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Preparation method of positively charged ceramic micro-nano fiber membrane

A nanofiber membrane, ceramic microtechnology, applied in the chemical characteristics of fibers, rayon manufacturing, heating/cooling fabrics, etc. The effect of surface electrical properties, high specific surface area, and high porosity

Inactive Publication Date: 2015-12-09
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing a positively charged ceramic micro-nano fiber membrane, which solves the problems that the nanofiber membrane prepared by the existing preparation method is not resistant to high temperature, has a small specific surface area and poor surface electrical properties

Method used

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  • Preparation method of positively charged ceramic micro-nano fiber membrane
  • Preparation method of positively charged ceramic micro-nano fiber membrane
  • Preparation method of positively charged ceramic micro-nano fiber membrane

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preparation example Construction

[0030] The preparation method of the positively charged ceramic micro-nano fiber membrane of the present invention is specifically implemented according to the following steps:

[0031] Step 1, prepare spinning solution

[0032] The spinning solution is composed of solute and solvent, the mass ratio of solvent to solute is 90-60:10-40, the solute is composed of spinnable polymer and ceramic precursor, and the weight ratio of ceramic precursor to spinnable polymer is 35-65 : 65~35, firstly add the spinnable polymer in the solvent, then add the ceramic precursor, stir and age to obtain the spinning solution;

[0033] The solvent is any one of water, ethanol, N, N dimethylformamide; the ceramic precursor is zirconium oxychloride, zirconium nitrate, zirconium chloride, zirconium acetate, yttrium chloride, yttrium nitrate, iron nitrate, nitric acid Any one of ferrous, ferrous chloride, ferric chloride, zinc nitrate, zinc acetate, zinc chloride, magnesium nitrate, magnesium chlorid...

Embodiment 1

[0040] Step 1, first dissolve 3.5g polyvinylpyrrolidone in 90g deionized water, then add 6.5g yttrium chloride, stir and age to obtain spinning solution;

[0041] Step 2, pour the spinning solution obtained in step 1 into a micropump, and use a flattened injection needle as a nozzle for electrospinning to obtain a composite fiber. The spinning voltage is 10kV, the collection distance is 30cm, and the spinning solution advance speed is 0.5 mL / h, the composite fiber is composed of yttrium chloride and polyvinylpyrrolidone;

[0042] Step 3, put the composite fiber obtained in step 2 in N 2 / O 2 (O 2 The volume fraction is 50%) and calcined at 200°C in an atmosphere, and then in N 2 / H2 (H 2 The volume fraction is 10%) and calcined at 400°C for 1h to obtain positively charged Y 2 o 3 micro-nanofibrous membrane.

Embodiment 2

[0044] Step 1, first dissolve 19.5g polyvinyl alcohol in 70g deionized water, then add 10.5g zirconium oxychloride, stir and age to obtain spinning solution;

[0045] Step 2, pour the spinning solution obtained in step 1 into a micropump, and use a flattened injection needle as a nozzle for electrospinning to obtain a composite fiber. The spinning voltage is 40kV, the collection distance is 10cm, and the spinning solution advance speed is 2.5 mL / h, the composite fiber is composed of zirconium oxychloride and polyvinyl alcohol;

[0046] Step 3, put the composite fiber obtained in step 2 in N 2 / O 2 (O 2 The volume fraction is 10%) and calcined at 300°C in an atmosphere, and then in N 2 Calcined at 700 °C for 5 h in the atmosphere to obtain positively charged ZrO 2 micro-nanofibrous membrane.

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Abstract

The invention discloses a preparation method of a positively-charged ceramic micro-nano fiber membrane. The preparation method comprises the steps of adding spinnable polymer in a solvent, then adding a ceramic precursor in the solvent, and obtaining spinning solution after stirring and aging; pouring the spinning solution in a micro pump, adopting an injection needle head which is scraped smoothly as a spray nozzle, and obtaining composite fiber through electrostatic spinning; firstly roasting the composite fiber in anoxic atmosphere at 200-500 DEG C, then roasting the composite fiber in inertia or reducing atmosphere at 400-400 DEG C for 1-5 hours, and obtaining the positively-charged ceramic micro-nano fiber membrane. According to the preparation method of the positively-charged ceramic micro-nano fiber membrane, disclosed by the invention, the positively-charged ceramic micro-nano fiber membrane which is prepared by combining the electrostatic spinning and a step-by-step roasting technology has high porosity, high specific surface area, high surface electrical performance and good high-temperature-resisting and corrosion-resisting performances, has great advantages of separating, shielding and removing bacteria and virus and has a wide application prospect in environment cleaning, pharmaceuticals production, bioengineering, foundation medicine and the like.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and relates to a method for preparing a positively charged ceramic micro-nano fiber membrane. Background technique [0002] Because the size of the virus is very small, about 25-100nm, and there are many types, complex structures, strong variability and infectivity, it is very difficult to isolate or protect the virus. At present, in the field of biomedicine, the isolation and protection methods of viruses mainly include high-temperature treatment, chemical inactivation, physical adsorption and ray radiation, etc., but these methods have a narrow scope of application, high cost, and great damage to the host of the virus. [0003] From the point of view of material science, virus is a kind of charged colloidal particles, most of the viruses in nature are negatively charged, literature (BorregoJJ, CornaxR, PrestonDR, et al.Development and application of new positively charged filters f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/42D04H1/728D01F1/10D06C7/00
Inventor 汤玉斐赵康谢高伟滕乐天
Owner XIAN UNIV OF TECH
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