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Nanofiber as well as preparation method and application thereof

A technology of nanofiber and cellulose acetate, which is applied in the field of nanomaterials, can solve the problems of slow detection speed and low detection sensitivity, and achieve the effects of shortening detection time, high detection sensitivity and improving detection efficiency

Inactive Publication Date: 2021-08-24
宽诚科技(武汉)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing related technologies, the detection sensitivity for organic phosphorus substances and organic chlorine substances in pesticides is low, and the detection speed is slow

Method used

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  • Nanofiber as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: the preparation of nanofiber

[0038] A kind of nanofiber, the raw material component of preparing nanofiber comprises: 0.3g cellulose acetate, 0.1g p-hydroxybenzoic acid and 3mL solvent (solvent is made of acetone and N,N-dimethylformamide according to volume ratio is 2:1 proportion composition).

[0039] The preparation method of above-mentioned nano fiber, comprises the following steps:

[0040] Mix cellulose acetate, p-hydroxybenzoic acid and solvent, heat and stir, the temperature of heating and stirring is 100°C, the stirring speed of heating and stirring is 1000 rpm, and the time of heating and stirring is 1 hour, and the electrospinning solution is prepared, and then The electrospinning equipment is used for spinning. The working parameters of the electrospinning equipment are: the needle tip voltage is 20kV, the receiving plate voltage is -1kv, the receiving distance is 20cm, and the injection rate of the electrospinning solution is 0.5mL / h. fib...

Embodiment 2

[0042] Embodiment 2: the preparation of nanofiber

[0043] A kind of nanofiber, the raw material component of preparing nanofiber comprises: 0.2g cellulose acetate, 0.1g p-hydroxybenzoic acid and 3mL solvent (solvent is by volume ratio 1:1 by acetone and N,N-dimethylformamide proportion composition).

[0044] The preparation method of above-mentioned nano fiber, comprises the following steps:

[0045] Mix cellulose acetate, p-hydroxybenzoic acid and solvent, heat and stir, the temperature of heating and stirring is 105°C, the stirring speed of heating and stirring is 1000 rpm, and the time of heating and stirring is 1.5 hours, and the electrospinning solution is obtained, and then The electrospinning equipment is used for spinning. The working parameters of the electrospinning equipment are: the needle tip voltage is 22kV, the receiving plate voltage is -1.5kv, the receiving distance is 18cm, and the injection rate of the electrospinning solution is 0.4mL / h. Nanofibers.

Embodiment 3

[0046] Embodiment 3: the preparation of nanofiber

[0047] A kind of nanofiber, the raw material component of preparing nanofiber comprises: 0.4g cellulose acetate, 0.1g p-hydroxybenzoic acid and 4mL solvent (solvent is made of acetone and N,N-dimethylformamide according to volume ratio is 2:1 proportion composition).

[0048] The preparation method of above-mentioned nano fiber, comprises the following steps:

[0049]Mix cellulose acetate, p-hydroxybenzoic acid and solvent, heat and stir, the temperature of heating and stirring is 95°C, the stirring speed of heating and stirring is 1100 rpm, and the time of heating and stirring is 1 hour, and the electrospinning solution is prepared, and then The electrospinning equipment is used for spinning. The working parameters of the electrospinning equipment are: the needle tip voltage is 20kV, the receiving plate voltage is -1kv, the receiving distance is 22cm, and the injection rate of the electrospinning solution is 0.5mL / h. fiber...

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Abstract

The invention belongs to the field of nano materials, and discloses a nanofiber as well as a preparation method and application thereof. The nanofiber is prepared from the following raw material components: cellulose acetate, a functional material and a solvent, wherein the functional material contains phenolic hydroxyl and carboxyl. The cellulose acetate, the functional material and the organic solvent are mixed, heated and stirred to prepare an electrospinning solution, and then electrospinning equipment is used for spinning to prepare the nanofiber. The nanofiber prepared from the cellulose acetate and the functional material has the characteristic of high detection sensitivity for pesticides, especially organophosphorus substances or organochlorine substances. After a serum sample to be detected is subjected to adsorption purification treatment, the interference of other impurities in the serum sample on the detection of the organophosphorus substances and the organic chlorine substances can be eliminated or greatly reduced, the detection sensitivity on the organophosphorus substances and the organic chlorine substances is greatly improved, and the detection efficiency is also improved.

Description

technical field [0001] The invention belongs to the field of nanomaterials, in particular to a nanofiber and its preparation method and application. Background technique [0002] Pesticide poisoning incidents are not uncommon, and the problem of pesticide residues has also attracted public attention. Therefore, it is very necessary to detect the types and contents of toxic substances in a timely, accurate and rapid manner. Moreover, with the increase of the types of samples to be tested and the improvement of the detection sensitivity and efficiency of pesticide residues, it is necessary for high-sensitivity and rapid detection The need for analytical techniques is also increasing. [0003] In the existing related technologies, the detection sensitivity for organic phosphorus substances and organic chlorine substances in pesticides is low, and the detection speed is relatively slow. [0004] Therefore, it is necessary to provide a new detection method for organophosphorus ...

Claims

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Application Information

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IPC IPC(8): D01F2/28D01F1/10D01D5/00G01N33/15
CPCD01F2/28D01F1/10D01D5/003G01N33/15
Inventor 刘虎军
Owner 宽诚科技(武汉)有限公司
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