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A kind of method utilizing imidazole ionic liquid to prepare chitin sphere

An ionic liquid, chitin technology, applied in the production of bulk chemicals, etc., to achieve the effects of non-volatile, simple preparation process and environmental friendliness

Active Publication Date: 2021-04-23
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no method to directly prepare chitin balls from discarded shrimp shells, all of which are prepared from chitin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix 0.05g chitin with a particle size of 60 mesh and 10g 1-ethyl-3-methylimidazolium acetate ([Emim]OAc) evenly, and heat at 80°C for 3 hours to obtain a clear viscous solution, which can be used while hot A syringe with a needle diameter of 0.5mm was dropped in regenerant water, and allowed to stand for 12 hours to regenerate chitin balls. The chitin spheres were washed with distilled water until no ionic liquid remained, and then freeze-dried to obtain chitin spheres with a particle size of about 1 mm.

Embodiment 2

[0018] Mix 0.05g chitin with a particle size of 120 mesh and 10g 1-ethyl-3-methylimidazolium acetate ([Emim]OAc) evenly, and heat at 80°C for 3 hours to obtain a clear viscous solution, which can be used while hot A syringe with a needle diameter of 0.5mm was dropped in regenerant water, and allowed to stand for 12 hours to regenerate chitin balls. The chitin spheres were washed with distilled water until no ionic liquid remained, and then freeze-dried to obtain chitin spheres with a particle size of about 1 mm.

Embodiment 3

[0020] Mix 0.05g chitin with a particle size of 60 mesh and 10g 1-ethyl-3-methylimidazolium acetate ([Emim]OAc) evenly, and heat at 80°C for 3 hours to obtain a clear viscous solution, which can be used while hot A syringe with a needle diameter of 0.5 mm was dropped in regenerating agent ethanol, and allowed to stand for 12 hours to regenerate chitin balls. The chitin spheres were washed with ethanol until no ionic liquid remained, and then freeze-dried to obtain chitin spheres with a particle size of about 0.5 mm.

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Abstract

The invention belongs to the field of renewable resource utilization, and relates to a method for preparing chitin balls by using imidazole ionic liquids, in particular to a method for preparing chitin balls from discarded shrimp shells through a one-step method. After uniformly mixing chitin powder or shrimp shell powder with imidazole ionic liquid, dissolving at a certain temperature for a certain period of time, a clear and translucent ionic liquid / chitin mixed solution is obtained. Drop or extrude the mixed solution into the regeneration agent while it is hot, and after standing for a period of time, chitin balls are obtained. The chitin balls are washed with a regeneration agent until no ionic liquid is left, and the chitin balls are obtained by freeze-drying. The invention uses chitin or waste shrimp shells as raw materials and imidazole ionic liquid as a solvent to prepare chitin spheres in one step. The ionic liquid used is not easy to volatilize, is environmentally friendly, can be recycled, and is economical and environmentally friendly. The prepared chitin balls have a particle diameter of 0.5-5 mm.

Description

technical field [0001] The invention belongs to the field of renewable resource utilization, and relates to a method for preparing chitin balls by using imidazole ionic liquids, in particular to a method for preparing chitin balls from discarded shrimp shells through a one-step method. Background technique [0002] Chitin is the second largest natural polymer after cellulose in nature, and it widely exists in crustacean shells, fungi and cell walls of cells. Chitin has the advantages of good biodegradability, biocompatibility, and antibacterial properties. The chitin spheres prepared from it can be used as chromatography column packing, slow-release materials, and cosmetic materials, which greatly expands its potential. scope of use. However, chitin is insoluble in common solvents due to the presence of a large number of intermolecular and intramolecular hydrogen bonds. Therefore, it is difficult to prepare a chitin solution with a certain concentration at present, and it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/14C08J3/12C08J3/11C08J3/09C08L5/08
CPCY02P20/54
Inventor 吕兴梅冯咪张杰石春艳辛加余侯丹峰张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI