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Magnetic cellulose-dimethyl imidazole zinc salt and preparing method and application thereof

A technology of dimethylimidazole zinc and dimethylimidazole, which is applied in the field of magnetic cellulose-dimethylimidazole zinc salt and its preparation, can solve the problems of difficult recycling and reuse, loss of enzyme activity, etc., and achieve the benefit of recycling and recycling. Easy to use and operate

Active Publication Date: 2016-06-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using the porous structure of MOF can effectively immobilize enzymes, but because it is difficult to recycle and reuse, the only way to use it will cause loss of enzyme activity. The introduction of magnetic particles makes MOF magnetic, which can be separated and reused by magnets. nicely solve this problem

Method used

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  • Magnetic cellulose-dimethyl imidazole zinc salt and preparing method and application thereof
  • Magnetic cellulose-dimethyl imidazole zinc salt and preparing method and application thereof

Examples

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Effect test

Embodiment 1

[0038] (1) Weigh 2.43gFeCl 3 ·6H 2 O and 0.9gFeCl 2 4H 2 O was dissolved in 300mL distilled water, ammonia water was added dropwise to the solution, and the pH of the solution was adjusted to 10; the mixed solution was reacted at 30°C for 1h to obtain nano-Fe 3 o 4 ; Prepared nano-Fe 3 o 4 It can be stored in Tris-HCl buffer solution with pH=7;

[0039] (2) Weigh 10 mg of microcrystalline cellulose and dissolve it in an aqueous NaOH-Urea solution containing 7% NaOH and 12% Urea by mass at -12°C, wherein the mass ratio of NaOH-Urea solution to cellulose is 1 : 0.02; Add 5 mg of Fe under magnetic stirring conditions 3 o 4 , then add water to the mixed solution to regenerate the cellulose, separate it with a magnet, and wash it three times with distilled water to obtain magnetic cellulose nanocrystals;

[0040] (3) 23.799 mg of zinc nitrate hexahydrate was dissolved in 2 mL of distilled water, mixed with 15 mg of the magnetic cellulose nanocrystals prepared in step (1) a...

Embodiment 2

[0045] (1) Weigh 2.43gFeCl 3 ·6H 2 O and 0.9gFeCl 2 4H 2 O was dissolved in 300mL distilled water, ammonia water was added dropwise to the solution, the pH of the solution was adjusted to 10, and the mixed solution was reacted at 30°C for 1h to obtain nano-Fe 3 o 4 ; Prepared nano-Fe 3 o 4 It can be stored in Tris-HCl buffer solution with pH=7;

[0046] (2) Weigh 10 mg of microcrystalline cellulose and dissolve it in an aqueous NaOH-Urea solution containing 7% NaOH and 12% Urea by mass at -12°C, wherein the mass ratio of NaOH-Urea solution to cellulose is 1 : 0.02, add 10mg of Fe under the condition of magnetic stirring 3 o 4 , then add water to the mixed solution to regenerate the cellulose, separate it with a magnet, and wash it three times with distilled water to obtain magnetic cellulose nanocrystals;

[0047] (3) 23.799 mg of zinc nitrate hexahydrate was dissolved in 2 mL of distilled water, mixed with 20 mg of magnetic cellulose nanocrystals prepared in step (1) a...

Embodiment 3

[0052] (1) Weigh 2.43gFeCl 3 ·6H 2 O and 0.9gFeCl 2 4H 2 O was dissolved in 300mL distilled water, ammonia water was added dropwise to the solution, the pH of the solution was adjusted to 10, and the mixed solution was reacted at 30°C for 1h to obtain nano-Fe 3 o 4 ; Prepared nano-Fe 3 o 4 It can be stored in Tris-HCl buffer solution with pH=7;

[0053] (2) Weigh 10 mg of microcrystalline cellulose and dissolve it in an aqueous NaOH-Urea solution containing 7% NaOH and 12% Urea by mass at -12°C, wherein the mass ratio of NaOH-Urea solution to cellulose is 1 : 0.02, add 15mg of Fe under the condition of magnetic stirring 3 o 4 , then add water to the mixed solution to regenerate the cellulose, separate it with a magnet, and wash it three times with distilled water to obtain magnetic cellulose nanocrystals;

[0054] (3) 23.799 mg of zinc nitrate hexahydrate was dissolved in 2 mL of distilled water, and 25 mg of the magnetic cellulose nanocrystals prepared in step (1) we...

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Abstract

The invention belongs to the technical field of new function materials, and particularly relates to magnetic cellulose-dimethyl imidazole zinc salt and a preparing method and application thereof. Cellulose is dissolved in NaOH-Urea aqueous solution, nanometer Fe3O4 is added while stirring, water is added for regeneration, and product separation and washing are conducted to obtain magnetic cellulose; the magnetic cellulose and zinc nitrate solution are mixed and stirred for 5-30 min, then 2-methylimidazole solution is added for reaction lasting 0.5-24 h while stirring, and the obtained solid is subjected to magnetic separation, washing and drying to obtain the magnetic cellulose-dimethyl imidazole zinc salt. The product can be used as a carrier for enzyme immobilization, can immobilize a series of enzymes including lipase, papain, mung bean epoxide hydrolase and peroxidase, and has the potential to be a carrier of protein drugs.

Description

technical field [0001] The invention belongs to the technical field of new functional materials, and in particular relates to a magnetic cellulose-dimethylimidazolium zinc salt and a preparation method and application thereof. Background technique [0002] MOF is the abbreviation of metal organic framework compound (MetalorgaicFramework). It is a kind of crystalline porous material with a periodic network structure formed by the interconnection of inorganic metal centers (metal ions or metal clusters) and bridging organic ligands through self-assembly. MOF is an organic-inorganic hybrid material, also known as coordination polymer, which is different from both inorganic porous materials and general organic complexes. It has both the rigidity of inorganic materials and the flexibility of organic materials. It presents great development potential and attractive development prospects in modern materials research. [0003] At present, a large number of metal-organic framework...

Claims

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Application Information

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IPC IPC(8): C08L1/04C08K3/22C08K5/3445C12N11/12
CPCC12N9/0006C12N11/12C12Y101/03004C08K3/22C08K5/3445C08K2003/2275C08K2201/01C08L1/04
Inventor 娄文勇徐红曹诗林宗敏华
Owner SOUTH CHINA UNIV OF TECH
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