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Preparation method of fully-degradable polymer wood plastic composite

A wood-plastic composite material and polymer technology, which is applied in the field of natural polymer material preparation to achieve the effects of excellent comprehensive performance, obvious social benefits and simple method.

Inactive Publication Date: 2010-11-17
SHANGHAI JIAOFU NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combining thermoplastic starch plastics with plant fibers is expected not only to further obtain cheap biodegradable materials, but also to have a good natural appearance of products obtained from the biodegradable materials, but there is no literature report on the combination of thermoplastic starch plastics and plant fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 40 parts of corn starch, 40 parts of wood flour, 10 parts of glycerin, 8 parts of borax, 1.5 parts of styrene-maleic anhydride copolymer, and 0.5 parts of acrylic anhydride copolymer on a high-speed mixer, and the speed of the high-speed mixer is 3000 rpm / min, and then put the mixed material into a twin-screw extruder to extrude into pellets, the screw temperature is 70 / 90 / 100 / 140 / 150 / 165°C, and the rotation speed is 100 rpm. The residence time of the material in the screw is 15 minutes. After the extruded material is cooled, it is pelletized by a pelletizer to obtain pellets, and dried in a vacuum oven at 60° C. for 5 hours.

Embodiment 2

[0023] Mix 80 parts of corn starch, 10 parts of wood flour, 5 parts of glycerin, 3 parts of borax, 1.5 parts of styrene-maleic anhydride copolymer, and 0.5 parts of acrylic anhydride copolymer on a high-speed mixer, and the speed of the high-speed mixer is 3000 rpm / min, and then put the mixed material into a twin-screw extruder to extrude into pellets, the screw temperature is 70 / 90 / 100 / 140 / 150 / 165°C, and the rotation speed is 100 rpm. The residence time of the material in the screw is 15 minutes. After the extruded material is cooled, it is pelletized by a pelletizer to obtain pellets, and dried in a vacuum oven at 60° C. for 5 hours.

Embodiment 3

[0025] 40 parts of wheat starch, 20 parts of husk powder, 30 parts of ethylene glycol, 6 parts of glutaraldehyde, 2 parts of polyurethane, 2 parts of methyl methacrylate and butyl acrylate copolymer, in a rotating speed of 4000 rpm Mix evenly on a high-speed mixer, and then put the mixture into a twin-screw extruder to extrude into pellets. The screw temperature is 50 / 80 / 120 / 150 / 180 / 200°C, and the rotation speed is 200 rpm. The residence time of the material in the screw is 15 minutes. After the extruded material is cooled, it is pelletized by a pelletizer to obtain pellets, and dried in a vacuum oven at 80° C. for 6 hours.

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Abstract

The invention relates to a preparation method of a fully-degradable polymer wood plastic composite, which comprises the following steps: evenly mixing 30-90 weight parts of starch, 5-50 weight parts of vegetable fiber, 0.5-40 weight parts of plasticizer, 0.5-10 weight parts of cross-linking agent, 0.5-10 weight parts of intensifier and 0.5-2 weight parts of brightener by a double screw extruder on a homo-mixer; carrying out reaction and blending; then extruding the mixed material into grains in the double screw extruder, wherein the temperature of a screw rod is 70-250 DEG C, and the dwell time of the material in the screw rod is 0.5-30 minutes; and drying in a vacuum drying oven to obtain the biodegradable wood plastic composite with good performance and bright surface. The invention has simple method, and the obtained composite has the advantages of good overall performance, environmental degradation, obvious social benefit and the like, and can be used as packaging material, material of products of everyday consumption, finishing material and the like.

Description

technical field [0001] The invention belongs to the technical field of natural polymer material preparation, and relates to a preparation method and application of a fully degradable polymer wood-plastic composite material. Background technique [0002] Although synthetic polymer materials bring convenience to people's lives, most of their materials come from petroleum, which leads to energy shortages. And because most synthetic polymer materials do not have biodegradability, serious environmental pollution problems are caused after being discarded. The development and application of biodegradable polymer materials can fundamentally solve the problem of environmental pollution, so the research and application of biodegradable polymer materials have received more and more attention. [0003] Wood-plastic composite material is a new type of material made of wood fiber or plant fiber as the main component, which is pretreated to compound it with thermoplastic resin or other ma...

Claims

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Application Information

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IPC IPC(8): B29C47/00C08L3/02C08K13/02C08K7/02B29C47/92B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/40B29C2948/9259B29C2948/92885
Inventor 朱君袁艳萍宰建陶
Owner SHANGHAI JIAOFU NEW MATERIAL SCI & TECH
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