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Biodegradable polylactic acid composite as well as preparation method and application thereof

A composite material and biodegradable technology, applied in the field of polylactic acid composite materials, can solve the problems that hinder the application range of polylactic acid and agricultural waste composite materials, poor impact resistance, etc., and achieve the effect of simple processing, low cost and good hand feeling

Active Publication Date: 2017-09-29
ZHONGSHAN SHANGYANG PRECISION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of PLA and agricultural waste composites such as hard and brittle properties and poor impact resistance, the application range of PLA and agricultural waste composites has been hindered.

Method used

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  • Biodegradable polylactic acid composite as well as preparation method and application thereof
  • Biodegradable polylactic acid composite as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A biodegradable polylactic acid composite material, comprising the following raw materials by weight percentage:

[0039] Polylactic acid 50%,

[0040] Wheat Straw 20%,

[0041] Nano Calcium Carbonate 30%.

[0042] The preparation method of above-mentioned biodegradable polylactic acid composite material, comprises the steps:

[0043] (1) Cleaning the wheat straw, removing silt and rot, drying and pulverizing, and passing the obtained powder through a 60-mesh sieve, and then drying in a dryer until the moisture content is 1%-3%;

[0044] (2) drying the wheat straw and polylactic acid treated in step (1) at 80-90° C. for 3-4 hours, and controlling the humidity below 250 ppm to obtain a mixture;

[0045] (3) Extrude and granulate the mixture obtained through step (2) and nano-calcium carbonate in a twin-screw extruder, wherein the extrusion temperature is 175-200°C, the screw speed is 300r / min, and the length of the screw The diameter ratio is 40:1, forming granular s...

Embodiment 2

[0049] A biodegradable polylactic acid composite material, comprising the following raw materials by weight percentage:

[0050] Polylactic acid 60%,

[0051] Corn stover 15%,

[0052] Nano Calcium Carbonate 25%.

[0053] The preparation method of above-mentioned biodegradable polylactic acid composite material, comprises the steps:

[0054] (1) Clean up the corn stalks, remove the silt and rot, dry them and pulverize them, pass the obtained powder through a 60-mesh sieve, and then put them into a dryer to dry until the moisture content is 1%-3%;

[0055] (2) drying the corn stalks and polylactic acid treated in step (1) at 80-90° C. for 3-4 hours, and controlling the humidity below 250 ppm to obtain a mixture;

[0056] (3) Extrude and granulate the mixture obtained through step (2) and nano-calcium carbonate in a twin-screw extruder, wherein the extrusion temperature is 175-200°C, the screw speed is 300r / min, and the length of the screw The diameter ratio is 40:1, forming...

Embodiment 3

[0059] A biodegradable polylactic acid composite material, comprising the following raw materials by weight percentage:

[0060] Polylactic acid 40%,

[0061] Rice Bran 30%,

[0062]Nano Calcium Carbonate 30%.

[0063] The preparation method of above-mentioned biodegradable polylactic acid composite material, comprises the steps:

[0064] (1) Cleaning the rice bran, removing silt and rot, drying and pulverizing, passing the obtained powder through a 60-mesh sieve, and then putting it into a dryer to dry until the moisture content is 1%-3%;

[0065] (2) drying the rice bran and polylactic acid treated in step (1) at 80-90° C. for 3-4 hours, and controlling the humidity below 250 ppm to obtain a mixture;

[0066] (3) Extrude and granulate the mixture obtained through step (2) and nano-calcium carbonate in a twin-screw extruder, wherein the extrusion temperature is 175-200°C, the screw speed is 400r / min, and the length of the screw The diameter ratio is 50:1, forming granular...

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Abstract

The invention discloses a biodegradable polylactic acid composite as well as a preparation method and application thereof. The polylactic acid composite is prepared from the following raw materials in percentage by weight: 40-60% of polylactic acid, 15-30% of agricultural waste and 25-30% of calcium carbonate, wherein nano calcium carbonate effectively solves crisp and soft characteristics of a polylactic acid and agricultural waste composite, engineering plastics and traditional materials can be completely replaced, the sustainable development of resources is realized, and a cosmetic brush handle prepared from the polylactic acid composite disclosed by the invention has the characteristics of easiness in degradation, high strength, good hand feeling and no deformation.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a biodegradable polylactic acid composite material, its preparation method and application. Background technique [0002] The handles of cosmetic brushes currently on the market are usually made of wood, bamboo, engineering plastics and metal. However, although wood and bamboo are easy to degrade, due to their long growth cycle and large total demand, they are likely to cause irreversible damage to the ecological environment; engineering plastics and metal materials have a long degradation cycle and are difficult to recycle and reuse, which is not conducive to social sustainability. sexual development. In such cases, alternative biodegradable materials must be found. [0003] Polylactic acid is a polymer material that can be polymerized from lactic acid fermented from crops. Therefore, polylactic acid is an environmentally friendly polymer material. At the sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08K3/26
CPCC08K2003/265C08K2201/003C08K2201/011C08L67/04C08L2201/06C08L2201/08C08L97/02C08K3/26
Inventor 魏志军陈志强陈经尚王春波张洁梅张晓虹蔡颜娟
Owner ZHONGSHAN SHANGYANG PRECISION IND
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