A kind of nano-copper oxide in-situ reduction wood composite material and preparation method thereof

A technology of nano-copper oxide and composite materials, which is applied in wood treatment, wood impregnation, impregnated wood, etc., can solve the problems of no texture and natural color, weather resistance needs to be improved, and insufficient hydrophobic function, so as to reduce hydrophilicity and facilitate Practical operation, warm texture effect

Active Publication Date: 2021-03-02
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, as a typical representative of biomass engineering materials, wood-based panels still have environmental protection problems when used as furniture / building materials. They do not have the beautiful texture and natural color of natural wood, and their weather resistance needs to be improved; when used as mechanical engineering materials, their mechanical properties are low. Insufficient hydrophobic function, poor heat resistance, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]An in-situ reduction of nano-copper oxide wood composite material. The components in mass percentage are: 40% pennisetum powder, 30% wheat straw coarse powder, 17% reed fiber, 10% nano-copper oxide powder, and polyethylene 2 Alcohol -400 3%.

[0033]A method for preparing nano-copper oxide in situ reduction of wood composite material includes the following steps:

[0034]Step 1: Take pennisetum, dry it, dry it, chopped it, and then use a straw pulverizer, bran grinder, flour grinder to make it through coarse crushing, fine crushing, coarse grinding, fine grinding, and sieving. Make it into a micronized powder with a particle size of 45µm and a moisture content of 12%;

[0035]Step 2: Preparation of wheat straw meal: take sun-dried and mildew-free wheat straw, first soak the wheat straw in 3% NaOH solution at 40℃ for 15h, rinse and dry, make half of the wheat straw The cellulose content is reduced by 20%, and the wheat straw coarse powder is made through the process of crushing, finely ...

Embodiment 2

[0045]An in-situ reduction of nano-copper oxide wood composite material. The components in mass percentages are: 47.5% pennisetum powder, 20% wheat straw coarse powder, 20% reed fiber, 12% nano-copper oxide powder, and polyethylene 2 Alcohol-400 0.5%.

[0046]A method for preparing nano-copper oxide in situ reduction of wood composite material includes the following steps:

[0047]Step 1: Preparation of Pennisetum Micropowder: Take the Pennisetum to remove impurities, sun-dry, chop and then dry, and then use a straw pulverizer, bran grinder, flour grinder to coarsely crush, finely crush, and coarsely grind. Fine grinding and sieving process are made into micro powder, so that the particle size of the micro powder is 75 µm and the moisture content is 15%;

[0048]Step 2: Preparation of wheat straw meal: take sun-dried and mildew-free wheat straw, first soak the wheat straw in a 5% NaOH solution at 60°C for 24 hours, rinse and dry it to make half of the wheat straw The cellulose content is red...

Embodiment 3

[0058]An in-situ reduction of nano-copper oxide wood composite material. The components in mass percentage are: 50% pennisetum powder, 23% wheat straw coarse powder, 10% reed fiber, 15% nano-copper oxide powder, and polyethylene 2 Alcohol-400 2%.

[0059]A method for preparing nano-copper oxide in situ reduction of wood composite material includes the following steps:

[0060]Step 1: Preparation of Pennisetum Micropowder: Take the Pennisetum to remove impurities, sun-dry, chop and then dry, and then use a straw pulverizer, bran grinder, flour grinder to coarsely crush, finely crush, and coarsely grind. Fine grinding and sieving process are made into fine powder, so that the particle size of the fine powder is 65 µm and the moisture content is 13%;

[0061]Step 2: Preparation of wheat straw meal: take sun-dried and mildew-free wheat straw, first soak the wheat straw in 4% NaOH solution at 50℃ for 20h, rinse and dry, make half of the wheat straw The cellulose content is reduced by 25% and the ...

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Abstract

The invention discloses a nano-copper oxide in-situ reduction wood composite material and a preparation method thereof. A nano-copper oxide in-situ reduction wood composite material is made of five components, and the components are: Pennisetum micropowder 40%-50%, wheat straw coarse powder 20%-30%, reed fiber 10%~20%, nano-copper oxide powder 10%~15%, polyethylene glycol-400 0.5%~3%. The preparation method comprises eight steps of preparation of Pennisetum micropowder, preparation of wheat straw coarse powder, preparation of reed fiber, batching, preparation of wood alloy powder, material mixing, hot molding and cryogenic treatment. The preparation method comprehensively applies powder metallurgy and powder engineering, composite materials and engineering, wood science and technology and other interdisciplinary material forming theories, and innovates the forming technology and method of wood composite materials.

Description

Technical field[0001]The invention belongs to the field of new materials, and particularly relates to a nano-copper oxide in-situ reduction wood composite material and a preparation method thereof.Background technique[0002]From the adoption of the Framework Convention on Climate Change at the 1st United Nations Conference on Environment and Development in Rio de Janeiro, Brazil in 1992, to the adoption of the Paris Agreement at the 21st Global Climate Conference in Paris, France in 2015, the arrangements for global response to climate change after 2020 were made. By the 2016 G20 summit in Hangzhou, China, China and the United States ratified the "Paris Agreement", while "building an innovative, dynamic, interconnected, and inclusive world economy", it has left endless thinking and heavy burdens for resource, environment and material science and technology workers. On the one hand, mankind’s exploitation and plunder of forests, oil and mineral resources have reached a frantic point; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27J1/00B27K3/20B27K3/50B27L11/06B27L11/08B27N3/02B27N3/08B27N1/00B27K5/00B27K9/00B27K3/36B27M1/06
CPCB27J1/00B27K3/20B27K3/36B27K3/50B27K5/0005B27K9/00B27K9/005B27K9/007B27K2200/10B27L11/06B27L11/08B27M1/06B27N1/00B27N3/02B27N3/08
Inventor 吴庆定刘俊怀袁建李佩何玉琴刘克非张红
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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