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Silver-loaded copper ferrite magnetic nanometer composite fiber and preparation method and application thereof

A technology of magnetic nano and composite fibers, which is applied in botany equipment and methods, fiber treatment, fiber chemical characteristics, etc. It can solve the problems of large specific surface, difficulty in achieving antibacterial effect, high density, etc., and achieve short cycle time and low raw material price. Inexpensive and wide range of raw materials

Inactive Publication Date: 2011-08-17
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the reports of silver-loaded inorganic antibacterial agents, most of them use porous materials such as silica, hydroxyapatite, alumina, and titania as carriers, but for the application Ferrite composite oxides are rarely reported as silver carriers. Copper ferrite CuFe2O4 composite oxides have good adsorption, catalytic performance and magnetic response. The magnetic separation method can be used to separate and recover conveniently and quickly. At present, there have been studies on the adsorption of As (Ⅴ) by copper ferrite, the removal of the dye acid red B, the adsorption of CO2, and the catalytic decomposition. , have achieved the ideal effect; however, the disadvantage of copper ferrite due to its high density limits its application in some fields, especially in the preparation of antibacterial materials as Ag ionophores. Due to the limitation of the loading capacity, it is difficult to achieve the ideal antibacterial effect, and the copper ferrite fiber is expected to overcome this shortcoming. The copper ferrite fiber prepared by this patent application using the organogel pyrolysis method has the advantages of being porous and having a large specific surface, which is conducive to the loading of silver. In addition, It is also beneficial to the good magnetic properties of copper ferrite, which can realize the separation, recovery and reuse of antibacterial agents

Method used

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  • Silver-loaded copper ferrite magnetic nanometer composite fiber and preparation method and application thereof
  • Silver-loaded copper ferrite magnetic nanometer composite fiber and preparation method and application thereof
  • Silver-loaded copper ferrite magnetic nanometer composite fiber and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 (silver-loaded copper ferrite fiber):

[0026] Step 1: get 3.588g copper nitrate (Cu(NO 3 ) 2 ·3H 2 O), 12.000g iron nitrate (Fe(NO 3 ) 3 .9H 2 O), 14.512g citric acid (CA:C 6 h 8 o 7 ·H 2 O), mixed in 400ml deionized water, Cu 2+ The molar concentration of Fe is 0.0371mol / L, Fe 3+ The molar concentration is 0.0743mol / L, and the raw material molar ratio is: CA: Fe 3+ :Cu 2+ =4.5:2:1, and then magnetically stirred for 24 hours.

[0027] Step 2: Then put the precursor solution into a vacuum rotary evaporator, decompress at 70°C, the pressure is about 0.05Mpa, and dehydrate for about 45 minutes to obtain a gel colloid.

[0028] Step 3: Put the gel obtained in step 2 into an oven, dry and dehydrate at 60°C, and place it in the oven for about 1 hour, then pull the gel into gel cellulose filaments, and the cellulose filaments Dry in a crucible at 100°C.

[0029] Step 4: Heat the fiber precursor to 800°C at a heating rate of 3°C / min in an air at...

Embodiment 2

[0031] Embodiment 2 (silver-loaded copper ferrite fiber):

[0032] Step 1: get 2.392g copper nitrate (Cu(NO 3 ) 2 ·3H 2 O), 8.000g ferric nitrate (Fe(NO 3 ) 3 .9H 2 O), 8.9465g citric acid (CA:C 6 h 8 o 7 ·H 2 O), mixed in 300ml deionized water, Cu 2+ The molar concentration of Fe is 0.0330mol / L, Fe 3+ The molar concentration is 0.0660mol / L, and the raw material molar ratio is: CA: Fe 3+ :Cu 2+ =4.3:2:1, and then magnetically stirred for 24 hours.

[0033] Step 2: Then put the precursor solution into a vacuum rotary evaporator, depressurize at 70°C, the pressure is about 0.05Mpa, and dehydrate for about 45 minutes to obtain a gel colloid.

[0034] Step 3: Put the gel obtained in step 2 into an oven, dry and dehydrate at 60°C, and place it in the oven for about 1 hour, then pull the gel into gel cellulose filaments, and the cellulose filaments Dry in a crucible at 100°C.

[0035] Step 4: Heat the fiber precursor to 500°C at a heating rate of 3°C / min in an air...

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Abstract

The invention discloses a sliver-loaded copper ferrite magnetic nanometer composite fiber and a preparation method and application thereof and relates to the technical field of inorganic nonmetallic materials and preparation thereof. The preparation method comprises the following steps of: performing chemical reaction on citric acid, copper nitrate and ferric nitrate which serve as raw materials to prepare precursory sol; decompressing and dehydrating to obtain precursory gel with certain viscosity; spinning to obtain gel cellulose fiber; calcining the obtained gel cellulose fiber at appropriate temperature and air atmosphere to obtain an objective product CuFe2O4 hollow fiber; loading sliver on the obtained CuFe2O4 fiber by an immersion method; and drying and calcining at a certain temperature and air atmosphere to obtain Ag / Cu Fe2O4 nanometer composite fiber. The preparation method has the advantages of simplicity, low requirements on equipment, low cost, short operation cycle and the like; and the Ag / Cu Fe2O4 fiber is obtained by loading silver by the immersion method, and the prepared fiber has high antibacterial activity and long service life. As the carrier CuFe2O4 has certain magnetism, the fiber can be recycled possibly.

Description

technical field [0001] The invention relates to the field of inorganic non-metallic materials, in particular to a silver-loaded copper ferrite magnetic nanocomposite fiber, a preparation method thereof and an application in the antibacterial field. Background technique [0002] Antibacterial agents are divided into inorganic antibacterial agents, organic antibacterial agents and natural antibacterial agents; compared with organic antibacterial agents and natural antibacterial agents, inorganic antibacterial agents have the advantages of high safety, good long-term effect, low cost, etc., and have excellent heat resistance properties, making it the preferred antibacterial agent used in plastics, chemical fibers, ceramics, home appliances, medical materials, food packaging and other materials; inorganic antibacterial agents generally contain metal ions such as silver, zinc, copper, etc. Loaded in some inorganic carrier structures or between surface layers, it has the effect of...

Claims

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Application Information

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IPC IPC(8): D06M11/83D01F9/10A01N59/20A01P3/00
Inventor 林琳许明强张海方沈湘黔
Owner JIANGSU UNIV
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