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Method for preparing cellulose fiber using ion liquid as solvent

A technology of cellulose fibers and ionic liquids, applied in spinning solution preparation, fiber treatment, textiles and papermaking, etc., can solve the problems of strong corrosion and volatility of solvents, reduce production costs, shorten process flow, and facilitate recycling Effect

Inactive Publication Date: 2006-10-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing cellulose fibers using ionic liquid as a solvent, so as to make up for the strong corrosiveness and volatility of the solvent used when the cellulose fibers in the prior art are spun by solution. Defects that cause serious environmental pollution and meet the needs of production and life

Method used

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  • Method for preparing cellulose fiber using ion liquid as solvent
  • Method for preparing cellulose fiber using ion liquid as solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix the pulverized wood pulp and ionic liquid evenly, and dissolve it at 90°C for 24 hours to form a uniform and stable spinning stock solution. The concentration of the spinning stock solution is 5%. The spinning stock solution is filtered and defoamed before wet spinning , the coagulation bath is an aqueous solution of [BMIM]Cl (the Chinese name is 1-butyl-3-methylimidazolium chloride), the concentration of the ionic liquid in the coagulation bath is 10%, and the temperature is 30°C.

[0028] The spinning speed is 10m / s, and the solidified fiber is processed by washing, stretching, oiling, drying and other procedures to obtain a cellulose fiber with a strength of 5.8cN / dtex.

Embodiment 2

[0030] Mix the pulverized bamboo pulp and ionic liquid evenly, and dissolve it for 100 hours at 50°C to form a uniform and stable spinning stock solution. The concentration of the spinning stock solution is 35%, and the spinning stock solution is filtered and defoamed for melt-blown wet spinning , the coagulation bath is [AMIM]Cl (Chinese name 1-propenyl-3-methylimidazolium chloride) ionic liquid aqueous solution, the concentration of the ionic liquid in the coagulation bath is 50%, and the coagulation bath temperature is 90°C.

[0031] The spinning speed is 8m / s, and the solidified fiber is processed by washing, stretching, oiling, drying and other procedures to obtain a cellulose fiber with a strength of 4.3cN / dtex.

Embodiment 3

[0033] Mix the pulverized cellulose acetate pulp and ionic liquid evenly, and dissolve it for 1 hour at 150°C to form a uniform and stable spinning stock solution. The concentration of the spinning stock solution is 20%, and the spinning stock solution is filtered and defoamed before spinning. Silk, the coagulation bath is [BMIM]Br (Chinese name 1-butyl-3-methylimidazolium bromide) ionic liquid aqueous solution, the concentration of the ionic liquid in the coagulation bath is 5%, and the coagulation bath temperature is 0°C.

[0034] The spinning speed is 15m / s, and the coagulated fiber is processed by washing, stretching, oiling, drying and other procedures to obtain a cellulose fiber with a strength of 2.3cN / dtex.

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Abstract

The invention discloses the method of producing the fibrin fiber by the ion liquid, the producing process includes the below steps: the crushed fibrin and the ion liquid are mixed evenly, the melting time keeps 1-100 hour under the temperature of 50-150 degree, the even steady filature original liquid is formed, the thickness of the filature original liquid is 5_35%; the filature original liquid is sifted and take off the doff to spin the silk, the freezing bath is composed of the water or the water and the ion, the thickness of the ion liquid in the freezing bath is 0-50%, the temperature is 0-90 degree. The conducing effect of the invention is showed below: the adopted solution is ion liquid which has the innocuity, volatility and the favor of protecting the condition and the health of the handling personnel; the melting point of the ion liquid has the wide range. so it is favor of controlling the temperature in the temperature range of the aggregation and the filature; the freezing reagent is composed of the water or the compound of the water and the ion liquid, it is the healthy solution and can protect the condition; the ion liquid has many merits such as the without volatility, the reclaiming easy, the falling of the cost, saving the resource and the energy and the improved producing efficiency.

Description

technical field [0001] The invention relates to a method for preparing cellulose fibers, in particular to a method for preparing cellulose fibers using ionic liquid as a solvent. Background technique [0002] Cellulose is a renewable resource that is ubiquitous in nature. Trees, cotton, rice stalks, corn and other plants and some bacterial secretions contain a lot of cellulose. Cellulose fibers may become a renewable resource to replace petroleum-based fibrous products. At present, the production of cellulose fiber mainly uses sodium hydroxide, acetone, carbon disulfide, etc. as solvents and additives, and the cellulose used needs to be yellowed, aged and matured, and it also involves formaldehyde, sulfite, sodium sulfide, sulfuric acid And chemical reagents such as zinc sulfate, all of the above-mentioned organic reagents are volatile, causing serious pollution to the environment and endangering the health of operators; and inorganic reagents are highly corrosive, which i...

Claims

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Application Information

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IPC IPC(8): D01D1/02D01D5/00
Inventor 王华平刘崴崴张玉梅王彪
Owner DONGHUA UNIV
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