Method for improving plasticity of wood fiber raw material

A wood fiber raw material and plastic technology, applied in the field of materials, can solve the problems of inability to realize environmental protection and energy saving production, limit the large-scale production of wood fiber, secondary pollution, etc. The effect of secondary pollution

Active Publication Date: 2015-03-11
JIANGSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current treatment technology involves the addition of plasticizers or plastic products, which not only limits the large-scale production of wood fiber, but also causes secondary pollution, and cannot achieve environmental protection and energy-saving production.

Method used

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  • Method for improving plasticity of wood fiber raw material
  • Method for improving plasticity of wood fiber raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Collect 1000kg of harvested wheat straw, after natural air-drying (moisture content 12%), use a pulverizer to crush into particles with a particle size of about 3mm, add 100kg of straw decomposing agent (accounting for about 11.4% of the dry weight of the straw), add 2kg of starch and an appropriate amount of urea, so that the carbon-nitrogen ratio of the mixed material is 30:1, add quicklime to adjust the pH to 7.5, and finally add water until the moisture content of the mixed material is 65%, stir the mixed material into a conical shape and put it On bare ground and covered with plastic film, monitor once an hour and record the temperature of the mixed material. When the temperature of the material does not change or decreases, the material needs to be fully turned to keep the oxygen content inside the lignocellulosic raw material at about 20%. Fermentation The time is 20 days, the accumulated temperature of the material is 900°C, the fermentation is finished, and the ...

Embodiment 2

[0020] Mix the collected rice husk and rice straw at a ratio of 1:1, take 1000kg of the mixture and dry it naturally until the moisture content is 8%, use a pulverizer to crush the mixture into particles with a particle size of about 2mm, and then add 150kg of decomposed compost (equivalent to wood 16.3% of the fiber raw material), add 3kg of soybean meal and an appropriate amount of urea, so that the carbon-nitrogen ratio of the mixed material is 40:1, add quicklime to adjust the pH to 7.6, and finally add water until the moisture content of the mixed material is 75%, stir evenly, Put the mixed material into the fermentation tank and cover it with a plastic film. Monitor and record the temperature of the mixed material every hour. During this period, according to the temperature change of the fermented material, the material needs to be fully turned (the oxygen content inside the wood fiber raw material is 30%), the plasticizing time is 15 days, and the accumulated temperat...

Embodiment 3

[0023] After natural drying, the rice husk with a moisture content of 15% was crushed into rice husk particles with a particle size of about 2.5 mm, and its rheological properties were measured by a torque rheometer, and 1000 kg of rice husk particles were taken, and 100 kg of decomposed compost (equivalent to 11.8% of the dry weight of rice husk particles), add 2kg of starch and an appropriate amount of urea to make the carbon-nitrogen ratio of the mixed material 35:1, add quicklime to adjust the pH to 7.5, and finally add water to the mixed material The moisture content is 65%, stir evenly, pile the mixed material into a cone shape and place it on the bare ground, and cover it with a plastic film, monitor once an hour and record the temperature of the mixed material. Fully turn the pile so that the oxygen content inside the lignocellulosic raw material is 25%. The accumulated temperature of the material in this example is 800°C. After about 15 days of fermentation, the plas...

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Abstract

The invention discloses a method for improving the plasticity of a wood fiber raw material, wherein the method comprises the specific steps: (a) drying the wood fiber raw material to make the moisture content below 20%, and then crushing to the particle size of less than or equal to 5 mm; (b) adding an inoculant and a conditioner to the wood fiber raw material obtained after being crushed in the step a, and adjusting the carbon / nitrogen ratio, the water content and the pH value; and (c) stacking the wood fiber raw material adjusted in the step b into a stacking shape or stacking in a fermentation vessel, fermenting, turning over the material irregularly, when the material accumulated temperature reaches 500-1000 DEG C, finishing fermentation, and thus obtaining the wood fiber raw material having the plasticity improved. The method is a microorganism treatment method, has no pollution to the environment, has no need of heating or pressurization and other physical processes, is low in energy consumption, simple in treatment process, and large in one-time processing amount, has no secondary pollution, and is suitable for large-scale popularization and use.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for improving the plasticity of lignocellulosic raw materials. Background technique [0002] Natural lignocellulosic raw material is a precious renewable resource, which is not only rich in sources and low in price, but also completely degradable. It is a natural and environmentally friendly polymer material, which has dual characteristics of elastic solid and viscous fluid, but Due to the high degree of polymerization and strong hydrogen bonding, lignocellulosic raw materials show poor processability and poor fluidity in the process of compression molding or extrusion molding. Therefore, improving the plasticity of natural lignocellulosic raw materials is of great significance for their material processing and utilization . [0003] At present, the modification of wood fiber is concentrated on chemical modification and physical modification. The plasticizing process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00C08L97/02C08L3/02C08K5/21
Inventor 武国峰黄红英常志州孙恩惠曲萍
Owner JIANGSU ACAD OF AGRI SCI
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