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Hydrophobic completely biological degradable materials and preparing method thereof

A biodegradable material and biodegradable technology, applied in the field of fully biodegradable materials and their preparation, can solve the problems of incomplete biodegradation, poor weather resistance, application restrictions, etc., to solve the problem of white pollution, reduce production costs, and make products hydrophobic sex high effect

Inactive Publication Date: 2005-02-23
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Due to the fact that most starch-based biodegradable materials and products are not water-resistant or even water-soluble, they also have shortcomings such as oil resistance, poor weather resistance, and some cannot be completely biodegradable, which limits their application in many fields.

Method used

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  • Hydrophobic completely biological degradable materials and preparing method thereof
  • Hydrophobic completely biological degradable materials and preparing method thereof
  • Hydrophobic completely biological degradable materials and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Weigh 45Kg cornstarch, 20Kg PVA1788, 1Kg gelatin, 15Kg polycaprolactone, 15Kg glycerin, 0.4Kg borax, 3Kg EVA, add them into the high-speed mixer in turn, start stirring, and then add 1.5Kg reactive hydrophobic additive ethylene glycol Base (dioctyl pyrophosphate) titanium, 0.4Kg stearic acid, 1Kg succinic acid, continue stirring for 5min, and discharge.

[0068] 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 100 rpm, extrude to obtain a product.

[0069] Tested by the method specified in GB1040-1979: the tensile strength of the product is 15.4MPa, and the elongation at break is 110%; tested by the method specified in ASTM D5725-99, the contact angle of the material is 73°, and the hydrophobicity is excellent; according to According to the method specified in GB / T 18006.2-1999, the material can be degraded by 90% in 6 mont...

Embodiment 2

[0071] Weigh 50Kg cornstarch, 20Kg PVA1788, 1Kg gelatin, 15Kg polylactic acid, 15Kg glycerin, 0.4Kg borax, 3Kg EVA, add them into the high-speed mixer in turn, start stirring, then add the reactive hydrophobic additive tetrakis (2,2 diene Propoxymethyl-1-butyl)bis[bis(tridecyl)phosphite]titanium 1.5Kg, stearic acid 0.4Kg, succinic acid 1Kg, continue stirring for 5min, and discharge.

[0072] Extrude the above-mentioned mixed material, the barrel temperature of the extruder is: 110°C, 135°C, 155°C, 170°C, 180°C, 180°C, 190°C, 190°C, the die head temperature is 185°C, the screw The rotational speed was 130 rpm, and the product was obtained by extrusion.

[0073] Tested by the method specified in GB040-1979: the tensile strength of the product is 16.1MPa, and the elongation at break is 100%; tested by the method specified in ASTM D5725-99, the contact angle of the material is 78°, and the hydrophobicity is excellent; according to According to the method specified in GB / T 18006.2...

Embodiment 3

[0075] Weigh cornstarch 45Kg, PVA1799 20Kg, 1Kg gelatin, PHB 15Kg, glycerin 18Kg, borax 0.3Kg, EVA3 Kg, add in the high-speed mixer successively, start stirring, then add reactive type hydrophobic additive ethylene glycol (pyrophosphate di Octyl) titanium 1.6Kg, stearic acid 0.5Kg, succinic acid 1Kg, continue to stir for 5min, discharge.

[0076] 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 Extruded at 100rpm, the product was obtained, and the method specified in GB040-1979 was used for testing: the tensile strength of the product was 15.7MPa, and the elongation at break was 120%; the method specified in ASTM D5725-99 was used for testing, and the contact angle of the material was 74°, excellent hydrophobicity. According to the method specified in GB / T 18006.2-1999, the material can be degraded by 86% in 6 months and can be compl...

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Abstract

A hydrophobic bio-degradable material is prepared from a mixture selected one or more from starch, polyvinyl alcohol, bio-degradable polymer, plastifier, cross linking agent, fortifier, lubricant and additives, by mixing, reacting, and extruding to form products in various shapes, or preparing mother materials and then extruding, injecting, blowing or sucking to form products or with other materials. The products cost low, have good hydrophobicity and degradation, so as to prevent from white pollution. It is produced simply to modify and to shape simultaneously and continuously.

Description

technical field [0001] The invention relates to a fully biodegradable material and a preparation method thereof, in particular to an extrusion preparation method of a starch-based hydrophobic fully biodegradable material. 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,...

Claims

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Application Information

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IPC IPC(8): C08K5/51C08L3/02C08L29/04
Inventor 吴张永陆冲林嘉平周达飞程树军
Owner EAST CHINA UNIV OF SCI & TECH
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