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A method for preparing cellulose fiber balls

A technology of cellulose fiber and plant fiber, which is applied in the field of fiber ball preparation, can solve the problems of complex preparation process and organic solvent pollution, and achieve the effects of uniform size distribution, small performance fluctuation, and no need for post-treatment

Active Publication Date: 2019-01-11
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of organic solvent pollution and complicated preparation process in the process of preparing cellulose balls in the traditional method, and propose a method of using cellulose fibers as raw materials to form micron-sized cellulose fibers through mechanical vibration and dialysis. new way of ball

Method used

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  • A method for preparing cellulose fiber balls
  • A method for preparing cellulose fiber balls
  • A method for preparing cellulose fiber balls

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] Dry the bamboo fiber, weigh 500g of the dried sample, wrap it with polyethylene filter paper, place it in an extractor, and use a benzene / ethanol solution with a volume ratio of 2:1 to extract at 70°C for 15 hours to fully remove the wax; After the extraction, take out the sample, soak it with 0.6wt% sodium chlorite solution (pH ≈ 4.1), change the solution every 1.5 hours, repeat five times, fully soak to remove lignin, until the cellulose turns white; Take it out and wash it with clean water, then pour it into 6wt.% KOH solution, soak it at room temperature, and then put it in an oil bath at 80°C for a period of time; put the above sample in a vibration dialysis device, use water as the medium, pass Shock dialysis removes alkali and forms cellulose fiber balls, and finally freeze-drying removes water.

[0033] Adsorption performance test: 1) Weigh a certain amount of cellulose fiber balls, put them into a 250mL Erlenmeyer flask, add a certain concentration of methylene...

example 2

[0035] Dry the straw, weigh 300g of the dried sample, wrap it with polyethylene filter paper, place it in an extractor, and use a toluene / acetone solution with a volume ratio of 1:1 to extract at 80°C for 6 hours to fully remove the wax; After the extraction, take out the sample, soak it with 0.6wt% sodium chlorite solution (pH ≈ 3), change the solution every 2 hours, repeat three times, fully soak to remove lignin until the cellulose turns white; take it out with water After cleaning, pour it into 6wt.% KOH solution, soak it at room temperature, and then place it in an oil bath at 80°C for a period of time; put the above sample in a vibration dialysis device, use water as the medium, and remove it by vibration dialysis Alkali and form cellulose fiber balls, and place them in a blast oven at 60°C for 5 hours to fully dry.

example 3

[0037] Dry the ramie fiber, weigh 620g of the dried sample, wrap it with polyethylene filter paper, place it in an extractor, and use a benzene / ethanol solution with a volume ratio of 2:3 to extract at 70°C for 10 hours to fully remove the wax; After the extraction, the sample was taken out, soaked in 0.6wt.% sodium chlorite solution (pH ≈ 3.5), and the solution was changed every 3 hours, repeated five times, fully soaked to remove lignin, until the cellulose turned white; Take it out, remove the residual sodium chlorite by several times of centrifugation, pour the clean cellulose into 6wt.% KOH solution, soak it at room temperature, and then place it in an oil bath at 80°C for a period of time ; Place the above sample in a shock dialysis device, use water as the medium, remove alkali and cellulose fiber balls through shock dialysis, and freeze dry to remove water.

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Abstract

The invention discloses a method for preparing cellulosic fiber balls. The method comprises the following special steps: extracting plant fibers so as to remove wax; soaking into a sodium chlorite aqueous solution so as to remove lignin; soaking into an alkali solution so as to remove hemicellulose, residual starch and pectin and the like; carrying out shocking dialysis on residual cellulosic fibers so as to remove alkali, and simultaneously forming millimeter-scale cellulosic fiber balls in situ; finally, drying the cellulosic fiber balls so as to remove water, and selectively crosslinking the fiber balls. The method for preparing the cellulosic fiber balls disclosed by the invention is simple in process, and the raw materials are biodegradable, wide in sources, and low in cost, and can be recycled, therefore, the method is a green and environment-friendly production process. Prepared cellulosic fiber balls are in the shape of a regular sphere, 730-1560 m<2> / g in specific surface area and 2-4 mm in particle size, and have a good adsorption effect on water-soluble dyes; through a crosslinking reaction, the prepared cellulosic fiber balls also have a good adsorption effect on oil-soluble dyes.

Description

technical field [0001] The invention belongs to the field of natural polymer materials, and in particular relates to a method for preparing fiber balls. Background technique [0002] In the 21st century, my country's textile industry discharges more than 900 million tons of wastewater every year, and each ton of printing and dyeing wastewater will pollute 20 tons of clean water. Therefore, the treatment of dye wastewater has become a key link that affects the sustainable development of my country's social economy. At present, the methods of dye wastewater treatment mainly include biological method, electrochemical method and adsorption method. Among them, the adsorption method has become the main method of dye wastewater treatment due to its advantages of simple operation, less land occupation and good effect, and the adsorption material is the premise and basis of the adsorption technology. In recent years, the use of natural and renewable biomass resources as raw material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/24C08J3/12
Inventor 马林吴立新王丽丽卓东贤翁子骧
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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