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Preparation method of environment-friendly wood-plastic composite material

A technology of wood-plastic composite materials and environmental protection, which is applied in the field of wood-plastic composite materials, can solve the problems of undiscovered environmentally friendly wood-plastic composite materials, achieve good market prospects, eliminate pollution, and purify the environment.

Active Publication Date: 2013-07-24
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No method of using waste CCA preservative wood to prepare environmentally friendly wood-plastic composites has been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1 After the waste CCA preservative wood is crushed, put it into a pulverizer and grind it into wood fiber, put the wood fiber into a filter paper bag, and put it into a flask containing an aqueous solution of sodium hypochlorite. The aqueous solution of sodium hypochlorite contains 8% chlorine and pH=7.1 . Put the flask into a rotary shaker, shake it for 0.5-1 hour at a speed of 200 rpm / min and a temperature of 25°C, and then heat it to 40°C for extraction at a constant temperature for 3-4 hours.

[0026] 2 After taking out the filter bag, rinse the filter bag with deionized water to remove chromium, arsenic and copper residual extracts on the surface of the filter bag and wood fiber, and take out the wood fiber after natural drying. The 30-mesh particles were processed by sieving, and dried for 24 hours in an oven at a temperature of 105°C to reduce the average moisture content of wood fibers to less than 3%; the contents of chromium, arsenic, and copper in wood fiber...

Embodiment 2

[0031] 1. After the waste CCA preservative wood is crushed, put it into a pulverizer and grind it into wood fiber. After putting the wood fiber into a filter paper bag, put it into a flask containing an aqueous solution of sodium hypochlorite. The aqueous solution of sodium hypochlorite contains 8% chlorine, and the pH= 8. Put the flask into a rotary shaker, shake at a speed of 200rpm / min, and a temperature of 30°C for 0.5-1 hour, then heat to 40°C and extract at a constant temperature for 3-4 hours.

[0032] 2. After taking out the filter bag, rinse it with deionized water, and take it out after natural drying. After the 100-mesh particles were treated by sieving, they were dried in an oven at 105°C for 24 hours to reduce the average moisture content of wood fibers to less than 3%. After testing, the contents of chromium, arsenic and copper in wood fibers were respectively 0.31 mg / g, 0.25 mg / g, 0.08 mg / g, while collecting the flushing fluid and extracting fluid for non-toxic...

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Abstract

The invention discloses a preparation method of an environment-friendly wood-plastic composite material. The preparation method is characterized by crushing the waste preservative wood treated with a preservative and grinding the crushed waste preservative wood into powdery wood fibers, immersing the powdery wood fibers into a sodium hypochlorite solution to be oscillated at 20-30 DEG C for 0.5-1 hour, then heating the solution to 40 DEG C, and carrying out extraction for 3-4 hours; and then, drying the wood fibers and then mixing the dried wood fibers with thermoplastic materials and maleic anhydride grafted polypropylene according to a certain weight ratio, and carrying out extrusion forming on the mixture to prepare a wood-plastic floor. The preparation method has the beneficial effects that the waste preservative wood is utilized to prepare the wood-plastic composite material, and the waste CCA (copper chrome arsenate) preservative wood is fully utilized to produce outdoor garden landscape and building materials, so that not only can the wood resources be protected but also pollution can be eliminated and the environment can be purified; therefore, the preparation method has important significance for developing the economies in various regions, saving plenty of wood and implementing the strategy of sustainable development; and the boards prepared by the method have better and stronger color stability, corrosion resistance and mechanical properties, and are better than most wood-plastic composite materials in the market.

Description

technical field [0001] The invention relates to a wood-plastic composite material, in particular to a preparation method of an environment-friendly wood-plastic composite material. Background technique [0002] When wood is used outdoors, it usually needs anti-corrosion treatment to improve decay resistance and insect resistance, and its service life can be increased by at least 5 times. CCA (chromium copper arsenate) is a water-soluble composite preservative, which has been widely used in anticorrosive wood treatment at home and abroad because of its colorless, odorless, easy to paint the treated wood, and relatively low cost. In my country, about 100,000 m 3 Among agricultural materials, building materials, and garden materials, CCA-treated wood accounts for about 90%, while other preservative-treated materials only account for about 10%. In addition, in recent years, my country's import of CCA anti-corrosion wood has also increased significantly. Every year, anti-corros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L23/06C08L51/06
Inventor 郭勇陈玉霞刘盛全高慧赵冠艳李晶晶
Owner ANHUI AGRICULTURAL UNIVERSITY