Preparation method for multi-component net-shaped nanofiber membrane

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...

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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

Polymer International61 (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 A method for preparing 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 However, there are still defects such as poor mechanical strength of the fiber membrane, single component of the network nanofiber structure, and insufficient functionality, which seriously limit the practical application of this material.

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