Atmospheric pressure cold plasma modifying method for plant fiber and application of modifying method in wood-plastic composite material

A technology of wood-plastic composite materials and cold plasma, which is applied in the field of plant fibers and composite materials, can solve the problems of affecting the dimensional stability and durability of materials, affecting the interface bonding force of materials, and the decline of mechanical properties of materials, and achieve surface roughness Increased free energy, increased surface free radicals, and good interfacial compatibility

Inactive Publication Date: 2014-05-21
FUJIAN AGRI & FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, since plant fibers are hydrophilic and polar materials, while plastics are hydrophobic and non-polar materials, the interfacial compatibility between the two has always been the key to the preparation of wood-plastic composites.
However, these pretreatment methods have defects such as complicated process and pollution to the environment; moreover, when plasma treatment methods are usually used, more expensive vacuum equipment is required. Therefore, a new method of plant modific

Method used

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  • Atmospheric pressure cold plasma modifying method for plant fiber and application of modifying method in wood-plastic composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Place the wood powder (with an average particle size of 50 mesh) in an oven at 100°C for 8 hours to dry to obtain wood powder with a moisture content of 3% and an average particle size of 50 mesh. The wood flour was treated with atmospheric pressure cooled plasma, the reaction gas was argon, the gas flow rate was 15 L / min, the processing power was 600 W, the processing voltage was 5000 V, the processing distance was 15 mm, and the processing time was 5 min. wood flour. Commercially available high-density polyethylene (model DMDA-8008, density 0.95 g / cm 3 , melting point is 135°C, melt index is 6.5 g / 10min) 100 parts, lubricant (stearic acid and calcium stearate mixed at a ratio of 1:1) 1 part, 50 parts of the above-mentioned modified wood flour are put into high-speed mixing In the machine, after mixing for 20 minutes, cool and unload, make a premix and then extrude and granulate. The granulation temperature is 165°C and the granulation time is 20 minutes to obtain woo...

Embodiment 2

[0032] Bamboo powder (with an average particle size of 50 mesh) was placed in an oven at 105°C and dried for 8 hours to obtain bamboo powder with a moisture content of 3% and an average particle size of 50 mesh. Bamboo powder was treated with atmospheric pressure cooled plasma, the reaction gas was a mixture of argon and nitrogen with a volume ratio of 1:1, the gas flow rates of argon and nitrogen were 10 L / min and 1 L / min, respectively, and the processing power was 600 W , the treatment voltage was 5500 V, the treatment distance was 15 mm, and the treatment time was 6 minutes to obtain modified bamboo powder. Commercially available polypropylene (model K8303, density 0.90 g / cm 3 , melting point is 168°C, melt index is 3.2 g / 10min) 100 parts, lubricant (stearic acid and calcium stearate mixed at a ratio of 1:1) 1.5 parts, modified bamboo powder 80 parts into the high-speed mixer In the process, after mixing for 25 minutes, cool and unload, make a premix and then extrude and g...

Embodiment 3

[0034] The rice husk powder (with an average particle size of 80 mesh) was placed in an oven at 105°C and dried for 9 hours to obtain rice husk powder with a moisture content of 2% and an average particle size of 80 mesh. Atmospheric pressure-cooled plasma was used to treat wood powder, the reaction gas was a mixture of argon and acetylene (volume ratio 1:5), the gas flow rates of argon and acetylene were 12 L / min and 1 L / min, respectively, and the processing power was 600 W, the processing voltage was 6000 V, the processing distance was 15 mm, and the processing time was 8 min to obtain modified rice husk powder. Commercially available high-density polyethylene (model DMDA-8008, density 0.95g / cm 3 , with a melting point of 135°C and a melt index of 6.5 g / 10min), 100 parts, 3 parts of lubricant (stearic acid and calcium stearate are mixed at a ratio of 1:1), 120 parts of modified rice husk powder, put into high speed In the mixer, after mixing for 30 minutes, cool and unload,...

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Abstract

The invention discloses an atmospheric pressure cold plasma modifying method for plant fiber and an application of the modifying method in a wood-plastic composite material. According to the modifying method disclosed by the invention, the plant fiber is modified through plasma, wherein the plasma is an atmospheric pressure glow discharge plasma. The method is simple and convenient, under normal pressure and free from vacuum equipment, and the method is environment-friendly, free from pollution, as well as short and efficient in treatment course; surface roughness and surface free energy of the plasma-modified plant fiber are enhanced, surface free radical is increased and interfacial compatibility with non-polar plastic is obviously improved, and the plant fiber can be used for preparing the wood-plastic composite material which is high in plant fiber content and excellent in comprehensive performance; and preparation of the composite material is excellent in social, economic and ecological benefits, and is good in market space and application prospect.

Description

technical field [0001] The invention relates to an atmospheric pressure-cooled plasma modification method for plant fibers and its application in wood-plastic composite materials, which belongs to the field of plant fibers and also belongs to the field of composite materials. Background technique [0002] Wood-Plastic Composite (WPC for short) is a new type of green composite compounded by extrusion, hot pressing or injection molding with various lignocellulosic fiber materials as the reinforcing phase and various plastics as the matrix. Environmentally friendly composite materials have broad market space and application fields. Its development and wide application can not only alleviate the shortage of wood resources, improve the utilization rate of plant resources, and reduce the environmental pollution caused by the incineration of agricultural waste; but also reduce the pollution of plastic waste and alleviate the shortage of petrochemical resources. [0003] However, s...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L23/06C08L23/12C08K5/09C08K5/098
Inventor 周吓星陈礼辉黄六莲苏国基
Owner FUJIAN AGRI & FORESTRY UNIV
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