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Preparation method of wood-based-graphene conductive composite material

A conductive composite material and composite material technology, applied in the field of preparation of wood-based-graphene conductive composite materials, can solve the problems of easy deformation, weakening wood moisture absorption, etc., and achieve the effects of weakening moisture absorption, improving mechanical properties, and expanding application fields

Active Publication Date: 2020-05-05
INNER MONGOLIA AGRICULTURAL UNIVERSITY +1
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  • Abstract
  • Description
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Problems solved by technology

[0013] In order to solve the above-mentioned technical problems, the present invention provides a preparation method of wood-based-graphene conductive composite material. The method uses graphene derivatives——graphene oxide, which is uniformly and organically combined with wood, and then reduced by green heat The method makes it release graphene with conductive properties inside the wood body. The wood-based-graphene conductive composite material obtained by the preparation method is uniform as a whole, and there are no shortcomings such as electromagnetic signal leakage, coating shedding, and environmental pollution. The material is a composite material that not only has electrical conductivity, but also weakens the moisture absorption and deformation of wood, and improves the mechanical properties of wood.

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  • Preparation method of wood-based-graphene conductive composite material

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Embodiment 1

[0050] The present embodiment provides a wood-based-graphene conductive composite material, which is prepared through the following steps:

[0051] (1) Wood pretreatment and extraction process: Use 95°C deionized water to boil the wood (poplar material) for 2 hours, then freeze it for 2 days, then steam the composite material for 2 hours, and then freeze it for 2 days. Then boil it with deionized water, repeat the above process several times until the color of the liquid after deionized water is clear and transparent, and finally dry it (dry at 103°C for 30 minutes, dry at 80°C for 4 hours, dry at 60°C under a vacuum of 0.2MPa Dry 2h).

[0052] (2) impregnate the graphene oxide dispersion liquid with a concentration of 3mg / mL into the fast-growing material body pretreated in step (1) under vacuum conditions, adopt a pulsed vacuum method, the vacuum degree is 0.8MPa, and vacuum impregnate for 10 minutes , normal pressure impregnation for 3 minutes, and then vacuum impregnation...

Embodiment 2

[0059] The present embodiment provides a wood-based-graphene conductive composite material, which is prepared through the following steps:

[0060] (1) Wood pretreatment and extraction process: use 95°C deionized water to boil the wood (poplar material) for 2 hours, then perform a one-week saturated water treatment and freeze for 2 days, and then steam the composite material Treated for 2 hours, then frozen for 2 days, then boiled with deionized water, repeated the above process until the color of the liquid after deionized water was boiled was clear and transparent, and finally dried (dried at 103°C for 30 minutes, dried at 80°C for 4h, in Dry at 60°C for 2h under a vacuum of 0.2MPa).

[0061] (2) impregnate the graphene oxide dispersion liquid with a concentration of 3mg / mL into the fast-growing material body pretreated in step (1) under vacuum conditions, adopt a pulsed vacuum method, the vacuum degree is 0.8MPa, and vacuum impregnate for 10 minutes , normal pressure impre...

Embodiment 3

[0065] The present embodiment provides a wood-based-graphene conductive composite material, which is prepared through the following steps:

[0066] (1) Wood pretreatment and extraction process: use 95°C deionized water to boil the wood (poplar material) for 2 hours, then perform a one-week saturated water treatment and freeze for 2 days, and then steam the composite material Treated for 2 hours, then frozen for 2 days, then boiled with deionized water, repeated the above process until the color of the liquid after deionized water was boiled was clear and transparent, and finally dried (dried at 103°C for 30 minutes, dried at 80°C for 4h, in Dry at 60°C for 2h under a vacuum of 0.2MPa).

[0067] (2) impregnate the graphene oxide dispersion liquid with a concentration of 3mg / mL into the fast-growing material body pretreated in step (1) under vacuum conditions, adopt a pulsed vacuum method, the vacuum degree is 0.8MPa, and vacuum impregnate for 10 minutes , normal pressure impre...

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Abstract

The invention provides a preparation method of a wood-based-graphene conductive composite material. The method comprises the following steps: S1, circularly boiling, freezing, steaming, freezing and boiling the wood by using deionized water until a residual liquid after boiling treatment is clear and transparent, and then carrying out drying treatment; S2, dipping a graphene oxide dispersion liquid into the dried wood under a pulse type vacuum condition; S3, carrying out segmented drying on the impregnated wood to obtain a wood-based-graphene oxide composite material; and S4, carrying out a thermal reduction reaction on the wood-based-graphene oxide composite material in a protective gas atmosphere to obtain the wood-based-graphene conductive composite material. According to the method, the porosity of the wood is improved by adopting a mode of pretreating the wood through water circulation, and the graphene oxide dispersion liquid is added into a wood body by adopting a pulse type vacuum impregnation method; and finally, a green thermal reduction reaction is carried out to reduce the graphene oxide into graphene.

Description

technical field [0001] The invention belongs to the technical field of wood functional treatment, and in particular relates to a preparation method of a wood-based-graphene conductive composite material. Background technique [0002] The electromagnetic radiation brought by the rapidly developing electronics industry has disadvantages such as information leakage, serious interference with the operation of surrounding electronic equipment, and harm to human health. It has become another major public hazard after noise, air, water, and solid waste pollution. The metal resources with natural electromagnetic shielding effect are increasingly depleted, the environmental problems caused by the smelting process are becoming more and more serious, the processing is difficult, the weight of the finished product is heavy, and the strong reflection of electromagnetic waves causes secondary interference and other shortcomings, which limit its applicability. Conductive polymers, carbon-b...

Claims

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Application Information

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IPC IPC(8): B27K5/00B27K5/04B27K3/02B27K3/08B27K3/16
CPCB27K5/00B27K5/04B27K3/02B27K3/08B27K3/16
Inventor 王喜明王丽张羽王哲张晓涛李丽丽王磊黄贺东
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY
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