Starch-base degradable bioplastic and preparing method thereof

A bioplastic and starch-based technology, which is applied in the field of starch-based degradable bioplastics and its preparation, can solve the problems of insufficient starch hydrophobicity, pollution of plastic garbage bags, and decreased mechanical strength, and achieve improved hydrophobicity, small investment, and easy The effect of control

Inactive Publication Date: 2016-05-11
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional general-purpose polymer materials are difficult to be degraded by microorganisms due to their nature, that is, they will not rot and mildew, and then they will remain in the existing life for a long time. Therefore, the problem of plastic garbage bag pollution is becoming more and more serious, causing widespread worldwide At present, there are existing general-purpose polymer materials that cannot be degraded by microorganisms, which are prepared by adding a certain proportion of natural polymer materials that can be degraded by microorganisms, such as starch, cellulose, protein, chitin, e

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of described starch-based degradable bioplastics comprises the following steps:

[0018] First dry 100kg of corn starch in a drying oven at 100°C for 4 hours, then weigh 40kg of the dried starch and add it to a mixer, and stir at 2500r / min. When the starch temperature is 80°C, the modifier The dibenzoyl peroxide solution is injected into a high mixer through a syringe and mixed with starch. The dosage of the modifier dibenzoyl peroxide solution is 0.2 kg. After stirring for 30 minutes, add 0.08 kg of nano-silica particles and continue stirring for 10 minutes. , to obtain highly hydrophobic starchy materials, then 5kg of saturated triglycerides and natural vegetable oil mixture, 5kg of zinc stearate are mixed, and made into master batches with twin-screw extruders, master batches and 50kg of polypropylene After mixing, injection molding, edge pressing, blow molding, and air molding are made into starch-based degradable bioplastics.

Embodiment 2

[0020] The preparation method of described starch-based degradable bioplastics comprises the following steps:

[0021] First dry 100kg of sorghum starch in a 110°C drying oven for 4 hours, then weigh 50kg of the dried starch and add it to a mixer, and stir at 2700r / min. When the starch temperature is 90°C, the modifier The peroxybenzoic acid solution is injected into the high mixer through a syringe and mixed with the starch. The dosage of the modifier peroxybenzoic acid solution is 0.25 kg. After stirring for 30 minutes, add 0.1 kg of nano-silicon dioxide particles, and continue stirring for 10 minutes to obtain high hydrophobicity. Starch material, then 5kg of unsaturated triglyceride and natural vegetable oil mixture, 5kg of manganese stearate are mixed, and made into masterbatch with a twin-screw extruder, after the masterbatch is mixed with 40kg of polystyrene , Injection molding, edge pressing, blow molding, and air molding are made into starch-based degradable bioplasti...

Embodiment 3

[0023] The preparation method of described starch-based degradable bioplastics comprises the following steps:

[0024] Dry 100kg of potato starch in a drying oven at 120°C for 4 hours first, then weigh 35kg of the dried starch and add it to a mixer, and stir at 3000r / min. When the starch temperature is 100°C, the modifier The cumene hydrogen peroxide solution is injected into the high mixer through a syringe and mixed with the starch. The amount of the modifier cumene hydrogen peroxide solution is 0.175 kg. After stirring for 30 minutes, add 0.07 kg of nano-silica particles and continue stirring for 10 minutes. , to obtain highly hydrophobic starchy material, then the monoglyceride and triglyceride mixture of 2.5 unsaturated fatty acids, the oleate of zinc of 2.5kg are mixed, make master batch with twin-screw extruder, master batch and After 60kg of polyvinyl chloride is mixed, injection molding, edge pressing, blow molding, and air molding are made into starch-based degradabl...

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PUM

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Abstract

The invention relates to starch-base degradable bioplastic and a preparing method thereof, and belongs to the technical field of biodegradable materials. The starch-base degradable bioplastic is prepared from 40-85% of commodity polymer plastic, 10-50% of a high-hydrophobicity starchiness material, 0.5-5% of aliphatic polyester and 0.1-5.5% of oxidation accelerator. The preparing method of the starch-base degradable bioplastic includes the following steps that starch is treated in a hydrophobization mode to obtain the high-hydrophobicity starchiness material, the raw material components are mixed by a ratio and prepared into master batch through a twin-screw extrusion machine, and after the master batch and the commodity polymer plastic are mixed, the starch-base degradable bioplastic is prepared through injection molding, flattening, blow molding, vacuumizing and forming. The product prepared through the method can be used repeatedly on the dry condition without perpendicular sunlight incidence, the strength is kept unchanged basically, an abandoned product is completely decomposed finally in wet soil, no harmful component is generated, and the environment is not polluted.

Description

technical field [0001] The invention relates to a starch-based degradable bioplastic and a preparation method thereof, belonging to the technical field of biodegradable materials. Background technique [0002] As a synthetic polymer material, plastic is widely used in home appliances, automobiles, etc. , furniture, packaging supplies, agricultural film and many other aspects, the extensive use of plastics has produced many disposable plastic wastes that cannot be recycled, resulting in increasingly serious "white pollution", such as groundwater pollution and soil pollution, animal and plant resources It is destroyed and seriously threatens the survival and health of human beings. Starch plastics, also known as starch-based plastics, generally refer to plastics whose composition contains starch or its derivatives. Plastics with natural starch as filler and plastics with natural starch or its derivatives as the main component of the blend system belong to this category. [0...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L91/00C08L23/12C08L25/06C08L27/06C08K13/02C08K5/14C08K3/36C08K5/103C08K5/098
CPCC08K2201/011C08L3/02C08L2201/06C08L2205/03C08L91/00C08L23/12C08K13/02C08K5/14C08K3/36C08K5/103C08K5/098C08L25/06C08L27/06
Inventor 马海清刘刚林航
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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