these materials have certain barrier properties, they have disadvantages such as insufficient barrier properties, poor biodegradability, and low mechanical properties.
[0004] A polyvinyl alcohol / xylan biodegradable composite film is reported. The composite film is cast into a film by aqueous solution. The production method is difficult and it is difficult to realize industrial production.
CN103640290A reports a high-barrier fully biodegradable composite film, which consists of a three-layer structure, with polypropylene carbonate (PPC) as the main body and middle layer, and PBAT and polylactic acid (PLA) as the outer and inner layers, In order to increase the toughness, strength and hardness of the film, in order to make the three layers compatible, a certain amount of PBAT-co-PPC copolymer and PLA-co-PPC copolymer were added to the outer layer and the inner layer respectively, which made the preparation of the above Increased difficulty and higher cost
CN104369508A reports a degradable PP-EVOH high-barrier composite film, each layer of material in the composite film obtains a consistent biodegradation performance by introducing bio-based materials, however, its structure is too complicated to cause quality control difficulties
CN106519268A has reported a kind of high barrier water resistance polyvinyl alcohol / nanocrystalline cellulose / graphene oxide PVA / CNC / GO composite film, introduces graphene oxide again in barrier material polyvinyl alcohol to increase water molecule in PVA matrix The transmission path of PVA improves the water barrier performance of PVA, and nanocrystalline cellulose is also introduced to improve the dispersion of nanoparticles and improve the water resistance and water barrier performance of the polymer. Although the barrier performance is good, the mechanical properties are not good.
CN106881929A discloses a polybutylene adipate terephthalate / starch high-barrier composite film and a preparation method thereof. The film adopts a sandwich structure, and the polybutylene adipate terephthalate composite material is the outer layer. The sandwich layer is a starch nanocomposite layer, and the cost of polybutylene adipate terephthalate is relatively high, and the introduction of starch has compatibility problems

Method used

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  • A biodegradable high-barrier composite film and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0049] Synthesis Example 1: Preparation of furandicarboxylic acid-succinic acid-isosorbide copolyester 1

[0050] Add 1 mol of 2,5-furandicarboxylic acid, 1 mol of 1,4-succinic acid and 2 mol of isosorbide into the reactor, exchange with nitrogen to remove air, then add 3 mmol of antimony trioxide as a catalyst, and heat to 200 under stirring. ℃ reacted for 1 hour, then heated to 220 ℃ and continued to react for 2 hours; then, the system pressure was reduced to below 50Pa by a vacuum pump, and further heated to 245 ℃ and reacted for another 1 hour. Furandicarboxylic acid-succinic acid-isosorbide copolyester 1 was obtained; IR spectrum showed it included 1725 cm -1 The polyester carbonyl absorption peak, 1022cm -1 The C-O absorption peak of the secondary hydroxyl group in isosorbide at ; 1 The conversion rate of isosorbide calculated from the characteristic peaks of different units in H NMR was 98.6%, and the number-average molecular weight measured by GPC gel chromatography ...

Synthetic example 2

[0051] Synthesis Example 2: Preparation of furandicarboxylic acid-succinic acid-isosorbide copolyester 2

[0052] Add 1.5 mol of 2,5-furandicarboxylic acid, 0.5 mol of 1,4-succinic acid and 2 mol of isosorbide to the reactor, exchange with nitrogen to remove air, then add 3 mmol of catalyst ethylene glycol antimony, and heat under stirring The reaction was carried out at 200°C for 1 hour, then the temperature was raised to 220°C and the reaction was continued for 2 hours; then, the system pressure was reduced to below 50Pa by a vacuum pump, and the temperature was further raised to 245°C for another 1 hour of reaction. furandicarboxylic acid-succinic acid-isosorbide copolyester 2 is obtained; 1 The conversion rate of isosorbide calculated by the characteristic peaks of different units in H NMR was 99.4%, and the number-average molecular weight measured by GPC gel chromatography was 11.2×10 4 Da, the molecular weight distribution was 2.2. According to ISO 14855, the copolyes...

Embodiment 1

[0054] 65 parts of furandicarboxylic acid-succinic acid-isosorbide copolyester of Synthesis Example 1, 25 parts of polypropylene carbonate (the number average molecular weight is 7.5×10 4 Da, molecular weight distribution is 2.0), 5 parts of triacetin, 10 parts of montmorillonite, 1 part of silane coupling agent KH560, 1 part of oleic acid amide were added to a high-speed mixer and mixed well, and then placed in an oven at 80 °C Dry for 5 hours, and then put it into a twin-screw extruder with an aspect ratio of 50:1 for extrusion granulation, the barrel temperature is 160 °C, and the die temperature is 170 °C; Extrusion blow molding is performed in a 35:1 single-screw extruder. There are six heating zones in the single-screw extruder from the inlet to the outlet: the first zone is 125°C; the second zone is 130°C; the third zone is 140°C; Four zones 150°C; five zones 160°C; six zones 165°C; head temperature 160°C, screw speed 250rpm, traction speed 10m / min, and inflation ratio...

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Abstract

The invention relates to a biodegradable high-barrier composite film. The film is composed of furandicarboxylic acid-succinic acid-isosorbide copolyester (PFSI) and polypropylene carbonate (PPC) doped layered filler, which is fully biodegradable and has good barrier and mechanical properties. Performance, can be used in packaging, medical, food, aerospace and other fields.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular, the invention relates to a biodegradable high-barrier composite film, and the invention also relates to a preparation method of the film. Background technique [0002] In packaging, medical, food, aerospace and many other fields, the barrier properties of materials are very important, and insufficient barrier properties will affect the suitability of materials for specific applications. High barrier polymer materials have the characteristics of oxygen barrier, vapor barrier and oil barrier, which can effectively prevent the intrusion of substances outside the package (such as water vapor, bacteria, etc.) and prevent the escape of substances in the package (such as fragrance, etc.). Ensure the stability of the internal environment of the package and protect the contents. [0003] Currently widely used high-barrier materials include: traditional materials such as aluminum foil, meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/00C08L69/00C08L67/04C08L67/02C08K13/02C08K3/04C08K3/34C08J5/18C08G63/86C08G63/668
CPCC08J5/18C08G63/866C08G63/668C08J2367/00C08J2469/00C08J2467/04C08J2467/02C08K13/02C08K3/04C08K3/042C08K3/34C08K3/346
Inventor 杨昊蓝小平
Owner 浙江汇盎新材料科技有限公司
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