Micro nanometer-enhanced wood plastic composite board and preparation method thereof

Abstract

The invention relates to a wood plastic material, in particular to a micro nanometer-enhanced wood plastic composite board and a preparation method thereof. The preparation method comprises the following steps of: hydrolyzing ethenyl triethoxy silane, and modifying wood powder by sealing pressurization reaction; mixing plastic granules, maleic anhydride grafting plastic granules, calcium carbonate powder and stearic acid, and extruding to obtain modified plastic granules; blending the modified plastic granules, the modifying wood powder, talcpowder, terpene resin and an antioxidant and granulating to obtain micro nanometer-enhanced wood plastic granules; and extruding the micro nanometer-enhanced wood plastic granules to form the micro nanometer-enhanced wood plastic board. The micro nanometer-enhanced wood plastic board can be recycled, is low in cost, has high mechanical properties and is an ideal material for replacing wood; and compared with the conventional wood material, the micro nanometer-enhanced wood plastic composite board has a longer service life, is a novel upgrading and updating product of the conventional wood plastic material, and can be widely applied in fields of traffic, buildings, decoration, municipal administration, gardens, packaging and the like.

Description

technical field [0001] The invention relates to a plastic-wood composite material, in particular to a micro-nano reinforced plastic-wood composite material plate and a preparation method thereof. Background technique [0002] In recent years, with the enhancement of people's awareness of environmental protection, wood-plastic composite materials with a wide range of raw materials, environmentally friendly, renewable and recyclable materials have attracted more and more attention. Wood-plastic composite materials are prepared by compounding polymers (mostly thermoplastic polyolefins) and plant fibers (mostly wood powder). This material has the excellent properties of both plastics and wood, no cracking, no deformation, and corrosion resistance , strong plasticity, can realize personalized modeling very simply, high environmental protection, no pollution, no pollution, the product does not contain benzene, formaldehyde and other substances, and can be recycled, etc. It is a ne...

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Problems solved by technology

However, since plant fibers, one of the main raw materials for preparing wood-plastic composite materials, are mainly composed of cellulose, hemicellulose and lignin, which contain a large number of polar groups such as alcoholic hydroxyl groups, oxygen and phenolic hydroxyl groups, the preparation of wood-plastic composite materials The surface of thermoplastic polyolefin, another main raw material of the material, is non-polar (low) polar, so the polarity of the two is very different, and the hydroxyl groups in the plant fibers can form intermolecular hydrogen bonds and entangle with each other, making it uneven The above two factors often lead to poor interfacial compatibility between fibers and plastics, coupled with the low reinforcing effect of natural fibers themselves, resulting in some obvious deficiencies in wood-plastic composite products, such as static The bending strength is low, the bearing capacity is poor, and bending may occur after long-term use. Especially when it is used in the air, bending deformation is more likely to occur, which affects its use effect, shortens its service life, and limits its use range.

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