Completely biodegradable hydrophobic material and its prepn

A biodegradable material and a biodegradable technology are applied in the field of starch-based hydrophobic completely biodegradable materials and their preparation, which can solve the problems of no functional group that can be reacted with hydroxyl again, and no active reaction center of polylactone that can be reacted with hydroxyl. , to achieve the effect of improving elongation at break, hydrophobic performance and compatibility

Inactive Publication Date: 2005-12-14
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is no functional group in the molecular structure of the polylactone that can react with the hydroxyl group
[0021] In the above-mentioned documents, although some polylactones containing unsaturated double bonds have been prepared, they are all prepared by solution method, and the prepared polylactones have no active reaction centers that can react with hydroxyl groups.

Method used

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  • Completely biodegradable hydrophobic material and its prepn
  • Completely biodegradable hydrophobic material and its prepn
  • Completely biodegradable hydrophobic material and its prepn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Weigh 45Kg of cornstarch, 178820Kg of polyvinyl alcohol, 2Kg of polycaprolactone, 15Kg of glycerin, 0.4Kg of borax, 3Kg of EVA, 0.4Kg of stearic acid, and 1Kg of succinic acid into the high-speed mixer in sequence, stir for 5 minutes, and discharge.

[0074] Extrude the above-mentioned mixed material, the barrel temperature of the extruder is: 130°C, 150°C, 160°C, 170°C, 180°C, 180°C, 190°C, 190°C, the die head temperature is 180°C, the screw speed 100rpm. Add ε-caprolactone monomer 1.5kg, butyl methacrylate monomer 0.01kg, catalyst hydroxyethyl titanate tetraacrylate 0.005kg, α-hydroxycyclohexyl benzophenone to the side feeding port of the extruder 0.01kg, the side screw speed is about 10rpm, the material in the main feeding port and the material in the side feeding port are used up almost at the same time. The film product obtained by extrusion blow molding is tested by the method specified in GB1040-1979: the tensile strength of the product is 16.1MPa, and the elong...

Embodiment 2

[0076] Weigh 50Kg of cornstarch, 20Kg of PVA 1788, 2Kg of polylactic acid, 15Kg of glycerin, 0.4Kg of borax, 3Kg of EVA, 0.4Kg of stearic acid, and 1Kg of succinic anhydride, and add them into the high-speed mixer in sequence, stir for 5 minutes, and discharge.

[0077] Extrude the above-mentioned mixed material, the barrel temperature of the extruder is: 130°C, 150°C, 160°C, 170°C, 180°C, 180°C, 190°C, 190°C, the die head temperature is 180°C, the screw speed 100rpm. Add 1.5kg of lactide monomer, 0.01kg of butyl methacrylate monomer, 0.005kg of catalyst methyl titanate tetraacrylate, and 0.01kg of azobisisobutyronitrile at the side feeding port of the extruder, The screw speed is about 10rpm, and the material in the main feeding port and the side feeding port are used up almost simultaneously. The extruded sheet product is tested by the method specified in GB1040-1979: the tensile strength of the product is 17.3MPa, and the elongation at break is 140%; the method specified b...

Embodiment 3

[0079] Weigh 45Kg of corn starch, 1799 20Kg of polyvinyl alcohol, 2Kg of poly 3-hydroxybutyl ester (PHB), 18Kg of glycerin, 0.3Kg of borax, 3 Kg of EVA, 0.5Kg of stearic acid, 1Kg of adipic acid, and add them into the high-speed mixer in turn , start stirring for 5 minutes, and discharge.

[0080] Extrude the above-mentioned mixed material, the barrel temperature of the extruder is: 130°C, 150°C, 160°C, 170°C, 180°C, 180°C, 190°C, 190°C, the die head temperature is 180°C, the screw speed At 100rpm, add lactide monomer 0.75kg, ε-caprolactone monomer 0.75kg, butyl methacrylate monomer 0.01kg, catalyst stannous octoate 0.005kg, 2 , 0.01kg of 2-dimethoxyl-2-phenylacetophenone, the side screw speed is about 10rpm, the material in the main feeding port and the material in the side feeding port are used up almost simultaneously. Extrude the product, and use the method specified in GB1040-1979 to test: the tensile strength of the product is 15.7MPa, and the elongation at break is 120...

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Abstract

The present invention discloses one kind of completely biodegradable hydrophobic material and its preparation process. The starch-base biodegradable material is prepared through reaction and extrusion in extruder of the following material: starch, PVA, lactone polymer capable of reacting with hydroxy group, biodegradable polymer, initiator and other assistant. The present invention has the advantages of low cost, high hydrophobicity of the product, simple operation, complete biodegradation of the material to eliminate 'white pollution', etc. The present invention is suitable for continuous production.

Description

technical field [0001] The invention relates to a starch-based hydrophobic fully biodegradable material and a preparation method thereof. technical background [0002] As we all know, among the various materials considered for the preparation of biodegradable products, starch is the most potential raw material. The potential advantages of starch as a biodegradable plastic are: (1) starch has complete biodegradability in various environments; (2) after starch molecules are biodegraded, they are finally decomposed into CO 2 and H 2 O, will not cause any pollution to the soil or air; (3) adopt appropriate technology to make the starch thermoplastic to achieve the mechanical properties used to make plastic materials; (4) starch is a renewable resource, inexhaustible; ( 5) Opening up new application fields of starch is conducive to the development of rural economy; (6) The cost of starch is low, and the prepared biodegradable material has a price advantage. [0003] In recent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02
Inventor 吴张永陆冲林嘉平周达飞程树军夏浙安
Owner EAST CHINA UNIV OF SCI & TECH
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