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Natural fiber/polylactic acid composite material and preparation method thereof

A technology of natural fibers and composite materials, applied in the field of natural fiber reinforced polylactic acid and its preparation, can solve the problems of complex operation, difficult industrialization, and high equipment requirements, achieve simple methods, improve compatibility, and enhance mechanical properties and thermal properties. Effect

Inactive Publication Date: 2014-01-15
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned inventions all have the characteristics of complicated operation, high requirements for equipment, and difficult industrialization.

Method used

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  • Natural fiber/polylactic acid composite material and preparation method thereof
  • Natural fiber/polylactic acid composite material and preparation method thereof
  • Natural fiber/polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The biodegradable natural fiber / polylactic acid composite material in this embodiment is made of components comprising the following parts by weight:

[0028]

[0029] The preparation method of the composite material of the present embodiment is as follows:

[0030] Weigh the components of each part by weight according to the above proportion, and dry the polylactic acid, hemp fiber and montmorillonite at a drying temperature of 80°C and a drying time of 10 hours; Blending in a feeder for 10 minutes, and then melt blending and extruding the mixture through a twin-screw extruder at an extrusion temperature of 180° C. to obtain natural fiber / polylactic acid composite material particles. Sample preparation and performance testing were carried out in accordance with the requirements of ASTM D638, D790 and D1525. The test results are shown in Table 1.

Embodiment 2

[0032] The biodegradable natural fiber / polylactic acid composite material in this embodiment is made of components comprising the following parts by weight:

[0033]

[0034]

[0035] The preparation method of the composite material of the present embodiment is as follows:

[0036] Weigh the components of each part by weight according to the above proportion, and dry the polylactic acid, jute fiber and talcum powder at a drying temperature of 60°C and a drying time of 12 hours; mix the dried raw materials according to the above ratio In-machine blending for 6 minutes, and then melt blending and extruding the mixture through a twin-screw extruder at an extrusion temperature of 200° C. to obtain natural fiber / polylactic acid composite material particles. Sample preparation and performance testing were carried out in accordance with the requirements of ASTM D638, D790 and D1525. The test results are shown in Table 1.

Embodiment 3

[0038] The biodegradable natural fiber / polylactic acid composite material in this embodiment is made of components comprising the following parts by weight:

[0039]

[0040] The preparation method of the composite material of the present embodiment is as follows:

[0041] Weigh the components in parts by weight according to the above ratio, and dry the polylactic acid, sisal fiber and kaolin at a drying temperature of 70°C and a drying time of 8 hours; mix the dried raw materials according to the above ratio The mixture was blended in the machine for 5 minutes, and then the mixture was melt-blended and extruded through a twin-screw extruder at an extrusion temperature of 190° C. to obtain natural fiber / polylactic acid composite material particles. Sample preparation and performance testing were carried out in accordance with the requirements of ASTM D638, D790 and D1525. The test results are shown in Table 1.

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Abstract

The invention relates to a natural fiber / polylactic acid composite material and a preparation method thereof. The natural fiber / polylactic acid composite material is prepared from the following components in parts by weight: 70 to 95 parts of polylactic acid, 5 to 30 parts of natural fiber, 0 to 5 parts of coupling agent, 0 to 2 parts of antioxidant and 1 to 5 parts of nucleating agent. The preparation method comprises the following steps: vacuum-drying the polylactic acid, the natural fibers and the nucleating agent at 60 to 100 DEG C for 6 to 12 hours, and removing moisture; weighing the components in parts by weight in proportion, blending all the raw materials in a blender for 5-10 minutes, extruding a mixture out of a twin-screw extruder at 160 to 200 DEG C, and performing cooling, grain-sized dicing and drying to obtain the natural fiber / polylactic acid composite material. Compared with the prior art, the natural fiber / polylactic acid composite material and the preparation method thereof have the advantages that the method is simple; the process is easy to implement; the composite material is high in performance, and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a natural fiber reinforced polylactic acid and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is an environmentally friendly polyester polymer material derived from renewable resources with good biodegradability and biocompatibility. At the same time, it is non-toxic and harmless to the human body, gradually degrades in the body and in the natural environment, and finally becomes carbon dioxide and water, leaving no environmental problems. PLA has good strength and rigidity, but poor flexibility and impact performance, high cost, and the crystallization speed of pure polylactic acid is slow, and the molding cycle is long when used as injection molded parts, so it is difficult to meet some application requirements. In recent years, the research on the modification of polylactic acid has become a hot spot. Combining low-cos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08K13/02C08K5/134C08K3/34
Inventor 严莉莉
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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