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Method for producing fiberboards by lignocelluloses as raw materials

A technology of lignocellulose and fiberboard, applied in fiber raw material processing, application, household appliances, etc., can solve the problems of not using chemical adhesives, environmental pollution, high cost, etc.

Inactive Publication Date: 2012-08-29
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to achieve the above object, the present invention aims at the problem of environmental pollution caused by the release of formaldehyde from chemical adhesives used in current fiberboards and the problem of high cost caused by directly using laccase to treat lignocellulose raw materials, and proposes a method that does not use chemical adhesives, does not A new process for the preparation of fiberboard by the combination of biomodification of basidiomycetes purely relying on laccase and hot pressing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 Basidiomycete liquid spawn preparation (1)

[0032] Put the Yunzhi (Coriolus sp.) slant strain stored in the refrigerator on the potato medium slant for activation, cultivate until the mycelia cover the slant, take 2 mycelium slant blocks and insert them into 100mL potato liquid medium for cultivation , cultured at 150r / min at 28°C for 4 days, and then scaled up step by step to a 5-ton fermenter according to the inoculation volume percentage of 10%. The fermentation conditions were 150r / min, the ventilation rate was 1:0.5, and the temperature was 28°C. Obtain basidiomycetes liquid strains.

Embodiment 2

[0033] Embodiment 2 Basidiomycetes liquid spawn preparation (2)

[0034] Insert the slant strain of Echinodontium sp. stored in the refrigerator into the slant of potato medium for activation. After culturing until the slant is covered with mycelium, take a block of mycelium slant and insert it into the potato liquid medium for Cultivate at 33°C at 50r / min for 5 days, then scale up step by step to a 5-ton fermenter according to the inoculation volume percentage of 2%. The basidiomycete liquid strain is obtained.

Embodiment 3

[0035] Embodiment 3 basidiomycetes liquid spawn preparation (3)

[0036] Put the slant strain of Armillariella sp. stored in the refrigerator into the slant of potato medium for activation. After culturing until the slant is covered with mycelium, take 4 pieces of slant of mycelium and insert them into the potato liquid medium for 2 days According to the volume percentage of 20%, the Armillariella sp. (Armillariella sp.) bacterial liquid was inoculated into the potato liquid medium, the fermentation condition was 250r / min, the ventilation rate was 1:0.3, the temperature was 25°C, and cultured for 6 days to obtain the basidiomycete liquid strains.

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Abstract

The invention provides a method for producing fiberboards by lignocelluloses as raw materials. The method comprises the steps as follows: degrading and transforming the lignocelluloses through the biological modification effect of special basidiomycetes; enabling the modified lignocelluloses to have a physical structure with stronger adhesion effect, and chemical properties; and carrying out compression of various density fiberboards on the modified lignocelluloses through a hot press process so as to prepare the density fiberboards free of chemical adhesives. An effective solution is provided for new material preparation, environmental protection and low-carbon economy. According to the method, the chemical adhesives are not added, the fiberboards do not need to be produced by the biological modification-thermocompression bonding process for the basidiomycetes of the added expensive laccases, and the problems of environmental pollution due to formaldehyde released by the chemical adhesives used in the conventional fiberboards, high cost due to treatment of the directly added laccases on the lignocelluloses, or the like is effectively solved.

Description

technical field [0001] The invention relates to the fields of fermentation engineering and building material processing, in particular to a method for producing novel fiberboards by biologically modifying raw materials such as straws with lignocellulose as the main component by basidiomycetes. Background technique [0002] my country's forest resources are relatively scarce, resulting in a serious shortage of timber resources in our country. On the other hand, according to statistics, my country's man-made fiberboard production reached 94.0995 million cubic meters in 2008, an increase of 6.6% over 2007, an increase of 3.7 times over 2001.67 million cubic meters in 2000, and an average annual increase of 46%. There are more than 6,000 man-made fiberboard enterprises in my country, and the production scale reaches more than 90 million cubic meters per year. It has become the world's largest producer and consumer of man-made fiberboard. Although my country's man-made fiberboar...

Claims

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Application Information

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IPC IPC(8): D21C5/00B27N3/08
Inventor 张晓昱邬建国李茂钒张鑫
Owner HUAZHONG UNIV OF SCI & TECH
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