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Preparation method of wood liquefied product spinning solution

A spinning solution and wood technology, applied in the chemical characteristics of fibers, textiles and papermaking, single-component polyurethane rayon, etc., can solve the problems of high pollution and strong pungent odor of phenol, and achieve high wood utilization, Low temperature range, the effect of increasing added value

Inactive Publication Date: 2015-06-24
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In China, there have been reports of using phenol as a liquefaction agent to prepare wood liquefaction spinning solution through a one-step synthesis method. However, phenol has a strong pungent smell, and a large amount of formaldehyde is used as a synthesis agent during the synthesis process, which is more polluting.

Method used

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  • Preparation method of wood liquefied product spinning solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 Preparation of wood liquefaction spinning solution

[0026] Grind the wood through a 80-mesh sieve (mesh diameter 0.20mm) wood powder, dry the wood powder and its 1.5 times the weight of polyethylene glycol (PEG400) and glycerol polyol mixture (polyethylene glycol and propylene glycol) The weight ratio of triols is 7:3) and mixed, and at the same time, add sulfuric acid with a concentration of 72% as a catalyst (the amount of sulfuric acid added is 5% of the weight of polyols) to a three-necked flask, and place it in an oil bath with a preheating value of 150°C , install the condensing device, start the agitator (rotating speed 120rpm), carry out wood liquefaction, liquefaction time 60min, obtain the stock solution of wood liquefaction.

[0027] Add 40% dimethylformamide according to the weight ratio of the wood liquefaction stock solution for dilution, place it in a blast drying oven, and dry it at 105°C for 12 hours to remove moisture. Then add carbodiim...

Embodiment 2

[0028] Embodiment 2 Preparation of wood liquefaction spinning solution

[0029] Grind the wood through a 60-mesh sieve (mesh diameter 0.30mm), dry the wood powder and its 2 times the weight of polyethylene glycol (PEG1000) and glycerol polyol mixture (polyethylene glycol and propylene glycol) The weight ratio of triols is 7:3) and mixed, and at the same time, add sulfuric acid with a concentration of 72% as a catalyst (the amount of sulfuric acid added is 5% of the weight of the polyol) into the three-necked flask, and place it in an oil bath with a preheating value of 150°C In the process, the condensing device was installed, and the stirrer was started (rotating speed 120rpm) to carry out wood liquefaction, and the liquefaction time was 60min to obtain a liquefied product.

[0030] Add 40% dimethylacetamide according to the weight ratio of the wood liquefaction stock solution for dilution, place it in a blast drying oven, and dry it at 105°C for 12 hours to remove moisture. ...

Embodiment 3

[0031] Embodiment 3 Preparation of wood liquefaction spinning solution

[0032] Wood is ground into wood powder with a 40-mesh sieve (mesh diameter 0.20mm), and after drying, the wood powder is mixed with a polyol mixture of polyethylene glycol (PEG400) and glycerin (polyethylene glycol and glycerin) twice its weight. The weight ratio of triols is 7:3) and mixed, and at the same time, add sulfuric acid with a concentration of 72% as a catalyst (the amount of sulfuric acid added is 3% of the weight of polyols) into a three-necked flask, and place it in an oil bath with a preheating value of 150°C In the process, the condensing device was installed, and the stirrer was started (rotating speed 120rpm) to carry out wood liquefaction, and the liquefaction time was 60min to obtain a liquefied product.

[0033] Add 40% dimethyl sulfoxide according to the weight ratio of the wood liquefaction stock solution for dilution, then place it in a blast drying oven, and dry it at 105°C for 12...

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Abstract

The invention provides a preparation method of a wood liquefied product spinning solution. The preparation method comprises the following steps of: mixing a solid-state wood biomass material which is difficult to dissolve with a polyhydric alcohol; liquefying a mixture into a solubilized wood material with reaction activity under an acidic catalysis condition; and adding a synthesizing agent to react under a certain condition to generate a spinning solution capable of being drew. According to the preparation method, the defects in a wood fiber material preparation technology are overcome and the utilization rate of the material is improved; the spinning solution is used for spinning a carbon fiber precursor so that the dependence on fossil fuel resources by a carbon fiber industry is relieved, the whole comprehensive utilization performance of wood is improved, and the additional values of the biomass material including the wood are greatly improved. Compared with an existing wood liquefaction technology, the preparation method disclosed by the invention has the characteristics of high liquefaction efficiency, low liquefaction temperature, no toxin and no harm, environmental friendliness, low fusion and spinning temperature range and the like, and spinning is easy and convenient to control.

Description

technical field [0001] The invention relates to wood liquefaction technology, in particular to a preparation method of wood liquefaction spinning solution. Background technique [0002] Agricultural and forestry biomass materials represented by wood are derived from photosynthesis and are rich in resources. They are the only natural renewable natural materials among traditional materials. With the depletion of fossil resources, the complex process of refining fossil materials and environmental pollution, biomass resources have gradually become an important substitute. Since wood is an insoluble natural polymer, a certain size greatly limits the application range of wood. Using wood liquefaction technology, wood can be converted into a reactive and fluid liquid in the presence of certain organic matter or catalysts, so that it can be used as a chemical raw material. Through the liquefaction of wood, the liquefied wood is chemically prepared into a spinning solution, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/64C08H8/00D01F6/70D01F9/24
Inventor 张文博
Owner BEIJING FORESTRY UNIVERSITY
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