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Composite material of wood flour-modified polylactic acid and preparation method of composite material

A composite material, polylactic acid technology, applied in the field of packaging materials, to achieve the effect of improving poor compatibility, performance improvement, and wide application prospects

Inactive Publication Date: 2017-09-29
苏州奥宇包装科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although polylactic acid is easy to process and has high hardness, polylactic acid is very brittle, so in practical applications, it is necessary to modify polylactic acid or add other substances to form composite materials to overcome these shortcomings of polylactic acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A composite material of wood powder modified polylactic acid, the composite material comprises the following components in parts by weight: 11 parts of poplar wood powder, 8 parts of willow wood powder, 7 parts of pagoda wood powder, 5 parts of maleic anhydride parts, 5 parts of ethylene glycol, 3 parts of L-lactide monomer, 4 parts of silane coupling agent, 8 parts of carbon nanotubes, and 23 parts of polylactic acid.

[0021] The preparation method of the composite material of described a kind of wood powder modified polylactic acid, comprises the following steps:

[0022] (1) Process poplar wood powder, willow wood powder and pagoda tree wood powder with a mass fraction of 15% sodium carbonate aqueous solution, and react for 1.5 hours;

[0023] (2) Place the fiber treated in step (1) in an oven to dry, and pulverize the fiber, then place it in a vacuum drying oven and dry it for 1 hour to obtain fiber powder, wherein the vacuum degree is -0.4Pa, and the temperature i...

Embodiment 2

[0028] A composite material of wood powder modified polylactic acid, the composite material comprises the following components in parts by weight: 22 parts of poplar wood powder, 14 parts of willow wood powder, 13 parts of pagoda wood powder, 14 parts of maleic anhydride parts, 9 parts of ethylene glycol, 8 parts of L-lactide monomer, 8 parts of silane coupling agent, 13 parts of carbon nanotubes, and 43 parts of polylactic acid.

[0029] The preparation method of the composite material of described a kind of wood powder modified polylactic acid, comprises the following steps:

[0030] (1) Process poplar wood powder, willow wood powder and pagoda tree wood powder with a mass fraction of 23% sodium carbonate aqueous solution, and react for 3.5 hours;

[0031] (2) Place the fiber treated in step (1) in an oven to dry, and pulverize the fiber, and then dry it in a vacuum oven for 2 hours to obtain a fiber powder, wherein the vacuum degree is -0.2Pa, and the temperature is 79 ℃; ...

Embodiment 3

[0036] A composite material of wood powder modified polylactic acid, the composite material comprises the following components in parts by weight: 26 parts of poplar wood powder, 19 parts of willow wood powder, 17 parts of pagoda wood powder, 17 parts of maleic anhydride parts, 12 parts of ethylene glycol, 12 parts of L-lactide monomer, 11 parts of silane coupling agent, 19 parts of carbon nanotubes, and 50 parts of polylactic acid.

[0037] The preparation method of the composite material of described a kind of wood powder modified polylactic acid, comprises the following steps:

[0038] (1) Process poplar wood powder, willow wood powder and pagoda tree wood powder with a mass fraction of 28% sodium carbonate aqueous solution, and react for 4 hours;

[0039] (2) Place the fiber treated in step (1) in an oven to dry, and pulverize the fiber, and then dry it in a vacuum oven for 3 hours to obtain a fiber powder, wherein the vacuum degree is -0.1Pa, and the temperature is 85 ℃;...

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PUM

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Abstract

The invention discloses a composite material of wood flour-modified polylactic acid and a preparation method of the composite material. The composite material is prepared from the following components in parts by weight: 11-26 parts of poplar wood flour, 8-19 parts of willow wood flour, 7-17 parts of locust wood flour, 5-17 parts of maleic anhydride, 5-12 parts of ethylene glycol, 3-12 parts of an L-lactide monomer, 4-11 parts of a silane coupling agent, 8-10 parts of a carbon nano tube and 23-50 parts of polylactic acid. The composite material of the wood flour-modified polylactic acid has the advantages that (1) the composite material is an environment-friendly material and has a wide application prospect; (2) the defect of large brittleness of the polylactic acid is improved and the performance is improved; and (3) the problem of poor compatibility of the wood flour and the polylactic acid is solved.

Description

technical field [0001] The invention belongs to the field of packaging materials, and relates to a polylactic acid packaging material, in particular to a composite material of wood powder modified polylactic acid and a preparation method thereof. Background technique [0002] Because polylactic acid is renewable, and polylactic acid is easy to process and shape, it can be produced with some renewable resources of cornstarch in nature, so in modern society, people have begun to gradually use polylactic acid to replace polyethylene, polyvinyl chloride, etc. Some petroleum-based plastic products. At the same time, polylactic acid also has the same shortcomings as other plastics, and we also need to solve them in production practice. Among them, some shortcomings of polylactic acid itself can be solved by filling wood fibers in the polylactic acid matrix. The mechanical properties of the composite can be improved by first adding wood flour. Secondly, compared with the commonl...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/02C08K7/24C08K5/053
CPCC08L67/04C08K2201/011C08L2205/025C08L2205/035C08L2205/16C08L97/02C08K7/24C08K5/053
Inventor 顾建芳
Owner 苏州奥宇包装科技有限公司
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