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Method for preparing polyethylene-based thermoplastic wood-plastic composite material

A wood-plastic composite material and polyethylene technology, which is applied in the field of preparation of polyethylene-based thermoplastic wood-plastic composite materials, can solve the problems of poor compatibility between wood powder and thermoplastics, increased cost, poor performance, etc., and achieves easy mixing and The effect of processing, wood flour volume reduction, and simple method

Inactive Publication Date: 2008-07-30
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, thermoplastics commonly used to prepare wood-plastic materials mainly include polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), etc., which are usually used in guardrails, outdoor road boards, brackets, etc., although there are certain However, the compatibility of wood powder and thermoplastics is poor, and the performance after compounding is poor, which limits the development of wood-plastic materials and prevents them from being widely used.
Therefore, the research on the compatibility of wood flour and thermoplastics is also gradually launched, such as modifying wood flour with coupling agent (CN02157950.4; CN200510060794.1), but the performance is not ideal; grafting maleic anhydride, ethylene with polyolefin - Vinyl acetate copolymer, ethylene-acrylate copolymer (CN200410077610.8; CN02160123.2), ionomer (CN200610005590.2) and polyolefin grafted silane as modifier (CN02125652.7), need to be prepared in advance Good modifier, or increase the cost or increase the process flow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw material components are by weight: 30 parts of activated wood powder (composite of 28 parts of bamboo powder and 2 parts of (methacryloyloxy) propyltrimethoxysilane), 65 parts of high-density polyethylene, 0.15 parts of dipentamyl 0.05 parts of triphenylphosphine, 2 parts of liquid paraffin, 2 parts of zinc stearate and 0.8 parts of antioxidant 1010.

[0022] First bamboo powder and (methacryloyloxy)propyltrimethoxysilane are fully mixed on a high-speed mixer, and the rotating speed is 4500 rpm, and activated in a 120°C oven for 3 hours to make activated wood powder, and then High-density polyethylene, azobisisobutylcyanide (AIBN), triphenylphosphine, liquid paraffin, zinc stearate and antioxidant 1010 are mixed uniformly on a high-speed mixer, and the rotating speed of the high-speed mixer is 9000 rpm, and then The mixed material is reacted and extruded in a twin-screw extruder to make pellets. The melting temperature of the screw is 180°C, the rotation speed i...

Embodiment 2

[0024] The raw material components are by weight: 70 parts of activated wood powder (67 parts of cotton stalk powder, 2 parts of oleic acid and 1 part of styrene), 27 parts of low-density polyethylene, 0.3 part of azobisisobutylcyanide (AIBN), 0.2 part of monobutyl tin oxide, 1 part of N, N-diethylene stearic acid amide, 0.5 part of dioctyl adipate and 1 part of antioxidant 1098.

[0025] First, fully mix cotton stalk powder, oleic acid and styrene on a high-speed mixer, the speed of the high-speed mixer is 6000 rpm, and activate it in an oven at 80°C for 2 hours to make activated wood powder, then mix low-density polyethylene, AIBN, monobutyltin oxide, N, N-diethylene stearic acid amide, dioctyl adipate and antioxidant 1098 are mixed homogeneously on high-speed mixer, and the rotating speed of high-speed mixer is 4500 rev / mins, then will The mixed material is reacted and extruded in a twin-screw extruder to make pellets. The melting temperature of the screw is 120°C, the rota...

Embodiment 3

[0027]50 parts of activated wood powder (a compound of 40 parts of fruit shell powder and 10 parts of vinyl glycidyl ester), 30 parts of linear low-density polyethylene, 10 parts of ultra-high molecular weight polyethylene, 0.1 part of DCP, 0.3 parts of TBHP, dilaurel 0.4 part of dibutyltin acid, 5 parts of organosilane, 3 parts of ATBC, 0.2 part of antioxidant T501 and 1 part of antioxidant 626. Firstly, fully mix the husk powder and vinyl glycidyl ester on a high-speed mixer, the speed of the high-speed mixer is 9000 rpm, and activate it in an oven at 130°C for 2 hours to make activated wood flour, and then linear low-density polymer Ethylene, ultra-high molecular weight polyethylene, DCP, TBHP, dibutyltin dilaurate, organosilane, ATBC, antioxidant T501 and antioxidant 626 are mixed uniformly on a high-speed mixer, and the rotating speed of the high-speed mixer is 7500 rpm, and then The mixed material is reacted and extruded in a twin-screw extruder to make pellets. The melt...

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Abstract

The invention relates to a preparation method of polyethylene base thermoplastic wood and plastic composite material. Firstly, liquid monomers which have good appetence with wood powder and have grafting reaction with polyethylene are directly compounded with wood powder to form activated wood powder; secondly, the reaction extrusion is performed to polyethylene, initiator, catalyst, activated wood powder, lubricant, plasticizer and stabilizer by adopting a double screw extruder, to prepare the polyethylene base thermoplastic wood and plastic composite material which has advantages that the integrated performance is superior, the surface is smooth, and the material can be extruded, die-pressed and molded by injection, etc. The method of the invention is simple, in which the process that the graft copolymer is firstly prepared in the past is omitted, simultaneously, because the liquid monomer can be adsorbed by the wood powder, the volume of the wood powder is reduced, which is convenient for blending and processing.

Description

technical field [0001] The invention relates to a preparation method of a polyethylene-based thermoplastic wood-plastic composite material, and the prepared composite material can be used as packaging materials, environmental protection materials, decoration materials and the like. The invention belongs to the technical field of polymer processing. Background technique [0002] The continuous development of synthetic polymer material science and technology has improved people's living standards, but it has also brought about environmental pollution and resource shortages. With the strengthening of environmental protection awareness, the deforestation of forests around the world has begun to be restricted, but the demand for wood has greatly increased. Therefore, environmentally renewable bio-based materials such as wood powder, bamboo powder, rice bran, wheat straw, cotton stalk And the utilization of fruit shell etc. has caused people's widespread concern. Environmentally...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L97/02C08K5/00B29B9/12B29C47/92B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/40B29C2948/92561B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 熊成戚嵘嵘
Owner SHANGHAI JIAO TONG UNIV
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