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Nano fiber and preparation method thereof

A nanofiber and cellulose technology, which is applied in the fields of fiber chemical characteristics, cellulose/protein conjugated rayon, rayon manufacturing, etc., can solve the problems of non-antibacterial, toxic to human body, high equipment requirements, etc., and achieve good results Effect of adsorption and antibacterial effect, improved durability, and simple spinning process

Active Publication Date: 2018-11-20
ZETTA NANO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary masks only have general filtering functions, and tiny fine particles can still pass through the mask and enter the nasal cavity, and they do not have antibacterial properties.
Due to the characteristics of small fiber diameter, small pore size, large specific surface area, and high porosity, electrospun nanofibers have broad application prospects in the field of air filtration. However, conventional electrospinning methods need to build a large electric field, which requires equipment Higher, and the solvents used are generally fluorinated or chlorinated solvents, which are toxic to the human body, thus limiting the application of this method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing nanofibers includes the following steps:

[0021] (1) Preparation of nano-silver sol: Weigh a certain amount of silver nitrate and dissolve it in distilled water to obtain solution A, weigh a proper amount of sodium borohydride, dissolve in water, add polyvinylpyrrolidone, stir and mix to obtain a solution B, then heat the prepared silver nitrate solution to 95°C, stir, add solution B to it, stir at constant temperature for 15 minutes, stop heating and stirring, and cool to room temperature naturally;

[0022] (2) Preparation of nano-silica sol: add a certain amount of ethyl silicate to absolute ethanol and water, mix and stir for 20 minutes, then add nitric acid aqueous solution dropwise under stirring, after the addition is complete, reflux and stir for 3 hours, and cool to room temperature ;

[0023] (3) Mix an appropriate amount of nano silver sol with an appropriate amount of nano silica sol;

[0024] (4) Dissolve soy protein and cellulose in DMF an...

Embodiment 2

[0029] A method for preparing antibacterial nanofibers that adsorb particles in the air includes the following steps:

[0030] (1) Preparation of nano-silver sol: Weigh a certain amount of silver nitrate and dissolve it in distilled water to obtain solution A, weigh a proper amount of sodium borohydride, dissolve in water, add polyvinylpyrrolidone, stir and mix to obtain a solution B, then heat the prepared silver nitrate solution to 95°C, stir, add solution B to it, stir at constant temperature for 20 minutes, stop heating and stirring, and cool to room temperature naturally;

[0031] (2) Preparation of nano-silica sol: add a certain amount of ethyl silicate to absolute ethanol and water, mix and stir for 35 minutes, then add nitric acid aqueous solution dropwise under stirring, after the dropwise addition, reflux and stir for 2 hours, and cool to room temperature

[0032] (3) Mix an appropriate amount of nano silver sol with an appropriate amount of nano silica sol;

[0033] (4) Dis...

Embodiment 3

[0038] A method for preparing antibacterial nanofibers that adsorb particles in the air includes the following steps:

[0039] (1) Preparation of nano-silver sol: Weigh a certain amount of silver nitrate and dissolve it in distilled water to obtain solution A, weigh a proper amount of sodium borohydride, dissolve in water, add polyvinylpyrrolidone, stir and mix to obtain a solution B, then heat the prepared silver nitrate solution to 95°C, stir, add solution B to it, stir at constant temperature for 25 minutes, stop heating and stirring, and cool to room temperature naturally;

[0040] (2) Preparation of nano-silica sol: add a certain amount of ethyl silicate to absolute ethanol and water, mix and stir for 30 minutes, then add nitric acid aqueous solution dropwise under stirring, after the dropwise addition, reflux and stir for 2.5 hours, and cool to Room temperature

[0041] (3) Mix an appropriate amount of nano silver sol with an appropriate amount of nano silica sol;

[0042] (4) ...

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Abstract

The invention relates to a nano fiber and a preparation method thereof. A used spinning process is simple; no electric field is used; the diameter of the prepared nano fiber is much less than that ofan electrospun fiber and can be up to 300 to 450 nm. According to the nano fiber and the preparation method thereof, nano-silver sol and nano silicon dioxide sol are added into a spinning solution. Asthe two types of sol has good adsorption and antibacterial effects, the fiber can be endowed with high performance of adsorbing PM2.5 in air and a good sterilization effect; furthermore, the silicondioxide sol and cellulose can form an intermolecular hydrogen bond to a certain extent, which is favorable for improving the durability of the fiber property.

Description

Technical field [0001] The invention belongs to the field of nanofiber materials, and particularly relates to a nanofiber and a preparation method thereof. Background technique [0002] As air pollution becomes more and more serious, the smog phenomenon in various cities is becoming more and more serious. People are paying more and more attention to the impact of air components on the body, including sulfur dioxide, nitrogen oxides and inhalable particulate matter in the air. Item is the main component of smog, the first two are gaseous pollutants, and the last item is particulate matter that aggravates the pollution of smog weather. Ordinary masks only have a general filtering function, tiny fine particles can still pass through the mask and enter the nasal cavity, and they do not have antibacterial properties. Electrospinning nanofibers have the characteristics of small fiber diameter, small pore size, large specific surface area and high porosity, so they have broad applicati...

Claims

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Application Information

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IPC IPC(8): D01F8/02D01F1/10
CPCD01F1/10D01F1/103D01F8/02
Inventor 兰清泉
Owner ZETTA NANO TECH CO LTD