Method for preparing novel polyethylene wood-plastic composite material

Abstract

The invention discloses a method for preparing a novel polyethylene wood-plastic composite material. The method comprises the following steps: (1) smashing a rape stalk, a cotton stalk and a cotton straw, baking to obtain wood powder, immersing the wood powder in a NaOH solution to perform ultrasonic treatment, taking out, rinsing by deionized water, drying and screening to obtain the alkalified wood powder; (2) mixing polyethylene, maleic anhydride, rare earth oxide and DCP to obtain a rare earth compatilizer; (3) adding phenolic resin and rare earth chloride into a reaction kettle, heating and stirring, heating the reaction solution till boiling, performing reflux reaction, continuously heating, keeping the temperature, stopping heating and reacting to obtain the rare earth phenolic resin; (4) mixing polyethylene, the alkalified wood powder, the compatilizer and the rare earth phenolic resin, moving to an oven, and drying to achieve constant weight to obtain the mixed materials; (5) adding the mixed materials into a conical twin-screw extruder, extruding and granulating to obtain the granules, and baking to obtain the polyethylene wood-plastic composite material.

Description

Technical field:

[0001] The invention relates to a building material, in particular to a preparation method of a polyethylene wood-plastic composite material. Background technique:

[0002] Wood-plastic composites (Wood-Plastic Composites, referred to as WPC) is a new type of composite material that has been booming at home and abroad in recent years. New wooden materials mixed with waste plant fibers such as rice husks, straws, etc., and then processed into plates or profiles produced by extrusion, molding, injection molding, etc., are mainly used in building materials, furniture, logistics packaging and other industries. Polyethylene wood-plastic composite material is one of the most widely used wood-plastic composite materials, with good processing performance, strength, adjustability, and light stability.

[0003] For example, the Chinese patent with the publication number CN101792609B and the publication date of 2012.04.18, and the applicant is Dezhou Sanhui Wood-Plast...

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