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Poly(4-hydroxybutyrate) biodegradable packaging film and preparation method thereof

A technology of hydroxybutyrate and packaging film, which is applied in the field of preparation of biodegradable poly packaging film, can solve the problems of complex biological fermentation process, difficult product purification, poor stability, etc., and achieve cost reduction of degradation cycle, strength and Similar toughness and large blow-up ratio

Active Publication Date: 2022-02-22
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tepha Company of the United States took the lead in realizing the large-scale production of P4HB through biological fermentation method, but the biological fermentation method has the disadvantages of complicated process, high cost, difficult purification of the obtained product, and poor stability.

Method used

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  • Poly(4-hydroxybutyrate) biodegradable packaging film and preparation method thereof
  • Poly(4-hydroxybutyrate) biodegradable packaging film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A biodegradable P4HB packaging film is made of the following raw materials in parts by weight:

[0035] P4HB (molecular weight 80,000, molecular weight 100,000) 70 parts, talc powder 20 parts, TMC200 1 part, erucamide 2 parts, antioxidant 1076 1 part, ADR-4468 2 parts, PEG-4000 3 parts, titanate 1 part of coupling agent.

[0036] The preparation method of above-mentioned biodegradable P4HB packaging film, comprises the following steps:

[0037]Step 1. Weigh a small amount of low molecular weight P4HB, talc powder, PEG-4000, titanate coupling agent, antioxidant 1076, and erucamide according to the formula and put them into a high-speed mixer, stir and blend evenly to obtain a blend The filled masterbatches were prepared by a twin-screw extruder. The processing temperature of the twin-screw extruder is 80°C, 100°C, 100°C, 120°C, 120°C, 120°C, 100°C, the screw speed is 150rpm, the screw combination is high shear, and the cooling water temperature is 7°C.

[0038] Step 2...

Embodiment 2

[0041] A biodegradable P4HB packaging film is made of the following raw materials in parts by weight:

[0042] P4HB (molecular weight 120,000, molecular weight 80,000) 75 parts, chitosan 15 parts, talcum powder 3 parts, EBS 2 parts, antioxidant 1076 1 part, ADR-4468 2 parts, silane coupling agent KH550 2 parts.

[0043] The preparation method of above-mentioned biodegradable P4HB packaging film, comprises the following steps:

[0044] Step 1. Weigh a small amount of low-molecular-weight P4HB, chitosan, KH550, EBS, and antioxidant 1076 according to the formula, put them into a high-speed mixer, stir and blend evenly, and prepare the filled masterbatch from the obtained blend through a twin-screw extruder . The processing temperature of the twin-screw extruder is the same as in the first embodiment, the screw speed is 200 rpm, the screw combination is high shear, and the cooling water temperature is 7°C.

[0045] Step 2. Weigh P4HB according to the formula, fill masterbatch pr...

Embodiment 3

[0048] A biodegradable P4HB packaging film is made of the following raw materials in parts by weight:

[0049] 80 parts of P4HB (molecular weight 150,000, molecular weight 80,000), 10 parts of cellulose, 4 parts of cellulose-g-PCL, 2 parts of ethylene bisstearamide, 1 part of antioxidant 1076, 2 parts of ADR-4468, horse 1 part of anhydride.

[0050] The preparation method of above-mentioned biodegradable P4HB packaging film, comprises the following steps:

[0051] Step 1. Weigh a small amount of P4HB, cellulose, cellulose-g-PCL, ethylene bisstearamide, and antioxidant 1076 according to the formula and put them into a high-speed mixer, stir and blend evenly, and the obtained blend is passed through a twin-screw The extruder prepares the filler masterbatch. The processing temperature of the twin-screw extruder is the same as in Example 1, the screw speed is 150 rpm, the screw combination is high shear, and the cooling water temperature is 7°C.

[0052] Step 2. Weigh P4HB acco...

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Abstract

The invention belongs to the technical field of biodegradable polymer materials, and provides a preparation method of a novel high-performance, bio-based degradable packaging film. The technical problems of poor film-forming property, poor film performance and high cost existing in the preparation of packaging films from existing biodegradable materials are solved. The degradable packaging film comprises the following components: 70-90 parts of poly(4-hydroxybutyrate) (P4HB), 10-20 parts of filler, 3-5 parts of compatibilizer, and 0.3-2 parts of nucleating agent , 0.5-3 parts of chain extender, 2-5 parts of lubricant, 0.5-2 parts of antioxidant. At the same time, the P4HB blown film is prepared by adopting appropriate technology and shearing conditions. The P4HB packaging film has the advantages of easy degradation, easy processing, tear resistance, high strength, good toughness, and moderate cost. It can really replace polyolefin materials for Plastic bags, express packaging, etc.

Description

technical field [0001] The invention relates to a preparation method of a biodegradable poly(4-hydroxybutyrate) packaging film, belonging to the technical field of biodegradable polymer materials. Background technique [0002] In recent years, the treatment of pollution caused by non-degradable plastics and the problem of petrochemical resources have become the focus of attention all over the world. Solving the pollution caused by plastics is a major scientific and technological issue facing countries all over the world. my country attaches great importance to the treatment of plastic pollution, and has listed the formulation of a comprehensive treatment plan for "white pollution" as a key reform task, and reviewed and approved the "Opinions on Further Strengthening Plastic Pollution Control" in early 2020 (Fagai Huanzi [2020] No. 80) . The "Opinions" make it clear that by 2020, the production, sale and use of some plastic products will be banned and restricted in some regio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L1/02C08L97/00C08L5/08C08L3/02C08L5/16C08L5/04C08K13/02C08K3/34C08K5/20C08K5/25C08J5/18
CPCC08J5/18C08J2300/16C08J2367/04C08J2401/02C08J2497/00C08J2405/08C08J2403/02C08J2405/16C08J2405/04C08K13/02C08K3/34C08K5/20C08K5/25
Inventor 李志波阚泽沈勇
Owner QINGDAO UNIV OF SCI & TECH
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