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A kind of preparation method of multi-component network nanofiber film

A nanofiber membrane and nanofiber technology, which is applied in fiber processing, spinning solution preparation, textiles and papermaking, etc., can solve the problems of single network nanofiber structure components, limited practical application performance, poor mechanical strength of fiber membranes, etc. , to expand the functionality, increase the interaction surface area, and reduce the fiber diameter

Active Publication Date: 2016-05-04
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN101838888A discloses the preparation method of electrospun meta-aramid nanofiber, CN101279204A discloses the preparation method of high-strength nanofiber functional film, CN102877152 discloses a kind of aramid fiber 1313 / multi-walled carbon nanotube nanofiber and its preparation method , the above studies have obtained meta-aramid nanofiber materials with rich and diverse shapes to a certain extent, but the prepared meta-aramid nanofibers still have large fiber diameters and uneven distribution, easy slippage between fibers, and mechanical problems. Defects such as poor strength seriously limit its practical application performance
PolymerInternational61 (2012) 1675-1682 article successfully prepared a new type of meta-aramid nanofiber membrane, structure regulation and performance research of electrospun meta-aramid nanofiber (Master's thesis) proposed the use of electrospinning technology to prepare The method for meta-aramid network nanofibers, Chinese patent CN102704028A discloses a method for preparing meta-aramid network nanofiber membranes. Although the above research has prepared meta-aramid network nanofiber materials, it reduces the fiber diameter, but it still has defects such as poor mechanical strength of the fiber membrane, single structural component of the network nanofiber, and insufficient functionality, which seriously limits the practical application of the material.

Method used

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  • A kind of preparation method of multi-component network nanofiber film
  • A kind of preparation method of multi-component network nanofiber film
  • A kind of preparation method of multi-component network nanofiber film

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Embodiment 1

[0029] A method for preparing a high-strength multi-component network nanofiber membrane, the specific steps are:

[0030] Step 1: Add 0.4g of lithium chloride to 14.6g of N,N-dimethylacetamide with magnetic stirring to prepare an ionic liquid solution system, then add 5g of meta-aramid fibers and mix them in an experimental dispersion sand mill at a speed of 5000rpm Medium dispersion and beating for 20 minutes, stirring with a magnetic stirrer at a speed of 100 rpm for 1 hour at 20°C to obtain a homogeneous stable solution (A solution) with mass fractions of meta-aramid and lithium chloride of 25% and 2%, respectively;

[0031] Step 2: Add 1g of polyurethane to 8.9g of N,N-dimethylacetamide and mix evenly, then add 0.1g of silicon oxide nanoparticles with a particle size distribution of 5-30nm for mixing, and use magnetic force under heating at 50°C The stirrer was stirred at a speed of 50 rpm for 5 hours to obtain a homogeneous stable solution (solution B) with a mass fracti...

Embodiment 2

[0035] A method for preparing a high-strength multi-component network nanofiber membrane, the specific steps are:

[0036] Step 1: Add 0.2g of calcium bromide and 0.2g of lithium chloride to 15.6g of N-methylpyrrolidone and magnetically stir to prepare an ionic liquid solution system, then add 4g of meta-aramid fiber and mix and disperse the sand at a speed of 5000rpm Disperse and beat in the mill for 5 minutes, and stir with a magnetic stirrer at a speed of 100 rpm for 10 hours at 80° C. to obtain a homogeneous stable solution (solution A) with mass fractions of meta-aramid and calcium bromide of 20% and 2%, respectively;

[0037] Step 2: Add 1g of polysulfone to 8.95g of N-methylpyrrolidone and mix evenly, then add 0.05g of alumina nanoparticles with a particle size distribution of 8-30nm for mixing, heat in an oil bath at 100°C with a magnetic stirrer Stirring at a speed of 80 rpm for 10 h to obtain a homogeneous stable solution (solution B) with a mass fraction of polysulf...

Embodiment 3

[0041] A method for preparing a high-strength multi-component network nanofiber membrane, the specific steps are:

[0042] Step 1: Add 0.005g of lithium bromide to 3.795g of dimethyl sulfoxide and magnetically stir to prepare an ionic liquid solution system, then add 0.2g of meta-aramid fiber and mix and disperse and beat in an experimental dispersing sand mill at 8000rpm for 10min , stirring with a magnetic stirrer at a speed of 100 rpm for 5 hours at 80° C. to obtain a homogeneous stable solution (solution A) with a mass fraction of meta-aramid and calcium bromide of 5% and 0.1%, respectively;

[0043] Step 2: Add 1.2g of polyethylene oxide to 8.65g of dimethyl sulfoxide solvent and mix evenly, then add 0.1g of silver nanoparticles with a particle size distribution of 30-50nm and 0.05g of silver nanoparticles with a particle size distribution of 40-50nm The silica nanoparticles were mixed, and stirred with a magnetic stirrer at a speed of 120rpm for 20h under heating in an o...

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Abstract

The invention relates to a preparation method for a multi-component net-shaped nanofiber membrane. The preparation method includes the detailed steps that step1, mixing and beating are performed on meta-position aramid fibers, halogen salt and organic solvent by the mass ratio of 1:0.004-0.4:2.996-18.6, and a meta-position aramid fiber solution is prepared through mixing; step2, functionality high-molecular polymers and the solvent are mixed by the mass ratio of 1:5.4-98.99, then nano-particles are added, and heating and mixing are performed to prepare a functionality high-molecular solution, wherein the mass fraction of the nano-particles in the solution is 0.01-5%; step3, the meta-position aramid fiber solution obtained in the step1 and the functionality high-molecular solution obtained in the step2 are mixed by the mass ratio of 1:0.05-0.5 in a dripping mode, and then ultrasonic treatment is performed to obtain a spinning solution; step4, under the conditions of 20 DEG C-30 DEG C indoor temperature and 20-70% relative humidity, the spinning solution is used for electrostatic spinning, and finally the multi-component net-shaped nanofiber membrane with a 5nm-20nm net-shaped nanofiber diameter and reaches over 95% in net-shaped structure coverage rate is obtained. The preparation technology is simple and low in cost, tensile strength of material reaches 100MPa-2000MPa, and the functionality advantage is remarkable.

Description

technical field [0001] The invention relates to a preparation method of a multi-component network nanofiber membrane, which belongs to the technical field of nanomaterials. Background technique [0002] Aramid fiber, carbon fiber and high-strength high-modulus polyethylene fiber, as the three most important high-performance fibers at present, have gradually become hot spots in the field of fiber research. Among them, meso-aramid has been successfully used in many fields such as high-temperature filtration, personal protection, battery isolation film, military aerospace, etc., due to its excellent high temperature resistance, dimensional stability, spinnability, fire resistance and corrosion resistance. middle. Meta-aramid has no melting point due to the limitation of the body structure, and it has been decomposed before melting, so its fiber preparation process is very limited. At present, its preparation processes mainly include dry spinning, wet spinning and dry jet wet s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4382D04H1/728D01D1/02D01D5/00
Inventor 丁彬张世超翟云云毛雪陈坤俞建勇
Owner DONGHUA UNIV
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