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Phosphate starch biodegradable film and preparation method thereof

A technology of biodegradable film and phosphate ester, which is applied in the field of environmental science and natural polymer materials, can solve problems such as the production of ideal complete biodegradable materials, and achieve the protection of ecological environment, elongation at break and tensile strength The effect of increased strength and high technological content

Inactive Publication Date: 2012-06-20
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the starch-degradable materials produced in my country are incompletely degradable materials. Starch is only used as a filler or additive photodegradable plastic, and there is no ideal production of completely biodegradable materials.

Method used

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  • Phosphate starch biodegradable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Commercially available high-quality cornstarch is selected, processed by freeze-drying, and then passed through a 40-mesh sieve. Then 30g of the sieved sample was added to a three-necked flask together with 4g of polyvinyl alcohol and 10ml of glycerin, and dissolved in 500ml of distilled water; at the same time, the temperature was adjusted to 60°C, and the sample was heated in a water bath and magnetically stirred. After stirring for 1 hour, 14ml of glyoxal and 3.2g of FeCl were added to the flask 3 ·6H 2 O and other reagents, then adjust the temperature to 80°C, heat in a water bath and stir magnetically for 30 minutes. Starch reaches a certain viscosity after swelling, gelatinization, and cross-linking reactions. Take out the reaction product, spread it evenly on the polyester sheet, put it in an oven, and dry it at 50°C. When the flat film is not sticky, take out the polyester sheet and let it cool naturally in the air, then peel off the film and seal it. Set asi...

Embodiment 2

[0024] Commercially available high-quality cornstarch is selected, processed by freeze-drying, and then passed through a 40-mesh sieve. Then add 30 g of the sieved sample into a three-neck flask together with 4 g of polyvinyl alcohol, 2 g of urea, 2 ml of phosphoric acid, and 10 ml of glycerin, and dissolve it in 500 ml of distilled water; at the same time, adjust the temperature to 60 ° C, heat the sample in a water bath and magnetically stir the sample. After stirring for 1 hour, 14ml of glyoxal and 3.2g of FeCl were added to the flask 3 ·6H 2 0 and other reagents, then adjust the temperature to 80°C, heat in a water bath and stir magnetically for 30 minutes. Starch reaches a certain viscosity after swelling, gelatinization, and cross-linking reactions. Take out the reaction product, spread it evenly on the polyester sheet, put it in an oven, and dry it at 50°C. When the flat film is not sticky, take out the polyester sheet and let it cool naturally in the air, then peel o...

Embodiment 3

[0026] Commercially available high-quality cornstarch is selected, processed by freeze-drying, and then passed through a 40-mesh sieve. Then add 30g of the sieved sample into a three-necked flask together with 4g of polyvinyl alcohol, 4g of urea, 4ml of phosphoric acid, and 10ml of glycerin, and dissolve in 500ml of distilled water; at the same time, adjust the temperature to 60°C, heat the sample in a water bath and magnetically stir the sample. After stirring for 1 hour, 14ml of glyoxal and 3.2g of FeCl were added to the flask 3 ·6H 2 O and other reagents, then adjust the temperature to 80°C, heat in a water bath and stir magnetically for 30 minutes. Starch reaches a certain viscosity after swelling, gelatinization, and cross-linking reactions. Take out the reaction product, spread it evenly on the polyester sheet, put it in an oven, and dry it at 50°C. When the flat film is not sticky, take out the polyester sheet and let it cool naturally in the air, then peel off the fi...

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Abstract

The invention discloses a phosphate starch biodegradable film and a preparation method of the phosphate starch biodegradable film, and is characterized in that the phosphate starch biodegradable film contains starch, polyvinyl alcohol, glyoxal, urea, phosphoric acid and glycerol; and phosphate starch is a mixture of starch, glyoxal, phosphoric acid, urea and polyvinyl alcohol. The invention has the advantages as follows: starch is treated with an appropriate amount of modification cross-linking agent, so as to greatly improve the water resistance of plastics; pure starch has high brittleness,and an appropriate amount of plasticizer is adopted to enhance ductility of the film, which is more suitable for industrial mass production; the material is endowed with different mechanical properties by adjusting the contents of phosphoric acid and urea and the consumption of plasticizer, with high technological content and novelty; the preparation process adopts conventional plastic process equipment and method, has a simple process and is easy to operate; the film is made from commercial starch by modification, plasticization and tape casting and is easily decomposed by microorganisms into carbon dioxide and water, with no environmental pollution; and starch is a renewable resource which is inexhaustible in supply and always available for use.

Description

technical field [0001] The invention belongs to the field of natural polymer materials, relates to a phosphate starch biodegradable film and a preparation method thereof, and also belongs to the field of environmental science and technology. Background technique [0002] With the increasing shortage of petroleum resources and people's increasing concern about green environmental issues, the plastics industry is focusing more on materials research on raw materials derived from natural and renewable resources. Starch is an inexhaustible renewable resource on the earth, and they have a variety of structures, easy to chemical and physical modification, and have the advantages of biodegradability, biocompatibility and safety. The development and promotion of renewable resource products is not only conducive to the protection of the ecological environment, but also conducive to the development of new crops and new chemical technologies, as well as the promotion of agricultural gro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/06C08L29/04C08J5/18C08J3/24B65D65/46A01G13/02
CPCY02W90/10Y02A40/90
Inventor 徐卫河刘伯业郭东权陈复生王红娟何乐刘昆仑布冠好张鹏龙王洪杰杨颖莹高艳秀刘岭李彦磊
Owner HENAN UNIVERSITY OF TECHNOLOGY
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