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Method for producing cellulose protic ionic liquid by using cellulose

A technology of ionic liquid and cellulose, applied in the chemical field, can solve the problems of poor controllability of reaction, severe cellulose degradation, complicated preparation process, etc., and achieve the effect of easy preparation and easy recycling

Active Publication Date: 2018-06-01
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of these two strategies are that the preparation process is complicated, the cellulose degradation is serious, and the reaction controllability is poor.

Method used

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  • Method for producing cellulose protic ionic liquid by using cellulose
  • Method for producing cellulose protic ionic liquid by using cellulose
  • Method for producing cellulose protic ionic liquid by using cellulose

Examples

Experimental program
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Embodiment 1

[0067] Embodiment 1 of the present invention: utilize cellulose to produce the method for cellulose proton type ionic liquid, comprise the steps:

[0068] 1) Use straw cellulose as cellulose, 1,8-diazabicyclo-bicyclo(5,4,0)-7-undecene (DBU) as organic base, and DMSO as aprotic polar Organic solvent, mix 2g cellulose, 2g organic base, and 10g aprotic polar organic solvent;

[0069] 2) Put the mixed system into the autoclave, cover the autoclave, and pass 0.2MPa of CO 2 , at a temperature of 80 °C, sealed with vigorous mechanical stirring for 6 hours, a one-pot reaction was performed to dissolve the cellulose. Obtain clear and transparent CO with cellulose base 2 Solutions of reversible polyionic compounds;

[0070] 3) Under a nitrogen atmosphere, lower the temperature of the reaction mixture to 40°C, add succinic anhydride to the cellulose solution at the same time, the molar ratio of succinic anhydride to cellulose hydroxyl is 1.2:1, raise the temperature to 50°C, Reacted ...

Embodiment 3

[0083] Embodiment 3 of the present invention: according to the step of embodiment 1, take by weighing about 0.6g of microcrystalline cellulose, 0.43g of tetramethylguanidine and about 9g of DMSO (the ratio of the molar number of tetramethylguanidine to the hydroxyl molar number in cellulose) The ratio is 1:1), put them into the autoclave together, cover the autoclave, and pass 0.4MPa of CO 2 , temperature at 40°C, sealed and vigorously mechanically stirred for 3 hours to carry out a one-pot reaction to dissolve cellulose. A clear and transparent cellulose solution was obtained, and the concentration of the cellulose solution was 5% (mass fraction). The temperature was raised to 50° C., and at the same time, 1.6 grams of maleic anhydride was added to the cellulose solution and reacted for 48 hours. After the reaction was completed, the product was precipitated with 4 times the amount of methanol, and vacuum-dried at room temperature for 24 hours.

[0084] The recovery of orga...

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Abstract

The invention discloses a method for producing cellulose protic ionic liquid by using cellulose. Based on existence of organic base, cellulose and CO2 are reacted in order to realize reversible derivatization dissolving, and organic base is used as an effective component for dissolving cellulose and is used as an organic functional catalyst subsequently, in order to catalyze a reaction between cellulose and cyclic acid anhydrides; one step method by using cellulose is used for preparing the cellulose protic ionic liquid; the dissolving processing system has the advantages of cheap price, easypreparation, and easy recycling, and the system has catalysis performance and other characteristics; the method provides good applications to dissolving processing and graft modification of cellulose.

Description

Technical field [0001] The present invention relates to the field of chemical technology, in particular to a method for producing cellulose protonic ionic liquid using cellulose. Background technique [0002] Bioplastics made from plants are attracting attention as new materials that can help alleviate the shortage of oil resources and prevent global warming. As the most abundant biorenewable resource in nature, cellulose has the characteristics of cheapness, biodegradability, easy fiber surface modification, good mechanical properties, low density, and renewable. Making full use of cellulose resources is beneficial to the sustainability of all human society. Development is of great significance (Angewandte Chemie International Edition, 2005, 44(22), 3358–3393). Cellulose is a large polysaccharide composed of glucose. Insoluble in water and general organic solvents. It is the main component of plant cell walls. Cellulose is the most widely distributed and abundant polysa...

Claims

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Application Information

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IPC IPC(8): C08B3/12
CPCC08B3/12
Inventor 谢海波鲁圣军袁超平徐芹芹张丽华
Owner GUIZHOU UNIV
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