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A Novel Photobiodegradable Plastic Material

A technology of photobiodegradation and plastic materials, which is applied in the field of photobiodegradation plastic materials, can solve the problems of slow degradation, easy deterioration, short service life, etc., and achieve the effect of enhancing oxidation resistance and degradation speed

Active Publication Date: 2015-08-12
山东万华塑编有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, in order to solve the problem of white pollution, photobiodegradable plastics were produced, which made full use of the dual effects of biodegradation and photodegradation, so that the degradation effect was significantly improved, but the photobiodegradable plastics of the prior art had poor oxidation resistance and thermal stability. Poor performance, short service life, slow degradation and other defects, easy to oxidize in the exposed environment, easy to deteriorate when used in a high temperature environment, etc.

Method used

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  • A Novel Photobiodegradable Plastic Material
  • A Novel Photobiodegradable Plastic Material
  • A Novel Photobiodegradable Plastic Material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A novel photobiodegradable plastic material, its components and weight percentages are:

[0016]

[0017]

[0018] The balance is polyvinyl alcohol.

[0019] In a high-speed mixer, polyvinyl alcohol, polyalcohol, organic aldehyde compound, carbon black, nano-SiO 2 After stirring for half an hour, heat up to 140°C, maintain for 15 minutes, add other ingredients and stir, heat up to 180°C, maintain for half an hour, and granulate.

Embodiment 2

[0021] Carry out biodegradation experiment and photocatalytic degradation experiment to the novel photobiodegradable plastic material in embodiment 1 (recorded as sample 1) and existing photobiodegradable plastic material (recorded as sample 2):

[0022] The components and weight ratios of existing photobiodegradable plastic materials are:

[0023] Polyvinyl alcohol 40; polyol 16; ethylene-acrylic acid copolymer 30; acetaldehyde 13.7; photosensitizer cerium stearate 0.3.

[0024] Biodegradation test method: the above two samples were dried at 55°C for 12 hours, ground, weighed, and diluted with 100 times distilled water to adjust the pH value to 4.8, adding 1% liquefying enzyme and 4% glucoamylase under magnetic stirring at 30°C, The residue after enzymolysis was washed with water to clean the gelatinized matter on the surface, dried at 55°C for 12 hours and weighed. Determination of the degradation percentage of different enzymatic hydrolysis time.

[0025] The experimental...

Embodiment 3

[0033] The oxidation resistance, thermal stability and service life of samples 1 and 2 were tested experimentally:

[0034] Placed in an outdoor environment with an average temperature of 20 degrees, it was found that after 200 days of use of sample 1, the sample became gray and dark and spot hardening occurred; after 150 days, the sample 2 appeared gray and dark and spot hardening appeared.

[0035] Placed in an indoor environment with a temperature of 60 degrees, it was found that sample 1 turned yellow and became brittle after 120 days of use; sample 2 turned yellow and brittle after 60 days.

[0036] The experimental results found that sample 1 added SiO 2 When the weight percentage is 0.6, sample 1 is placed in an outdoor environment with an average temperature of 20 degrees, and the service life increases from 200 days to 240 days. Adding nano-calcium carbonate and maleic anhydride can significantly improve thermal stability and service life. In an indoor environment wi...

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Abstract

The invention provides a novel photo-biodegradable plastic material. By adding carbon black, nano-SiO2, thiobisphenol, phosphite ester, and calcium, barium soap and other ingredients, and defining the content of each ingredient, a very good synergistic effect can be achieved among the added ingredients and between the ingredients and polyvinyl alcohol. On the basis of maintaining the original good degradation performance, the oxidation resistance, the thermal stability, the service life, and the degradation rate are all significantly improved.

Description

technical field [0001] The invention relates to a photobiodegradable plastic material, in particular to a photobiodegradable plastic material with good oxidation resistance and thermal stability. Background technique [0002] In the prior art, in order to solve the problem of white pollution, photobiodegradable plastics were produced, which made full use of the dual effects of biodegradation and photodegradation, so that the degradation effect was significantly improved, but the photobiodegradable plastics of the prior art had poor oxidation resistance and thermal stability. Poor performance, short service life, slow degradation and other defects, it is easy to oxidize in an exposed environment, and it is easy to deteriorate when used in a high temperature environment. Contents of the invention [0003] The invention provides a novel photobiodegradable plastic material, by adding carbon black, nano-SiO 2 , thiobisphenol, phosphite and calcium, barium soap and other compon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L23/08C08K13/02C08K5/053C08K5/098C08K5/07C08K3/36C08K3/26C08K5/1539
Inventor 章磊
Owner 山东万华塑编有限公司