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Modification method of degradable plastic packaging material

A technology for packaging materials and degradable plastics, applied in the field of modification of degradable plastic packaging materials, can solve the problems of improving the mechanical properties, crystallization properties and degradation properties of PBS at the same time, unable to achieve sustainable development of resource utilization, poor notched impact strength To achieve good renewable and degradable properties, improve interfacial compatibility, and improve interfacial performance

Inactive Publication Date: 2020-04-07
安徽华赛包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polybutylene succinate (PBS) is a completely biodegradable green polymer material with excellent mechanical strength and heat resistance. However, PBS has defects such as poor notched impact strength and slow degradation rate, which limits the its further application
Blending modification is a commonly used method for PBS modification research at present, but it is difficult to simultaneously improve the mechanical properties, crystallization properties and degradation properties of PBS by traditional blending modification methods
[0003] The non-degradability of traditional plastics leads to the problem of "white pollution", and because it is derived from petroleum-based raw materials,
[0004] The sustainable development of resource utilization cannot be achieved, so it is necessary to develop degradable plastics to replace traditional plastics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for modifying degradable plastic packaging materials, the specific production process is as follows:

[0027] The first step: the coupling agent can react with the hydroxyl groups on the surface of the bamboo fiber, and the treatment with the coupling agent reduces the surface polarity of the bamboo fiber, improves the interfacial compatibility between the bamboo fiber and the matrix, and improves the composite material. Tensile strength and impact strength, flexural strength and modulus; 14 parts of bamboo fibers with a particle size of 60 mesh were dried in an electric blast drying oven at 80°C, and 0.28 parts of silane coupling agent KH570 was dissolved in 75% ethanol at 1:10 solution, and then evenly sprayed on the bamboo fiber, stirred fully and reacted, and vacuum-dried at 80°C to obtain the coupling agent-treated bamboo fiber;

[0028] Then use biological enzyme pectinase to enhance the surface roughness of bamboo fiber, the adhesion between bamboo fiber...

Embodiment 2

[0037] A method for modifying degradable plastic packaging materials, the specific production process is as follows:

[0038] The first step: The method of treating bamboo fiber with coupling agent: Dry 20 parts of bamboo fiber with a particle size of 60 mesh in an electric blast drying oven at 85°C, and dissolve 0.4 part of silane coupling agent KH570 in 75% ethanol at 1:10 solution, and then evenly sprayed on the bamboo fiber, after stirring and reacting fully, vacuum-dried at 85°C to obtain the coupling agent-treated bamboo fiber;

[0039] The method of biological enzyme treatment of bamboo fiber: put the citric acid-sodium citrate buffer solution with a pH of 4 in a 55°C water bath and heat it, add 4 parts of pectinase and 20 parts of coupling agent to treat the bamboo fiber, and after 5 hours of biological enzyme treatment , taken out, filtered with a 200-mesh sieve, washed with water until neutral, and vacuum-dried at 75°C to obtain biological enzyme-treated bamboo fiber...

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PUM

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Abstract

The invention discloses a modification method of a degradable plastic packaging material, which comprises the following steps: (1) placing a citric acid-sodium citrate buffer solution in a water bathfor heating, adding pectinase and a coupling agent to treat bamboo fibers, carrying out bio-enzyme treatment, taking out the bamboo fibers, filtering the bamboo fibers with a screen mesh, washing thebamboo fibers with water to a neutral state, and carrying out vacuum drying to obtain bio-enzyme treated bamboo fibers; (2) adding 1-methylimidazole and esterified reed cellulose into ethanol, carrying out a stirring reaction in a water bath, carrying out washing with absolute ethyl alcohol, carrying out centrifuging, and carrying out vacuum drying to obtain ionic liquid modified esterified reed cellulose; and (3) preparing a degradable plastic packaging material, namely, drying polybutylene succinate in vacuum and putting the polybutylene succinate into an internal mixer, adding salinized polyester elastomer particles, the bio-enzyme treated bamboo fibers and the ionic liquid modified esterified reed cellulose, mixing the substances, discharging the blend, adding the blend into a double-screw extruder through a hopper, carrying out blending through the extruder, extruding the blend into a charging barrel of an injection molding machine through a discharge port, and carrying out injection molding.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a modification method of degradable plastic packaging materials. Background technique [0002] In the 21st century, the problems of resource shortage and environmental pollution faced by human beings have become increasingly severe. Polybutylene succinate (PBS) is a completely biodegradable green polymer material with excellent mechanical strength and heat resistance. However, PBS has defects such as poor notched impact strength and slow degradation rate, which limits the its further application. Blending modification is a commonly used method for PBS modification research at present, but it is difficult to improve the mechanical properties, crystallization properties and degradation properties of PBS at the same time by traditional blending modification methods. [0003] The non-degradability of traditional plastics leads to the problem of "white pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/06C08L1/02C08L1/10D06M13/513D06M16/00C08B15/06C08B3/12B65D65/46D06M101/06
CPCB65D65/466C08B3/12C08B15/06C08L67/02C08L2201/06C08L2205/02C08L2205/035C08L2205/16D06M13/5135D06M16/003D06M2101/06C08L67/06C08L1/02C08L1/10Y02W90/10
Inventor 林义雄
Owner 安徽华赛包装有限公司
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