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Preparation method of nano cobweb fiber membrane

A fiber membrane and spider web technology, applied in the field of nanomaterials, can solve the problems of difficult to meet fine filtration, low filtration efficiency, large resistance pressure drop, etc.

Active Publication Date: 2021-06-22
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the diameters of fibers produced by conventional electrospinning are mostly distributed in hundreds of nanometers, which are not real nanomaterials. There are still problems such as low filtration efficiency and large resistance pressure drop, which is difficult to meet the needs of fine filtration.

Method used

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  • Preparation method of nano cobweb fiber membrane
  • Preparation method of nano cobweb fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] S1. Dissolve polyvinylpyrrolidone in absolute ethanol (the mass ratio of polyvinylpyrrolidone to ethanol solvent is 1:4), and stir at 400r / min at room temperature (2h) to obtain a colorless and transparent solution A.

[0020] S2. Add acetic acid to solution A (volume ratio of ethanol to acetic acid is 10), then slowly add isopropyl titanate (mass ratio to polyvinylpyrrolidone is 2.7) as a titanium source, and stir evenly at 300r / min ( After 6h), a light yellow and transparent spinning solution was obtained.

[0021] S3. Under the condition of humidity of 47~53% and temperature of 28±2℃, put two 2ml spinning solutions into two 5ml syringes respectively, use double-needle spinning, and use non-woven fabric as receiving For the base material, the injection speed is set to 0.5ml / h, the working voltage is adjusted to 11kv, the receiving distance is set to 17cm, the receiving speed is 60r / min, and the translation speed is 100mm / min. The spinning time is 1.5h, and a sheet wi...

Embodiment 2

[0024] S1. Dissolve polyvinylpyrrolidone in absolute ethanol (mass ratio of polyvinylpyrrolidone to ethanol solvent is 1:5), and stir at room temperature at 400r / min (2h) to obtain a colorless and transparent solution A.

[0025] S2. Add acetic acid to solution A (volume ratio of ethanol to acetic acid is 15), then slowly add isopropyl titanate (mass ratio to polyvinylpyrrolidone is 2.9) as a titanium source, and stir evenly at 300r / min ( 8h) to obtain a light yellow and transparent spinning solution.

[0026] S3. Under the condition of humidity of 47~53% and temperature of 28±2℃, put two 2ml spinning solutions into two 5ml syringes respectively, use double-needle spinning, and use non-woven fabric as receiving For the base material, the injection speed is set to 1.5ml / h, the working voltage is adjusted to 12kv, the receiving distance is set to 25cm, the receiving speed is 80r / min, and the translation speed is 100mm / min. The spinning time is 1.5h, and a sheet with a thickness...

Embodiment 3

[0029] S1. Dissolve polyvinylpyrrolidone in absolute ethanol (the mass ratio of polyvinylpyrrolidone to ethanol solvent is 1:7), and stir at 400r / min at room temperature (2h) to obtain a colorless and transparent solution A.

[0030] S2. Add acetic acid to solution A (volume ratio of ethanol to acetic acid is 10), then slowly add isopropyl titanate (mass ratio to polyvinylpyrrolidone is 2.8) as a titanium source, and stir evenly at 300r / min ( After 6h), a light yellow and transparent spinning solution was obtained.

[0031] S3. Under the condition of humidity of 47~53% and temperature of 28±2℃, put two 2ml spinning solutions into two 5ml syringes respectively, use double-needle spinning, and use non-woven fabric as receiving For the base material, the injection speed is set to 1ml / h, the working voltage is adjusted to 20kv, the receiving distance is set to 20cm, the receiving speed is 100r / min, and the translation speed is 100mm / min. The spinning time is 1.5h, and a sheet wit...

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Abstract

The invention discloses a preparation method of a nano cobweb fiber membrane, and particularly relates to a preparation method of a titanium dioxide / polyvinylpyrrolidone nano cobweb fiber membrane. The preparation method comprises the following steps of dissolving a template agent polyvinylpyrrolidone in absolute ethyl alcohol to obtain an organic polymer template, then adding isopropyl titanate as a titanium source, and adding acetic acid as an isopropyl titanate hydrolysis inhibitor in the process to obtain a spinning raw material stock solution; and adding the spinning stock solution into an electrostatic spinning device for electrostatic spinning, and preparing the titanium dioxide / polyvinylpyrrolidone nano cobweb fiber membrane. The preparation method disclosed by the invention is simple in process, the prepared titanium dioxide / polyvinylpyrrolidone fiber membrane has a nano cobweb structure, and compared with a common electrostatic spinning fiber membrane, the titanium dioxide / polyvinylpyrrolidone fiber membrane is smaller in fiber diameter, smaller in pore diameter and higher in porosity. The method has a good application prospect in the fields of air filtration and catalytic degradation of pollutants.

Description

technical field [0001] The invention relates to a preparation method of a nano-spider fiber membrane, in particular to a preparation process of a titanium dioxide / polyvinylpyrrolidone nano-spider fiber membrane, and belongs to the technical field of nanometer materials. Background technique [0002] With the rapid development of industrialization and urbanization in our country, the problem of air pollution is still an important issue that seriously affects people's pursuit of a happy and better life, and has caused irreversible damage to people's health. Therefore, how to effectively control the problem of particle pollution in the atmosphere is a major issue related to people's livelihood. Traditional filter materials are manufactured based on glass fiber or melt-blown non-woven fabrics, which have a good filtering effect on particles above the micron level, but poor filtration efficiency on sub-micron or even nano-sized particles, and there are Therefore, it is necessary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00D01F6/44D01F1/10
CPCD04H1/728D01D5/003D01F6/44D01F1/10
Inventor 谭杰松罗蓉仲慧朱晓晓公衍民仲兆祥邢卫红
Owner NANJING UNIV OF TECH