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Method for preparing lignin fibers for roads from corn straws

A technology of lignin fiber and corn stalks, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as lack of wood, and achieve the effect of expanding the scope of raw materials, improving the utilization rate of raw materials, and avoiding pollution

Inactive Publication Date: 2016-05-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

However, the lack of domestic wood is an important limiting factor for the widespread adoption of this production process; (2) for waste utilization, the invention patent with the authorized announcement number of CN101607800 discloses a kind of waste journal paper and waste newsprint as main raw materials The method of producing road-use lignin fiber, the production process is basically the process of repulping waste paper; (3) In order to reduce environmental pollution and wood use, Lu Haijun and others from Wuhan Institute of Technology [Lang Sen, Lu Haijun, Cai Guanghua , Experimental Research on Road Performance of Straw Fiber. Journal of Wuhan Institute of Technology. (2011) 30(1): 84-87】Study on the feasibility of using straw as the production of wood fiber

Method used

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  • Method for preparing lignin fibers for roads from corn straws

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Embodiment 1

[0014] The corn stalks harvested in the same year were chopped to 3-5 cm using a JL-800 straw grinder. Put the crushed corn stalks into a hydrothermal reactor, add tap water to make the water content about 50%, feed steam to heat to 160°C, and treat for 10min (the treatment intensity is log(10*exp((160-100) / 14.75)=2.77). After the hydrothermal treatment, the corn stalks are centrifugally dehydrated to about 25% of water content, and then the corn stalks are rubbed with the HX-600 straw rubbing machine. During the rubbing process, the cell structure of the corn stalks is destroyed and separated, and some fibers Cells and miscellaneous cells are separated, and the material after kneading is part fibrous straw tissue and part granular straw tissue. The sieve with an aperture of 5mm is used to screen the kneaded material, and the fibrous material (containing a high proportion of Fiber cell) is used for the preparation of lignin fiber, and the granular material (containing a high ...

Embodiment 2

[0016] The corn stalks harvested in the same year were chopped to 3-5 cm using a JL-800 straw grinder. Put the crushed corn stalks into a hydrothermal reactor, add tap water to make the water content about 50%, feed steam to heat to 150°C, and treat for 10min (the treatment intensity is log(10*exp((150-100) / 14.75)=2.47). After the hydrothermally treated corn stalks are centrifugally dehydrated to a water content of about 25%, the corn stalks are rubbed with the HX-600 straw rubbing machine. During the rubbing process, the cell structure of the corn stalks is destroyed and separated, and some fibers Cells and miscellaneous cells are separated, and the material after kneading is part fibrous straw tissue and part granular straw tissue. Use a sieve with an aperture of 10mm to screen the kneaded material, and the fibrous material (containing a high proportion of Fiber cells) are used for the preparation of lignin fibers, and the rubbed granular materials (containing a high propor...

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Abstract

The invention discloses a method for preparing lignin fibers for roads from corn straws, which comprises the following basic steps: carrying out low-intensity hydrothermal pretreatment on corn straws to partially dissociate the connection among cells, separating fibrocytes and impure cells by using a straw kneader, pulping the separated fiber material by a sulfate process to remove lignin and hemicellulose, decolorizing the fibers by using an acidic sodium chlorite solution, drying and pulverizing to obtain the flocculent lignin fibers. By using the agricultural waste corn straws instead of the needle-leaf wood to produce the lignin fibers, the method widens the production raw material range and reduces the environmental pollution sources.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a method for preparing lignin fibers for asphalt roads by using corn stalks. Background technique [0002] Asphalt horseshoe macadam mixture (SMA) is a new type of asphalt mixture that has appeared in the world in recent years. It is composed of asphalt, fiber stabilizer, mineral powder and a small amount of fine aggregate. Asphalt mixture made of coarse aggregate skeleton gaps. As an important part of SMA, fiber not only has the function of absorbing asphalt, but also can play the role of reinforcement and stabilization, which improves the high temperature stability of the mixture to a certain extent. The research results also show that the fiber plays an important role in the performance of the SMA mixture, especially the anti-rutting performance. [0003] Road wood fiber is an indispensable stabilizer in the SMA structure. There are three types of fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H8/00C04B18/24
CPCC04B18/24C08H8/00Y02W30/91
Inventor 徐建李宏强
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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