Thermoplastic biodegradable material and preparation method thereof

A biodegradable material and thermoplastic technology, applied in the field of biochemistry, can solve the problems of easy recrystallization, complex process, poor heat and water resistance, and achieve strong anti-aging and embrittlement ability, reduce complex process steps, and heat and water resistance. strong effect

Active Publication Date: 2014-04-16
NANTONG LONGDA BIO TECH NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The process is complex, and the starch is separated from the linear chain and the branched chain. The process is complicated, which is one of the reasons that affects the cost.
[0006] 2. Compared with ordinary plastics, thermoplastic starch plastics produced at this stage have poor heat and water resistance and low mechanical strength
[0007] 3. The thermoplastic starch-based materials produced at this stage are prone to recrystallization, aging and brittleness during the placement process and lose their usability
It is sensitive to water, and its hydraulic performance will decrease, so it is not suitable for wide application
[0008] 4. Due to the production process, formula and other reasons, the cost of the product has increased, and the price of the final product is relatively high, which is not easy to promote in the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 20 grams of potato starch, 2.5 grams of polyglycolide, 10 grams of bran, 12 grams of straw, 10 grams of chitin, 2.2 grams of benzophenone, 1.4 grams of p-benzoquinone, 8 grams of copper carbonyl, polypropylene carbonate Esters 12 grams.

[0023] Firstly, add potato starch, polypropylene carbonate and polyglycolide into a mixing speed machine with a rotation speed of 1000 rpm and mix for 5 minutes, then add bran, straw, chitin, benzophenone, p-benzoquinone and carbonyl Copper is mixed 5 minutes in the mixing speed machine of 2000 rev / min with rotating speed; The mixture is closed and placed for 12 hours; The outlet temperature is 120°C, 120°C, 130°C, 130°C, 120°C, and finally placed in a drum granulator at 200 rpm for granulation to make a thermoplastic biodegradable material. The plastic products made of the prepared materials have improved thermoplasticity, formability increased by 25%, and biodegradability increased by 22%.

Embodiment 2

[0025] Weigh 15 grams of tapioca starch, 3 grams of polyglycolide, 10 grams of chaff, 12 grams of bran, 12 grams of chitin, 2.5 grams of benzophenone, 1.6 grams of p-benzoquinone, 10 grams of carbonyl iron, polycarbonate Propyl ester 10 grams.

[0026] Firstly, tapioca starch, polypropylene carbonate and polyglycolide were added to the mixing speed machine at 3000 rpm and mixed for 10 minutes, then added chaff, bran, chitin, benzophenone, p-benzoquinone and The carbonyl iron was mixed for 10 minutes in a mixing speed machine at a speed of 3000 rev / min; the mixture was sealed and placed for 24 hours; The extrusion temperature was 120°C, 120°C, 130°C, 130°C, 120°C in sequence, and finally placed in a drum granulator at 200 rpm for granulation to produce thermoplastic biodegradable materials. The plastic products made of the prepared materials have improved thermoplasticity, formability increased by 16%, and biodegradability increased by 18%.

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PUM

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Abstract

The invention aims to solve the problems that conventional plastic products are degraded hardly and can cause white pollution and other serious environmental problems in the prior art, and provides a thermoplastic biodegradable material. The thermoplastic biodegradable material comprises the following raw materials by weight: 10-20 g of starch, 2.5-4 g of a plasticizer, 12-25 g of cellulose, 8-12 g of chitin, 2.0-3.5 g of benzophenone, 1-1.5 g of p-benzoquinone, 2-10 g of carbonyl compound and 10-20 g of polypropylene carbonate. According to the thermoplastic biodegradable material, the adopted starch is wide in source and low in price, the added cellulose is a natural macromolecule, and has excellent biodegradability, and the chitin is adopted, so that the thermoplastic biodegradable material has high heat resistance, water resistance, ageing resistance and fracture resistance. Meanwhile, the invention further provides a preparation method for the thermoplastic biodegradable material, the process is simple, the operation is easy, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of biochemistry, in particular to a thermoplastic biodegradable material and a preparation method thereof. Background technique [0002] Traditional plastics are derived from petroleum. With the rapid development of the global economy, the demand for petroleum in various countries is increasing year by year, and petroleum resources will inevitably be exhausted. Therefore, in the face of the two major problems of environmental pollution and resource shortage, the development of biodegradable plastics has become a hot topic of social concern and technical research in the industry. [0003] Biodegradable plastic refers to a type of plastic that is degraded by the action of microorganisms such as bacteria, mold (fungi) and algae that exist in nature under certain conditions. The ideal biodegradable plastic is a polymer material that has excellent performance, can be completely decomposed by environmental microorganisms a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08L3/02C08L69/00C08L5/08C08L67/04C08K5/07C08K5/08C08K5/56B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 梁凯
Owner NANTONG LONGDA BIO TECH NEW MATERIALS CO LTD
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