Biodegradable composite material and preparation method thereof

A composite material and biodegradable technology, which is applied in the field of biodegradable composite materials and their preparation, can solve the problems of mechanical properties to be improved, limited application range, complex production process, etc., achieve excellent biodegradability, expand application fields, and solve white pollution effect

Inactive Publication Date: 2013-08-14
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, polylactic acid is rarely used as a practical product, mainly due to its own defects such as low strength, low toughness and low heat resistance temperature, which limit the scope of application.
Chinese patent 200810218680.9 introduces a polylactic acid/starch compatibilized blend material, by adding a small amount of diphenylmethane-4,4-diisoate as a compatibilizer, using twin-screw to plasticize the blend material, Composite materials are prepared by kneading, uniformly mixing and completing chemical reactions. This method improves the degradation p

Method used

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  • Biodegradable composite material and preparation method thereof
  • Biodegradable composite material and preparation method thereof

Examples

Experimental program
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Embodiment 1-9

[0029] (1) Take the formula components of each weight part by the proportioning in Table 1.

[0030] Table 1

[0031]

[0032]

[0033] (2) Dry polylactic acid, biodegradable polyester, and organically modified montmorillonite in vacuum for 6-12 hours at a temperature of 60-90° C. to remove moisture.

[0034] (3) Add the dried polylactic acid, the dried biodegradable polyester, the dried organically modified montmorillonite, plasticizer and antioxidant to a high-speed mixer and blend for 5-10 minutes, and then The mixture is fed into a twin-screw extruder for melt blending and extrusion, and the extrusion temperature is 160-210°C;

[0035] Among them, Example 1 was blended for 5 minutes and the extrusion temperature was 160°C; Example 2 was blended for 8 minutes and the extrusion temperature was 170°C; Example 3 was blended for 7 minutes and the extrusion temperature was 180°C; Example 4 was blended for 6 minutes and extruded The temperature is 190°C; Example 5 is blen...

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Abstract

The invention belongs to the technical field of high polymer materials, and discloses a biodegradable composite material and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 50-80 parts of polylactic acid, 10-30 parts of biodegradable polyester, 1-15 parts of organic modified montmorillonite, 0-5 parts of plasticizer and 0.1-1 part of antioxidant. The preparation method comprises the following steps: weighing 50-80 parts of dried polylactic acid, 10-30 parts of dried biodegradable polyester, 1-15 parts of dried organic modified montmorillonite, 0-5 parts of plasticizer and 0.1-1 part of antioxidant; adding into a high-speed mixer, and blending for 5-10 minutes; and feeding the mixture into a double-screw extruder, performing melt blending and extrusion, performing bar drawing, cooling in water, granulating, and drying to obtain the degradable composite material. The invention can improve the heat resistance of the material, overcome the defects of pure polylactic acid such as low material strength and low toughness, improve the mechanical properties and widen the application area of the material.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a biodegradable composite material and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is a polymer material that is chemically synthesized after fermenting lactic acid from biological resources such as corn. After being discarded, it can be completely decomposed into water and carbon dioxide under the action of microorganisms, water, acid, alkali, etc., which is a typical Fully biodegradable plastic without polluting the environment. Due to its good processability and excellent biocompatibility, it is considered to be the most potential biodegradable polymer material. Polylactic acid has good mechanical properties, thermoplasticity, fibrillation and biodegradability, and is easy to process, so it can replace ordinary plastics. At present, polylactic acid is rarely used as a product for practical application, mainly because its own defe...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L69/00C08K9/04C08K3/34B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92561B29C2948/92704B29C2948/92895B29C2948/92923
Inventor 严莉莉
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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