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Wood-plastic composite material and preparation method thereof

A wood-plastic composite material and plastic technology, which is applied in the field of polymer material modification, can solve problems such as poor interface compatibility, and achieve the effects of improving interface bonding properties, improving mechanical properties, and being difficult to decompose.

Active Publication Date: 2013-05-08
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defect of poor interface compatibility between wood powder and plastics in the prior art, the purpose of the present invention is to provide a wood-plastic composite material, which significantly improves the compatibility between wood powder and plastic matrix. interface binding properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Treatment of wood powder: Dry 20 parts of ordinary wood powder at 100°C for 3 hours, put them into the prepared mixed treatment solution, wherein the mass ratio of TEOS:KH550:absolute ethanol in the mixed treatment solution is 1:1 : 1, add 0.5% hydrochloric acid (the mass fraction of hydrochloric acid consumption is mixed treatment liquid is 0.5%), stir 10min at normal temperature, hydrolysis polycondensation reaction takes place to form a layer of silica sol on the surface of wood flour; Take out and drain; Dry in air atmosphere for 48 hours, and then dry in air atmosphere at 100°C for 1 hour to obtain silanized wood powder for later use.

[0041] (2) Preparation of wood-plastic composite material: the above 20 parts of silanized wood powder, 75 parts of PP (T30S), 0.5 parts of antioxidant 1010, 4.5 parts of ultraviolet stabilizer UV-327, first on the open mill Pre-mix for 10 minutes; then press molding with a flat vulcanizer, where the pressing temperature is 190°...

Embodiment 2

[0047] (1) Treatment of wood powder: Dry 35 parts of ordinary wood powder at 100°C for 3 hours, put them into the prepared mixed treatment solution, wherein the mass ratio of TEOS:KH550:absolute ethanol in the mixed treatment solution is 1:1 : 1.5, add 1.2% hydrochloric acid (the mass fraction of hydrochloric acid consumption is mixed treatment liquid is 1.2%), stir 10min at normal temperature, hydrolysis polycondensation reaction takes place to form one layer of silica sol on the surface of wood flour; Take out and drain; Dry in air atmosphere for 48 hours, and then dry in air atmosphere at 100°C for 2 hours to obtain silanized wood powder for later use.

[0048] (2) Preparation of wood-plastic composite material: 35 parts of silanized wood powder, 60 parts of PP (T30S), 0.5 part of antioxidant 1010, 3 parts of ultraviolet stabilizer UV-327, and 5 parts of polyethylene wax are fully After mixing for 60 minutes, add a twin-screw extruder to extrude and granulate, in which the ...

Embodiment 3

[0050] (1) Treatment of wood flour: Dry 50 parts of ordinary wood flour at 100°C for 3 hours, put it into the prepared mixed treatment solution, the mass ratio of TEOS:KH550:absolute ethanol in the mixed treatment solution is 1:1.5: 1.5, add 2% hydrochloric acid (the amount of hydrochloric acid is that the mass fraction of the mixed treatment solution is 2%), stir at normal temperature for 60min, a hydrolysis polycondensation reaction occurs to form a layer of silica sol on the surface of the wood flour; take it out and drain; place Dry under air atmosphere for 120 hours, and then dry under air atmosphere at 100° C. for 3 hours to obtain silanized wood powder, which is ready for use.

[0051] (2) Preparation of wood-plastic composite materials: 50 parts of silanized wood powder, 40 parts of PP (T30S), 0.25 parts of antioxidant 1010, 2 parts of ultraviolet stabilizer UV-327, and 7 parts of polyethylene wax are fully After mixing for 60 minutes, add a twin-screw extruder to extr...

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Abstract

The invention belongs to the field of high-molecular material modified technology, and discloses a wood-plastic composite material and a preparation method thereof. The wood-plastic composite material is prepared by the following components of, by weight, 40-75 parts of a plastic substrate, 20-50 parts of wood powder and 5-10 parts of auxiliary agents. The preparation method of the wood-plastic composite material comprises the following steps of (1) mixing 20-50 parts of the wood powder, 40-75 parts of the plastic substrate and 5-10 parts of the auxiliary agents which are treated by silanization adequately, for 10-60 min; (2) extruding and granulating the uniform mixture obtained from the step (1) by using a double screw extruder, forming by introducing the obtained materials into an injection machine or flat-panel vulcanizing machine, or forming by introducing the uniform mixture obtained from the step (1) into the flat-panel vulcanizing machine. An inorganic layer is formed on the surface of the wood powder, thereby facilitating improving the interface bonding property between the inorganic layer and the plastic matrix, increasing heat resistant temperature of the wood powder and allowing the wood powder not to be decomposed in a processing process.

Description

technical field [0001] The invention belongs to the technical field of polymer material modification, and relates to a wood-plastic composite material and a preparation method thereof. Background technique [0002] Wood-plastic composites (WPC for short) is a modified thermoplastic composite material filled with wood powder, which is formed by extrusion, injection molding, molding and other methods. Wood powder is generally traditional wood powder, bamboo powder, rice straw, fruit shell powder, etc. Thermoplastics mainly include polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), Acrylonitrile-styrene-butadiene copolymer (ABS). The raw material of wood-plastic composite material basically comes from waste, which is an environmentally friendly material. [0003] Because wood flour with strong water absorption has strong polarity, and plastic has non-polar characteristics, the interface compatibility between wood flour and plastic is not good. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08L27/06C08L25/06C08L55/02C08L97/02C08H8/00B29B9/06
Inventor 徐龙彬
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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