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Preparation method of environment-friendly biodegradable PBAT foaming material

A foaming material and biodegradation technology, which is applied in the field of preparation of environmentally friendly biodegradable PBAT foaming materials, can solve the problems of difficulty in ensuring tensile strength, insufficient self-strength, poor thermal insulation performance, etc., and achieves excellent biodegradability and improved melting point. Body strength and heat distortion temperature, the effect of easy degradation

Pending Publication Date: 2022-03-25
珠海四唯新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the prior art that while improving its degradability, it is often difficult to ensure its good physical properties such as tensile strength, so that although the foam material can be degradable, its own strength and the like are not enough. It is not durable and has poor thermal insulation performance, which seriously deviates from the original intention of the product, and the proposed method for the preparation of environmentally friendly biodegradable PBAT foaming materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] The preparation method of environment-friendly biodegradable PBAT foaming material comprises the following steps:

[0050] (1): Put 30-60 parts of butylene adipate polymer and 10-40 parts of polylactic acid into screw extruder 1, add 1-5 parts of organically modified montmorillonite, and melt to form Fluid hot melt 1; compared with single-component PLA, in PLA / MMT nanocomposites, the addition of nano-MMT can improve the modulus, strength, heat resistance and degradation characteristics of the polymer, but currently The intercalant used in the organic process of MMT is a long-chain alkylammonia, and the coupling between the intercalant and PLA only depends on the relatively weak intermolecular van der Waals force, resulting in the PLA segment in the PLA / MMT composite material It cannot really enter the interlayer of MMT. Most of the MMT exists in the composite material in the form of fillers. Only a small part of MMT realizes the nano-composite with PLA, resulting in the...

Embodiment 1

[0069] The preparation method of environment-friendly biodegradable PBAT foaming material comprises the following steps:

[0070] (1): Put 40 parts of butylene adipate polymer and 20 parts of polylactic acid into screw extruder 1, add 3 parts of organically modified montmorillonite, the operating temperature of screw extruder 1 Melting at 200°C to form a fluid hot melt; compared with single-component PLA, in PLA / MMT nanocomposites, the addition of nano-MMT can improve the modulus, strength, and heat resistance of the polymer. However, the intercalation agent used in the organic process of MMT is long-chain alkylammonia, and the intercalation agent and PLA are only coupled by weaker intermolecular van der Waals forces, resulting in PLA / MMT The PLA segment in the composite material cannot really enter the interlayer of MMT. Most of the MMT exists in the composite material in the form of fillers. Only a small part of MMT achieves nanoscale composite with PLA, resulting in the add...

Embodiment 2

[0079] Compared with Example 1, except that no degradation agent is added in step (2) in this example, the rest are the same.

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Abstract

The invention discloses a preparation method of an environment-friendly biodegradable PBAT foaming material, and belongs to the technical field of degradable foaming materials. The preparation method of the environment-friendly biodegradable PBAT foaming material comprises the following steps: putting 30-60 parts of a butylene adipate polymer and 10-40 parts of polylactic acid into a screw extruder I, adding 1-5 parts of organic modified montmorillonite, and melting to form a hot melt I with fluidity; putting 1-30 parts of a molecular chain modifier and 1-10 parts of a degradation agent into a screw extruder II, and melting to form a hot melt II with flowability; putting 5-10 parts of thermoplastic starch and 1-3 parts of plant fibers into a stirrer, and stirring; feeding the hot melt I, the hot melt II and the mixture into a screw reactor, and then adding 1-10 parts of a chain extender; the reaction melt discharged from the outlet of the screw reactor is pumped into a screw extruder III; according to the invention, the reduction of rigidity and heat resistance of the material caused by PBAT is compensated, and good water-proof and heat-insulation functions are maintained while the degradation capability is ensured.

Description

technical field [0001] The invention relates to the technical field of degradable foaming materials, in particular to a preparation method of environmentally friendly biodegradable PBAT foaming materials. Background technique [0002] High molecular polymers have been widely used in the manufacture of all fields related to human life from aircraft to clothing, but because most of the polymers are derived from organic hydrocarbons, their waste cannot be degraded for decades or even hundreds of years, while Such polymers can be made directly or foamed into daily-use packaging materials, lunch boxes, consumables, electronic films, agricultural films and other fast-consumables. China alone produces millions of tons of non-degradable lunch boxes and non-degradable plastic packaging bags every year, and the average service life is less than 20 minutes. It has brought immeasurable pressure on the environment and resources, and the whole society, including the government, enterpris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L3/02C08L97/02C08L75/04C08K3/34C08K9/04C08K3/22C08J9/14C08J9/00
CPCC08J9/141C08J9/0061C08J2367/02C08J2467/04C08J2403/02C08J2497/02C08J2475/04C08J2203/14C08K3/346C08K9/04C08K2003/2241
Inventor 丁枫肖文站郭奎张强
Owner 珠海四唯新材料科技有限公司
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