Preparation method for magnetic cellulose-chitosan composite microsphere

A technology of composite microspheres and cellulose, which is applied to the magnetism of organic materials/organic magnetic materials and the production of bulk chemicals. It can solve problems such as difficult large-scale application and difficult recycling, and achieves simple preparation methods and simple dissolution processes. , Ease of recycling

Active Publication Date: 2013-07-03
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to problems such as recycling difficulties, it is difficult to apply on a large scale

Method used

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  • Preparation method for magnetic cellulose-chitosan composite microsphere
  • Preparation method for magnetic cellulose-chitosan composite microsphere
  • Preparation method for magnetic cellulose-chitosan composite microsphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 0.7g cotton cellulose and 0.35g chitosan to 20g 1-butyl-3-methylimidazolium chloride (bmimCl) solution, heat the solution to 90°C and stir for 2 hours to completely dissolve the cellulose chitosan , a viscous white mixture was obtained. Add 0.35g of iron powder into the above viscous solution, continue to stir and react for 20 minutes, so that the iron powder particles are evenly dispersed in the solution, and then stop stirring. Pour the solution into a 250mL flask while it was hot, then add 100mL of vacuum pump oil and 0.5g of sorbitan oleate and stir at 100°C for 4h. The mechanical stirring rate was 1000rpm. Then it was lowered to room temperature, and deionized water was added dropwise to the above system while stirring, and stirring was continued for 1 h after the dropwise addition was completed to form microspheres. The reacted solution was poured into a 1L beaker and washed 5 times with deionized water by magnetic separation and pouring. The washed microsph...

Embodiment 2

[0028] Add 0.8g of paper pulp and 0.8g of chitosan to 15g of 1-ethyl-3-methylimidazole acetate (EmimOAc) solution, heat the solution to 80°C and stir for 1h to completely dissolve the cellulose chitosan , a viscous white mixture was obtained. 0.8g Fe 3 o 4 Particles were added to the above viscous solution, and the stirring reaction was continued for 20 minutes to make the Fe 3 o 4 The particles are evenly dispersed in the solution, and then the stirring is stopped. Pour the solution into a 250mL flask while it was hot, then add 200mL polyethylene glycol and 0.5g polyoxyethylene abietic acid, stir and react at 90°C for 20min. The mechanical stirring speed is 500rpm. Then it was lowered to room temperature, and ethanol was added dropwise to the above system while stirring, and stirring was continued for 1 h after the dropwise addition was completed to shape the microspheres. The reacted solution was poured into a 1L beaker and washed 5 times with ethanol by magnetic separa...

Embodiment 3

[0033]Add 0.4g microcrystalline cellulose and 1g chitosan to 30g 1-allyl-3-methylimidazolium chloride (AmimCl) solution, heat the solution to 110°C and stir for 0.5h to make the cellulose chitosan Dissolved completely to give a viscous white mixture. Add 0.2g of CoO particles into the above viscous solution, continue to stir and react for 30min, so that the CoO particles are evenly dispersed in the solution, and then stop stirring. Pour the solution into a 250mL flask while it is hot, add 100mL polypropylene glycol and 0.2g diglycerin polypropylene glycol ether, and stir the reaction at 110°C for 20min. The mechanical stirring rate is 2000rpm. Then it was lowered to room temperature, and acetone was added dropwise to the above system while stirring, and the stirring was continued for 2 hours after the dropwise addition was completed to shape the microspheres. The reacted solution was poured into a large beaker and washed 5 times with acetone by magnetic separation and pouring...

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Abstract

The invention specifically relates to a preparation method for a magnetic cellulose-chitosan composite microsphere, which belongs to the field of a natural high polymer material. The preparation method comprises the following steps: with ionic liquid as a solvent, adding cellulose and chitosan into the ionic liquid and carrying out heating and stirring to prepare a cellulose-chitosan/ionic liquid solution; then adding a magnetic inorganic substance particle into the cellulose-chitosan/ionic liquid solution and carrying out mechanical stirring to allow the particle to be uniformly dispersed; and dispersing a magnetic cellulose-chitosan/ionic liquid composite solution obtained after uniform mixing in an organic solution containing an emulsifier, carrying out mechanical stirring until the composite solution is dispersed to form uniform microspheres, adding a curing agent to allow the microspheres to be shaped and carrying out separation to obtain the magnetic composite microsphere. According to the invention, the solvent is nontoxic, safe and environment-friendly; the preparation method is simple and has short process flow; the prepared microsphere has properties like biodegradability and magnetism and can realize functionalization because the surface of the microsphere has an amino group.

Description

technical field [0001] The invention belongs to the field of natural polymer materials, and specifically relates to a preparation method of magnetic cellulose-chitosan composite microspheres. Background technique [0002] Cellulose is the main structural component of plants, and it is also the most abundant and renewable natural organic matter in nature. Chitosan (β-(1→4)-2-amino-2-deoxy-D-glucose) is a natural organic substance second only to cellulose in content. Because cellulose and chitosan have many advantages such as biodegradability, biocompatibility, huge reserves and annual output, easy degradation, no pollution, and easy modification, they have become a research hotspot in the field of polymer materials. [0003] In recent years, with the increasing global environmental pollution and the sharp consumption of non-renewable resources represented by petroleum, the use of renewable resources such as cellulose and other natural polymer materials has become a trend for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/14C08J3/09C08L1/02C08L5/08C08K3/08C08K3/22H01F1/42
CPCY02P20/54
Inventor 刘振王海松牟新东刘超于光王晓燕
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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