A kind of polyhydroxyalkanoate/starch high barrier composite film and preparation method thereof

A polyhydroxyalkanoate and high-barrier composite film technology, which is applied in chemical instruments and methods, flat products, and other household appliances, can solve the problem of increasing the processing difficulty and production cost of composite films, affecting film performance and appearance, and reducing degradation Performance and other issues, to achieve low production costs, improve compatibility, and reduce sensitivity

Active Publication Date: 2019-03-12
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor adhesion between the thermoplastic polyester layer and the thermoplastic starch layer, the two layers are easy to separate, thereby affecting the performance and appearance of the film. In order to solve this problem, the patent is between the thermoplastic polyester layer and the thermoplastic starch layer An additional adhesive layer H is added between them, but adding an adhesive layer significantly increases the processing difficulty and production cost of the composite film, and at the same time reduces the degradation performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]A polyhydroxyalkanoate / starch high barrier composite film, its specific components and preparation method are as follows:

[0039] (1) The composition of the starch nanocomposite layer and the preparation method of the pellets: 6.2Kg of hydroxypropyl tapioca starch (degree of substitution 0.1), 1.0Kg of polyvinyl alcohol, 800g of polyhydroxyalkanoate, organically modified montmorillonite 600g of soil, 60g of maleic anhydride, 150g of zinc stearate, 300g of calcium stearate, 45g of monoglyceride, 56g of adipic acid, 2.0Kg of glycerin, 0.6Kg of glyceryl diacetate, and 45g of paraffin into a high-speed mixer, Stir and mix; the mixed material is granulated in a twin-screw extrusion granulator. The parameters of the granulator are set as follows: the heating temperature of the screw barrel is 100°C-170°C, the temperature of the head is 160°C, and the screw speed is 190rpm. The mixture is processed into pellets with a diameter of 1-3mm.

[0040] (2) Composition of polyhydroxy...

Embodiment 2

[0046] A polyhydroxyalkanoate / starch high barrier composite film, its specific components and preparation method are as follows:

[0047] (1) The composition of the starch nanocomposite material layer and the preparation method of the pellets: tapioca starch acetate (degree of substitution 0.3) 7.4Kg, hydroxypropyl cellulose 1.2Kg, polybutylene adipate terephthalate 400g, organically modified montmorillonite (modifier is dioctadecyl dimethyl ammonium chloride) 660g, zinc stearate 100g, calcium stearate 200g, silane coupling agent KH55080g, monoglyceride 60g, 56g of citric acid, 2.4Kg of glycerin, 500g of n-butyl acetyl citrate, and 48g of paraffin are poured into a high-speed mixer, stirred and mixed; the mixed material is granulated in a twin-screw extrusion granulator, and the temperature of the granulator is It is: 110°C-175°C, head temperature 170°C, screw speed 200rpm, process the powder into pellets with a diameter of 1-3mm.

[0048] (2) The composition of polyhydroxyal...

Embodiment 3

[0054] A polyhydroxyalkanoate / starch high barrier composite film, its specific components and preparation method are as follows:

[0055] (1) The composition of the starch nanocomposite layer and the preparation method of the pellets: 8.3Kg of oxidized cross-linked potato starch, 1.2Kg of polyvinyl alcohol, 0.5Kg of sodium alginate, 900g of polyhydroxyalkanoate, organically modified Mongolian 800g of soil removal, 60g of maleic anhydride, 120g of zinc stearate, 240g of calcium stearate, 53g of monoglyceride, 65g of adipic acid, 2.3Kg of glycerin, 340g of epoxy methyl ester, and 40g of paraffin are poured into the high-speed mixer, Stir and mix; granulate the mixed material in a twin-screw extrusion granulator, the temperature of the granulator is 80°C-170°C, the temperature of the head is 165°C, the screw speed is 150rpm, and the powder is processed into a diameter of 1- 3mm pellets.

[0056] (2) The composition of polyhydroxyalkanoate composite materials and the preparation ...

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Abstract

The invention relates to the field of food packaging and in particular provides a polyhydroxyalkanoate / starch high-barrier composite membrane and a preparation method of the polyhydroxyalkanoate / starch high-barrier composite membrane. The membrane adopts a sandwiched structure and takes a polyhydroxyalkanoate layer as an outer layer; a sandwiched layer is a starch nano composite material layer; the thickness of the sandwiched layer accounts for 40 percent to 90 percent of the whole composite membrane; the composite membrane with the structure has good mechanical properties, biodegradability, flexibility, water resistance, heat sealing property and ultra-strong gas barrier performance and can be widely applied to packaging application fields including packaging of fresh agricultural products, packaging high-oil foods, packaging of other products which are easy to oxidize, supermarket shopping bags, garbage bags and the like.

Description

technical field [0001] The invention relates to the field of food packaging, and specifically provides a polyhydroxyalkanoate / starch high-barrier composite film and a preparation method thereof. Background technique [0002] The environmental pollution caused by petroleum-based plastics is becoming more and more serious, and there is an urgent need to replace them with fully degradable plastics. Polyhydroxyalkanoate is a fully degradable material widely studied at home and abroad. However, the film prepared by pure polyhydroxyalkanoate has low strength and poor hardness, which is limited in many application fields. Therefore, in the actual processing process, polyhydroxyalkanoate is usually blended and modified with other synthetic polyesters to improve its application performance. [0003] The high raw material cost of polyhydroxyalkanoate is another important reason that limits its popularization and application. Therefore, the compounding of polyhydroxyalkanoate and na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/06B32B27/22B32B27/18B32B27/36B32B9/00C08L3/08C08L3/06C08L3/10C08L29/04C08L5/04C08L1/28C08K13/06C08K3/34C08K5/098C08K5/053C08K5/092C08L67/04C08L67/02C08K5/103C08K5/20B29C69/02B29C48/21B29L7/00
CPCB29C48/001B29C48/08B29C48/21B29L2007/00B32B9/00B32B27/06B32B27/18B32B27/22B32B27/36B32B2307/7163B32B2307/73B32B2439/70C08K2201/011C08K2201/014C08L3/06C08L3/08C08L3/10C08L67/04C08L2201/06C08L2201/14C08L2203/162C08L2205/02C08L2205/025C08L2205/035C08L29/04C08L5/04C08L1/284C08K13/06C08K3/346C08K5/098C08K5/053C08K5/092C08L67/02C08K5/103C08K5/20
Inventor 侯汉学董海洲王文涛张慧代养勇
Owner SHANDONG AGRICULTURAL UNIVERSITY
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