Preparation method of graphene PLA wood-plastic composite

A wood-plastic composite material and graphene technology, applied in the field of PLA composite materials, can solve the problems of wood-plastic composite materials and poor mechanical properties of composite materials that have not yet been seen, and achieve non-toxic reaction products, easy reactions, and improved degradability. Effect

Inactive Publication Date: 2019-06-14
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At this stage, wood-plastic composite materials increase the amount of wood fiber added in order to speed up the degradation time, and the mechanical properties of composite materials are poor.
However, there are no relevant reports on wood-plastic composites made of graphene-added eucalyptus powder and polylactic acid as the main raw materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 6g of dry wood powder and add it to 100ml of acetone, 0.03g of silane coupling agent KH550, and 0.03g of plasticizer DEHP solution, and heat in a water bath at 60°C for 30min. After the reaction, it was placed in a fume hood to air dry for 1 h. Place in a blast drying oven at 80°C for 12 hours until the wood powder is completely dry. The soaked and dried wood powder was mixed with 3g of graphene powder and 51g of PLA powder in a high-speed mixing mixer for 30min. Put the uniformly mixed powder into a flat vulcanizer, set the temperature, pressure and time to 160°C, 13MPa and 10min for heating and molding. That is, the wood-plastic composite material is obtained. The obtained material had a tensile strength of 18 MPa, a bending strength of 31 MPa, and a water absorption rate of 0.8%.

Embodiment 2

[0026] Take 6g of dry wood powder and add it to 100ml of acetone, 0.0018g of silane coupling agent KH560, and 0.009g of maleic anhydride solution, and heat in a water bath at 60°C for 30min. After the reaction, it was placed in a fume hood to air dry for 1 h. Place in a blast drying oven at 80°C for 12 hours until the wood powder is completely dry. The soaked and dried wood powder was mixed with 6g of graphene powder and 48g of PLA powder in a high-speed mixing mixer for 30min. Put the uniformly mixed powder into a flat vulcanizer, set the temperature, pressure and time to 160°C, 13MPa and 10min for heating and molding. That is, the wood-plastic composite material is obtained. The obtained material had a tensile strength of 16 MPa, a bending strength of 31 MPa, and a water absorption rate of 0.8%.

Embodiment 3

[0028] Take 12g of dry wood powder and add it to 100ml of acetone, 0.06g of silane coupling agent KH570, and 3g of organic montmorillonite suspension, and heat in a water bath at 60°C for 30min. After the reaction, it was placed in a fume hood to air dry for 1 h. Place in a blast drying oven at 80°C for 12 hours until the wood powder is completely dry. The soaked and dried wood powder was mixed with 3g of graphene powder and 54g of PLA powder in a high-speed mixing mixer for 30min. Put the uniformly mixed powder into a flat vulcanizer, set the temperature, pressure and time to 160°C, 13MPa and 10min for heating and molding. That is, the wood-plastic composite material is obtained. The obtained material had a tensile strength of 18 MPa, a bending strength of 30 MPa, and a water absorption rate of 0.8%.

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Abstract

The invention discloses a preparation method of a graphene PLA wood-plastic composite. The preparation method comprises the steps that gum wood is cut and crushed, crushed gum wood powder is filteredthrough a sieve of 60-100 meshes to remove larger impurities in the gum wood powder, pure gum wood fine powder is obtained, the obtained gum wood fine powder is placed in an air-blowing drying box forair-blowing drying until the mass is constant and an absolute dry state is reached, the absolute dry wood powder is added into a solution of mixing acetone, a silane coupling agent and the like, heating and infiltration are conducted, after a reaction is completed, drying is conducted until the wood powder is in the absolute dry state, the infiltrated and dried wood powder and graphene powder aremixed and stirred at the high speed, the evenly-mixed powder is subjected to heating forming, and thus the wood-plastic composite is obtained. The preparation method of the graphene PLA wood-plasticcomposite has the advantages that operation is easy and safe, reaction is easy, the efficiency is high, energy consumption is low, environmental protection and low pollution are achieved, and performance is improved obviously, and further has the advantages that the application range is wide, the amount of an adopted agent is less, the reaction speed is high, reaction products are non-toxic, and stimulation to a human body is avoided.

Description

technical field [0001] The invention belongs to the technical field of PLA composite materials, and in particular relates to a preparation method of graphene PLA wood-plastic composite materials. Background technique [0002] Wood-plastic composite material, referred to as WPC, is made of wood fiber (such as wood powder, straw powder, etc.) in a certain proportion after a certain pretreatment, so that it is fully mixed with polymer resin or other materials and combined with each other. A new type of material, wood-plastic composite material, has emerged in recent years, which can make full use of some resources to a greater extent, reduce the waste of resources, and greatly reduce the pollution and pollution caused by waste plastics and furniture. Destroying the environment and other serious problems, it has the reputation of "synthetic wood" and has very broad prospects in various fields. [0003] At this stage, wood-plastic composite materials increase the amount of wood ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/02C08K5/544C08K3/04C08K5/5435C08K5/5425C08K5/549
Inventor 黄丽婕安书香赵含宇徐豪李春颖黄崇杏王双飞
Owner GUANGXI UNIV
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