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Preparation method of cellulose solution

A cellulose solution and cellulose technology, applied in the direction of organic chemistry, can solve the problems of difficulty in direct dissolution, high cost, pollution, etc., and achieve the effects of simple and easy preparation process, convenient operation and low viscosity

Inactive Publication Date: 2021-03-23
沧州硕金生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Natural cellulose is difficult to dissolve directly due to its internal complex crystal region, amorphous region structure and hydrogen bonds, and now many solvents have problems of high cost and serious pollution. Therefore, green and low-cost fibers prime solvent

Method used

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  • Preparation method of cellulose solution
  • Preparation method of cellulose solution
  • Preparation method of cellulose solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1: a kind of preparation method of cellulose solution

[0050] This embodiment first provides an ionic liquid, and the polymer is prepared by the following method:

[0051] 1) Under the protection of nitrogen, mix N-methylbenzimidazole and propylene bromide with a molar ratio of 1:1.2 evenly, stir vigorously for 4 hours in an ice-water bath, and the stirring rate is 1000r / min, and then 10°C / min The temperature was raised to 60°C to continue the reaction for 14 hours. After the reaction, the substrate was distilled under reduced pressure to remove unreacted allyl bromide, and then the distillate was repeatedly extracted with ether and separated with a separatory funnel to ensure that the product did not contain N- Tolylbenzimidazole, obtained after rotary evaporation to remove residual ether;

[0052] 2) Dissolve 1 mol of potassium acetate in 700 mL of absolute ethanol, slowly add 1 mol of 1-methyl-3-propenyl benzimidazole chloride prepared in step 1), heat t...

Embodiment 2

[0057] Embodiment 2: the preparation method of another kind of cellulose solution

[0058] Example 2 is basically the same as Example 1, except that in Example 2, allyl chloride is replaced by ethyl chloride in the step 1) of preparing the ionic liquid.

Embodiment 3

[0059] Embodiment 3: the preparation method of another kind of cellulose solution

[0060] Example 3 is basically the same as Example 1, except that, in Example 3, the chloropropene in the step 1) of preparing the ionic liquid is replaced by chloropropane.

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Abstract

The invention belongs to the technical field of cellulose solutions, and particularly relates to a cellulose solvent and a method for preparing a cellulose solution by using the cellulose solvent. Theinvention firstly provides an ionic liquid and a preparation method thereof. The ionic liquid is composed of asymmetric organic cations and inorganic anions, anions Cl<-> and acetate (AC<->) can formhydrogen bonds with hydroxyl groups on cellulose molecules through an EDA effect, so that the hydrogen bond effect between the cellulose molecules or in the cellulose molecules is weakened, and thus,dissolution of cellulose is promoted. The invention further provides a preparation method of the cellulose solution, and the cellulose solution prepared from the prepared ionic liquid is high in purity, high in efficiency, green and environmentally friendly, and conforms to the concept of sustainable development.

Description

technical field [0001] The invention belongs to the technical field of cellulose solution, and in particular relates to a cellulose solvent and a method for preparing cellulose solution with it. Background technique [0002] Cellulose is a macromolecular polysaccharide composed of glucose, which is insoluble in water and general organic solvents. It is the main component of plant cell wall. Cellulose is the most widely distributed and most abundant polysaccharide in nature, accounting for more than 50% of the carbon content in the plant kingdom. The cellulose content of cotton is close to 100%, making it the purest natural source of cellulose. In general wood, cellulose accounts for 40-50%, and there are 10-30% hemicellulose and 20-30% lignin. Cellulose has many excellent properties such as renewability, biodegradability, biocompatibility and derivatization. Therefore, various products based on cellulose have been widely used in the modern society with highly developed t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D235/08C08J3/09C08J3/00C08L1/02
CPCC07D235/08C08J3/00C08J3/096C08J2301/02
Inventor 不公告发明人
Owner 沧州硕金生物科技有限公司