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Wood-plastic composite material and preparation method thereof

A wood-plastic composite material and raw material technology, applied in the field of new materials, can solve problems such as reducing the impact resistance mechanical properties of walls, and achieve the effects of being beneficial to product quality, reducing cell size, and low thermal expansion.

Inactive Publication Date: 2019-01-25
HUNAN ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to improve the effect of heat preservation and energy saving and reduce the amount of materials used in the production process, this wood-plastic integrated wallboard usually forms a hollow shape, which often reduces the impact resistance of the wall.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of cellulose nanofibers

[0023] Take the bamboo that has been degreened and yellowed as the raw material, dry the bamboo to a moisture content of 6%, and then crush it into 150-200 mesh bamboo powder; immerse the bamboo powder in a mixed solution of benzene / ethanol with a volume ratio of 2:1, Then extract 5h under the condition of 85 ℃, after removing the extract, obtain the bamboo powder after the extraction; The bamboo powder after the extraction is adopted chemical method under the condition of 40% benzenesulfonate aqueous solution by mass fraction To remove lignin, the mass volume ratio of bamboo powder and benzenesulfonate solution is 1:15g / mL, and then remove hemicellulose under alkaline conditions after separating lignin liquid to obtain bamboo cellulose.

[0024] Take 100g of bamboo cellulose, add 0.3g of 2,2,6,6-tetramethylpiperidinium oxide, 3g of sodium bromide, and 6.0g of sodium hypochlorite into a 1.5L aqueous solution, then stir and react ...

Embodiment 2

[0030] 1. Preparation of cellulose nanofibers

[0031] Take the bamboo that has been degreened and yellowed as raw material, dry the bamboo to a moisture content of 6%, and then crush it into 150-250 mesh bamboo powder; immerse the bamboo powder in a mixed solution of benzene / ethanol with a volume ratio of 1.5:1, Then extract under the condition of 85 ℃ for 3h, after removing the extract, obtain the bamboo powder after the extraction; adopt the bamboo powder after the extraction to adopt chemical method under the condition that the mass fraction is 20% benzenesulfonate aqueous solution condition To remove lignin, the mass volume ratio of bamboo powder and benzenesulfonate solution is 1:5g / mL, and then remove hemicellulose under alkaline conditions after separating lignin liquid to obtain bamboo cellulose.

[0032]Take 100g of bamboo cellulose, add it to 1.5L aqueous solution containing 0.6g of 2,2,6,6-tetramethylpiperidine oxide, 4.5g of sodium bromide, and 4.5g of sodium hypo...

Embodiment 3

[0038] 1. Preparation of cellulose nanofibers

[0039] Take the bamboo that has been degreened and yellowed as raw material, dry the bamboo to a moisture content of 6%, and then crush it into 200-300 mesh bamboo powder; immerse the bamboo powder in a mixed solution of benzene / ethanol with a volume ratio of 1:1, Then extract 2h under the condition of 75 ℃, after removing the extract, obtain the bamboo powder after the extraction; the bamboo powder after the extraction is adopted chemical method under the condition of 60% benzenesulfonate aqueous solution by mass fraction To remove lignin, the mass volume ratio of bamboo powder and benzenesulfonate solution is 1:20g / mL, and then remove hemicellulose under alkaline conditions after separating lignin liquid to obtain bamboo cellulose.

[0040] Take 80g of bamboo cellulose, add it to 1.5L aqueous solution containing 0.75g of 2,2,6,6-tetramethylpiperidine oxide, 3.25g of sodium bromide, and 7.5g of sodium hypochlorite solution, then...

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Abstract

The invention discloses a wood-plastic composite material which is prepared from the following raw materials in parts by weight: 0.1-5 parts of cellulose nano fiber, 5-30 parts of plant fiber powder,30-90 parts of polyvinyl chloride particles, 25-80 parts of nano calcium carbonate, 0.5-2 parts of nano zinc oxide, 1-5 parts of an AC foaming agent, 0.5-2 parts of a coupling agent and 0.5-3 parts ofa lubricant. In the wood-plastic composite material disclosed by the invention, the cellulose nano fiber is added, which is nanoscale fiber obtained by defibrillation of natural plant fiber and has the properties of great length-diameter ratio, large specific surface area and low thermal expansion and can effectively improve the toughness and impact strength of the wood-plastic composite material. Moreover, the cellulose nano fiber can serve as a foaming nucleation point in the composite material foaming process, and under the action of the foaming agent, is helpful in forming microporous bubbles of the composite material, reducing the bubble size and improving the uniformity of the bubble structure, wherein the microporous structure can make the material light and also can adsorb organicvolatile gases or allergic matters such as formaldehyde generated indoors.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a wood-plastic composite material and a preparation method thereof. Background technique [0002] Wood-plastic composite materials made of plant fibers such as wood powder and polymer resins (such as polyethylene, polypropylene, and polyvinyl chloride) as main raw materials have developed rapidly at home and abroad in recent years. Wood-plastic composite materials have water resistance, With the characteristics of corrosion resistance, high strength and easy processing, it can be widely used in outdoor garden architecture, interior decoration materials, furniture, packaging materials and other fields. [0003] With bamboo and wood plant fiber powder, polyvinyl chloride (PVC) resin, and calcium carbonate particles as the main raw materials, the technology for manufacturing integrated wall materials through high-temperature extrusion molding is also developing rap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L1/02C08L97/02C08K3/26C08K3/22C08J9/10D06M13/388D06M11/30D06M11/50D06M11/13D06M13/203D06M13/224D06M101/06D06M101/04
CPCC08J9/0061C08J9/008C08J9/009C08J9/103C08J2203/04C08J2327/06C08J2401/02C08J2497/02C08K2003/2296C08K2003/265C08K2201/011D06M11/13D06M11/30D06M11/50D06M13/203D06M13/2246D06M13/388D06M2101/04D06M2101/06
Inventor 邓腊云陈泽君王勇范友华马芳李志高
Owner HUNAN ACAD OF FORESTRY
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