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Plasticized and toughened wood flour/polypropylene composite and method for preparing same

A composite material, polypropylene technology, applied in the field of plasticized and toughened wood powder/polypropylene composite material, composition and preparation of plasticized and toughened wood powder/polypropylene composite material, which can solve the problem of decreased processing fluidity and impact toughness and other problems, to achieve the effect of reducing processing temperature and color, improving processing fluidity and impact toughness

Inactive Publication Date: 2011-09-07
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increase of wood powder content, the texture, cutting and bonding properties of wood-plastic composites are closer to solid wood, but its processing fluidity and impact toughness drop sharply

Method used

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  • Plasticized and toughened wood flour/polypropylene composite and method for preparing same
  • Plasticized and toughened wood flour/polypropylene composite and method for preparing same
  • Plasticized and toughened wood flour/polypropylene composite and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The material provided by the invention is formulated by weight ratio from the following raw materials:

[0019]

[0020] First, the pine wood powder in the above raw materials was dried in a blast oven at 110°C for 2 hours; then liquid paraffin and nano silicon dioxide were mixed with a high shear emulsifier for 5 minutes to obtain a nano sol; finally Homopolypropylene and maleic anhydride grafted polypropylene are mixed evenly with a low-speed mixer, then fed into the twin-screw extruder from the main feeder, and pine wood powder is added into the twin-screw extruder through the side feeder, and the prepared nano The sol is fed into the twin-screw extruder through a metering pump to obtain a plasticized and toughened wood flour / polypropylene composite material. The barrel temperature of the extruder is 160-200° C., and the screw speed is 100 rpm.

Embodiment 2

[0022] The material provided by the invention is formulated by weight ratio from the following raw materials:

[0023]

[0024]

[0025] First, dry the fir powder in the above raw materials in a blast oven at 100°C for 3 hours; then mix liquid paraffin and nano-silica with a high-shear emulsifier for 5 minutes to obtain a nano-sol; Random copolymerized polypropylene and methyl methacrylate grafted polyethylene were mixed evenly with a low-speed mixer, and then fed into the twin-screw extruder from the main feeder, and fir powder was added into the twin-screw extruder through the side feeder, and the prepared The obtained nano-sol is fed into a twin-screw extruder through a metering pump to obtain a plasticized and toughened wood flour / polypropylene composite material. The barrel temperature of the extruder is 150-190° C., and the screw speed is 120 rpm.

Embodiment 3

[0027] The material provided by the invention is formulated by weight ratio from the following raw materials:

[0028]

[0029] First, dry the pine wood powder in the above-mentioned raw materials in a blast oven at 110°C for 2 hours; then mix the liquid polyisobutylene and nano-montmorillonite with an ultra-speed mixer for 10 minutes to obtain a nano-sol; finally mix the homopolymer Polypropylene and glycidyl methacrylate grafted polypropylene are mixed evenly with a low-speed mixer and then added to the twin-screw extruder from the main feeder, and the pine wood powder is added to the twin-screw extruder through the side feeder, and the prepared The nano-sol is fed into the twin-screw extruder through a metering pump to obtain a plasticized and toughened wood powder / polypropylene composite material. The barrel temperature of the extruder is 140-190° C., and the screw speed is 140 rpm.

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Abstract

The invention discloses a method for preparing plasticized and toughened wood flour / polypropylene composite. The method comprises the following specific steps: mixing a plasticizer with nanoparticles by using a high-shear emulsifier, an emulsifying pump or an over-speed mixer to prepare a nano-sol, injecting the nano-sol into a twin-screw extruder by using a metering pump, and carrying out melt blending on the nano-sol with polypropylene and wood flour to prepare the plasticized and toughened wood flour / polypropylene composite. The plasticized and toughened wood flour / polypropylene composite product plasticized and toughened wood flour / polypropylene composite product is prepared after carrying out subsequent processes including mold pressing, calendaring, extruding, injecting and molding to the plasticized and toughened wood flour / polypropylene composite. Compared with the common wood-plastic composite used widely at present, the plasticized and toughened wood flour / polypropylene composite has better processing flowability and impact toughness.

Description

technical field [0001] The invention relates to a plasticized and toughened wood powder / polypropylene composite material, more specifically to a composition and preparation method of a plasticized and toughened wood powder / polypropylene composite material, and belongs to the field of polymer blending and polymer molding processing . Background technique [0002] my country is a country with relatively scarce forest resources, facing 6 million meters of forests every year. 3 Timber supply gap. However, the utilization rate of wood in our country is very low, and 20-30% of wood powder and leftover materials are not effectively utilized in the process of wood processing and use. According to statistics, the amount of waste wood powder left by wood processing in my country reaches millions of tons every year, and the output of other natural fibers such as rice bran reaches tens of millions of tons. If these resources can be effectively developed and utilized, they will be able...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L23/12C08L23/14C08L53/00C08L51/06C08K13/02C08K3/36C08K3/26C08K3/34
Inventor 潘泳康徐正哲唐颂超王庆海
Owner EAST CHINA UNIV OF SCI & TECH
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