Preparation method and application of magnetic silicon-coated yeast grafted polyethyleneimine biological composite material

A polyethyleneimine, composite material technology, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., to achieve the effect of enhancing adsorption performance, improving yield, magnetic stability performance and thermal stability

Inactive Publication Date: 2014-03-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, branched polyethyleneimine (PEI) was used as a water-soluble polymer functional monomer, and CP was used as a coupling agent to graft the PEI functional monomer onto the silicon-coated magnetic yeast matrix material to prepare magnetic silicon-coated yeast. Yeast is grafted with polyethylenimine biocomposites and used for the adsorption of cerium and strontium ions in solution. This research has not been reported yet

Method used

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  • Preparation method and application of magnetic silicon-coated yeast grafted polyethyleneimine biological composite material
  • Preparation method and application of magnetic silicon-coated yeast grafted polyethyleneimine biological composite material
  • Preparation method and application of magnetic silicon-coated yeast grafted polyethyleneimine biological composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) MYSiO 2 Preparation of -Cl:

[0040] Weigh 0.5g of yeast, activate it in 60 mL of normal saline (0.9% sodium chloride solution) at 35°C for 60 minutes; centrifuge to collect the thick yeast suspension and mix with 0.1g Fe 3 o 4 The nanoparticles were mixed and ultrasonicated for 5 minutes; the mixture was poured into a 250 ml three-neck flask, and 100 ml of toluene liquid was added under the condition of mechanical stirring; the mixed toluene solution was ventilated with nitrogen, and 1 ml of triethylamine and 3 ml of 3-chloropropyltrimethoxysilane; then react at 85°C for 9 hours, collect and separate the product with a permanent magnet, and wash it repeatedly with acetone, methanol and deionized water in sequence, and dry the product at 40°C.

[0041] (2) MYSiO 2 - Preparation of PEI:

[0042] Weigh 0.3g of the magnetic yeast-coated silicon product and place it in a 100ml three-neck flask; pipette 0.6g of polyethyleneimine and dissolve it in 60ml of deionized w...

Embodiment 2

[0049] (1) MYSiO 2 Preparation of -Cl:

[0050] Weigh 0.5g of yeast and activate it in 50 mL of normal saline (0.8% sodium chloride solution) at 35°C for 50 minutes; centrifuge to collect about thick yeast suspension and mix with 0.05g Fe 3 o 4 Nanoparticles were mixed and ultrasonicated for 1 minute; the mixture was poured into a 250 mL three-necked flask, and 80 mL of toluene liquid was added under mechanical stirring; the mixed toluene solution was ventilated with nitrogen, and after 10 minutes, 0.8 mL of triethylamine and 2 mL of 3-Chloropropyltrimethoxysilane; then react at 80°C for 10 hours, collect and separate the product with a permanent magnet, and wash it repeatedly with acetone, methanol and deionized water in sequence, and dry the product at 40°C.

[0051] (2) MYSiO 2 - Preparation of PEI:

[0052] Weigh 0.2 g of the magnetic yeast-coated silicon product and place it in a 100 ml three-neck flask; pipette 0.3 g of polyethyleneimine and dissolve it in 60 ml of d...

Embodiment 3

[0054] (1) MYSiO 2 Preparation of -Cl:

[0055] Weigh 0.5g of yeast and activate it in 70 mL of normal saline (1% sodium chloride solution) for 70 minutes at 35°C; centrifuge to collect about thick yeast suspension and mix with 0.15 g Fe 3 o 4 Nanoparticles were mixed and ultrasonicated for 10 minutes; the mixture was poured into a 250 mL three-neck flask, and 120 mL of toluene liquid was added under mechanical stirring; the mixed toluene solution was ventilated with nitrogen, and after 20 minutes, 1.2 mL of triethylamine and 4 mL of 3-Chloropropyltrimethoxysilane; then react at 90°C for 11 hours, collect and separate the product with a permanent magnet, and wash it repeatedly with acetone, methanol and deionized water in sequence, and dry the product at 40°C.

[0056] (2) MYSiO 2 - Preparation of PEI:

[0057] Weigh 0.4 g of the magnetic yeast-coated silicon product and place it in a 100 ml three-neck flask; pipette 1.2 g of polyethyleneimine and dissolve it in 60 ml of d...

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Abstract

The invention belongs to the technical field of environmental function material preparation and relates to a preparation method of a magnetic silicon-coated yeast grafted polyethyleneimine biological composite material for adsorptive separation of cerium ions and strontium ions. According to the technical scheme, the preparation method comprises the following steps: at first, ultrasonically mixing activating yeasts with magnetic nanoparticles, and reacting the mixture with triethylamine and 3-chloropropyl trimethoxysilane in a methylbenzene system to prepare magnetic silicon-coated yeasts; then, adding polyethyleneimine as a functional monomer, producing a substitution reaction of chlorine groups on the surfaces of the magnetic silicon-coated yeasts with a polyethyleneimine solution, and grafting polyethyleneimine onto the surfaces of the magnetic silicon-coated yeasts to prepare the biological composite material. According to the method, the yield of a matrix material is increased; a prepared adsorbent overcomes the deficiency of low mechanical strength of a conventional biological material, is good in magnetic responsibility, can achieve quick separation, is higher in adsorption capacity and adsorption kinetics performance, and can achieve the purpose of quick and efficient adsorptive separation of the cerium ions and the strontium ions.

Description

technical field [0001] The invention relates to a magnetic silicon-encapsulated yeast grafted polyethyleneimine biological composite material, in particular to a preparation method of a magnetic silicon-encapsulated yeast grafted polyethyleneimine biological composite material which absorbs and separates cerium ions and strontium ions, and belongs to the technical field of environmental functional material preparation. Background technique [0002] Biological materials are widely sourced, cheap, and have unique natural morphology and structure, especially microbial cells, which have great potential as biological templates for the preparation of micro-nano functional materials due to their advantages of low price and environmental friendliness. Yeast, as an important class of industrial microorganisms, is widely used in food, beverage and other fermentation industries, but its weak points such as low mechanical strength, easy clogging, and difficult collection and separation l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 欧红香卞维柏潘建明吴才玉黄卫红朱亚梅
Owner JIANGSU UNIV
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