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Polylactic acid composite material

A composite material and polylactic acid technology, applied in the field of preparation of polylactic acid composite materials, can solve the problems of poor toughness and high brittleness of polylactic acid materials, and achieve the effects of improving compatibility, toughness and workability

Inactive Publication Date: 2016-03-30
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a polylactic acid composite material with excellent strength and toughness in order to overcome the defects of high brittleness and poor toughness of polylactic acid materials

Method used

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  • Polylactic acid composite material

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Effect test

specific Embodiment 1

[0030] A kind of polylactic acid composite material, comprises the combination of following material and consumption:

[0031] Polylactic acid: 100 parts

[0032] Polylactic acid grafted glycidyl methacrylate: 24 parts

[0033] Starch grafted polylactic acid: 22 parts

[0034] Acetate nanocellulose: 13 parts

[0035] Cellulose acetate propionate: 12 parts

[0036] Antioxidant: 2.5 parts

[0037] It is also characterized in that it is prepared by the following process, and the process is:

[0038] A: Vacuum dry all raw materials at 60 degrees for 5 hours, and set aside;

[0039] B: Disperse cellulose acetate nanocellulose and cellulose acetate propionate in a mixed solution of ethanol and water with a mass ratio of 1:3, and then blend them in a high-speed blender at 50 degrees for 10 minutes at a speed of The temperature is 50rad / min, and then put into the extruder to melt and extrude, the temperature is 180-200 degrees, the extrusion time is 2 minutes, the speed is 80rad...

specific Embodiment 2

[0049] A kind of polylactic acid composite material, comprises the combination of following material and consumption:

[0050] Polylactic acid: 100 parts

[0051] Polylactic acid grafted glycidyl methacrylate: 32 parts

[0052] Starch grafted polylactic acid: 26 parts

[0053] Acetate nanocellulose: 10 parts

[0054] Cellulose acetate propionate: 15 parts

[0055] Antioxidant: 3 parts

[0056] It is also characterized in that it is prepared by the following process, and the process is:

[0057] A: Vacuum dry all raw materials at 60 degrees for 5 hours, and set aside;

[0058] B: Disperse acetic acidified nanocellulose and cellulose acetate propionate in a mixed solution of ethanol and water with a mass ratio of 1:3, and then blend them in a high-speed blender at 50 degrees for 10 minutes. The temperature is 50rad / min, and then put into the extruder to melt and extrude, the temperature is 180-200 degrees, the extrusion time is 2 minutes, the speed is 80rad / min, extrude an...

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Abstract

The present invention relates to a polylactic acid composite material. The composite material is compounded and prepared by using polylactic acid, polylactic acid grafted glycidyl methacrylate, starch grafted polylactic acid, acetate esterified nano cellulose, acetate propionate cellulose and an antioxidant through melting extrusion in two steps. According to the composite material disclosed by the present invention, the preparation process is simple, the composite material has excellent strength and toughness due to excellent compatibility between each component, so that the composite material can be widely used in the environment protection packaging and industrial fields with the requirements of high strength and high toughness.

Description

technical field [0001] The invention relates to a preparation method of a polylactic acid composite material, in particular to a preparation method of a high-strength and high-toughness polylactic acid composite material. Background technique [0002] Although plastic materials have excellent performance and wide applicability, they are derived from petroleum products and cannot be degraded. In today's resource crisis and environmental pollution are becoming more and more serious, looking for excellent performance and renewable alternative materials has become the current research field in the field of materials. top priority. [0003] Among the current degradable materials, starch has been deeply studied due to its cheap price and wide range of sources, and a variety of daily and industrial products have been prepared through modification and compounding, such as starch-based films, starch tableware, etc. However, starch has its natural defects. Its mechanical properties...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L51/08C08L87/00C08L1/12C08L1/14
Inventor 陈一
Owner HUNAN UNIV OF TECH
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