Hemicellulose-based hydrogel based on eutectic solvent as well as preparation method and application of hemicellulose-based hydrogel

A deep eutectic solvent and hemicellulose technology, applied in the production of bulk chemicals, etc., can solve the problems of long process flow, energy consumption, lack of functionality, etc., and achieve the effect of simplifying the preparation process and broadening the scope of application

Pending Publication Date: 2022-07-05
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many methods of using hemicellulose to prepare hydrogels in the literature. At present, it is usually grafted and modified. This method has problems such as complicated process, long process flow, energy consumption and lack of functionality.
Due to the defects of polydispersity, high degree of branching and amorphous structure of hemicellulose, its solubility is limited, which limits its application to a certain extent.

Method used

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  • Hemicellulose-based hydrogel based on eutectic solvent as well as preparation method and application of hemicellulose-based hydrogel
  • Hemicellulose-based hydrogel based on eutectic solvent as well as preparation method and application of hemicellulose-based hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Mix choline chloride and imidazole according to the molar ratio of 3:7, then heat up to 80 °C in magnetic stirring and dissolve for 4 hours to obtain a clear solution, freeze-dry to obtain choline chloride / imidazole deep eutectic solvent for subsequent use ;

[0019] 2) Drying the hemicellulose in a blast drying oven to remove moisture to obtain dry hemicellulose for later use;

[0020] 3) Mix the dry hemicellulose described in step 2) with the choline chloride / imidazole deep eutectic solvent prepared in step 1), raise the temperature to 80 °C in magnetic stirring and fully dissolve to obtain hemicellulose and low The hemicellulose-deep eutectic solvent mixture with a mass-to-volume ratio of the eutectic solvent of 35 mg / mL;

[0021] 4) Combine acrylamide, N,N′-methylenebisacrylamide and 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone with deionized Mixing with water, the concentration of acrylamide in the obtained solution is 5.6 mol / L, and the concen...

Embodiment 2

[0023] 1) Mix choline chloride and oxalic acid in a molar ratio of 1:1, then heat up to 100 °C in magnetic stirring to dissolve for 5 hours to obtain a clear solution, and freeze-dry to obtain a choline chloride / oxalic acid deep eutectic solvent spare;

[0024] 2) Drying the hemicellulose in a blast drying oven to remove moisture to obtain dry hemicellulose for later use;

[0025] 3) Mix the dry hemicellulose described in step 2) with the choline chloride / oxalic acid deep eutectic solvent prepared in step 1), raise the temperature to 100 °C in magnetic stirring and fully dissolve to obtain hemicellulose and low A hemicellulose-deep eutectic solvent mixture with a mass-to-volume ratio of eutectic solvent of 25 mg / mL;

[0026] 4) Combine acrylamide, N,N′-methylenebisacrylamide and 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone with deionized Mixing with water, the concentration of acrylamide in the obtained solution is 5.6 mol / L, and the concentration of N,N′-met...

Embodiment 3

[0028] 1) Mix choline chloride and lactic acid in a molar ratio of 1:10, then heat up to 60 °C in magnetic stirring to dissolve for 5 hours to obtain a clear solution, and freeze-dry to obtain a choline chloride / lactic acid deep eutectic solvent spare;

[0029] 2) Drying the hemicellulose in a blast drying oven to remove moisture to obtain dry hemicellulose for later use;

[0030] 3) Mix the dry hemicellulose described in step 2) with the choline chloride / oxalic acid deep eutectic solvent prepared in step 1), raise the temperature to 100 °C in magnetic stirring and fully dissolve to obtain hemicellulose and low A hemicellulose-deep eutectic solvent mixture with a mass-to-volume ratio of eutectic solvent of 25 mg / mL;

[0031] 4) Combine acrylamide, N,N′-methylenebisacrylamide and 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone with deionized Mixing with water, the concentration of acrylamide in the obtained solution is 5.6 mol / L, and the concentration of N,N′-met...

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Abstract

The invention discloses a hemicellulose-based hydrogel based on a deep eutectic solvent and a preparation method and application thereof, and the preparation method comprises the following steps: mixing choline chloride with imidazole / urea / oxalic acid / lactic acid, then heating and stirring until a clear solution is obtained, and freeze-drying to obtain the deep eutectic solvent; mixing the dried hemicellulose with the eutectic solvent, heating, stirring and dissolving to obtain a hemicellulose-eutectic solvent mixed solution; and mixing a monomer, a cross-linking agent and a photoinitiator, fully and uniformly mixing the hemicellulose-eutectic solvent mixed solution, pouring the mixture into a quartz culture dish, and carrying out ultraviolet-initiated polymerization to obtain the hemicellulose-based hydrogel based on the eutectic solvent. The eutecticevaporate solvent is molten salt composed of a hydrogen bond donor and a hydrogen bond acceptor, the hydrogel can be endowed with the functions of conductivity, water loss resistance and the like, and the application range of the hemicellulose-based hydrogel is greatly widened.

Description

technical field [0001] The invention belongs to the technical field of bio-based polymer material preparation, and in particular relates to a hemicellulose-based hydrogel based on a low eutectic solvent and a preparation method and application thereof. Background technique [0002] With the depletion of traditional fossil energy sources such as coal, oil and natural gas and the serious environmental problems caused by the exploitation and use process, the use of renewable biomass resources as raw materials to prepare bio-based polymer materials has become a research topic for today's scientific researchers. focus. [0003] As the second largest natural polysaccharide after cellulose, hemicellulose is an ideal source for the production of xylo-oligosaccharides, bioethanol and biochemicals due to its good biocompatibility and biodegradability. It can be processed as a polymer material to prepare membrane materials and hydrogels for biomedicine, packaging and other fields. ...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08L5/14C08L33/26C08F220/56C08F222/38C08F2/48
CPCC08J3/075C08F220/56C08F2/48C08J2305/14C08J2433/26C08F222/385Y02P20/54
Inventor 张代晖谢宜彤储富祥王春鹏高士帅蹇均宇
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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