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Porous multi-hollow flexible composite nanofiber membrane material and preparation method thereof

A technology of composite nanofibers and nanofibers, applied in hollow filament manufacturing, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of uneven dispersion of nanoparticles, reduced long-term performance, and poor fiber adhesion.

Active Publication Date: 2021-07-06
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Titanium dioxide coatings prepared by this method have poor adhesion to carbon fiber substrates, resulting in reduced long-term performance
Chinese patent CN104452268A discloses a method for preparing a fiber composite material loaded with titanium dioxide nanoparticles, but the loading of titanium dioxide in this method is less (4.5%)
Chinese patent CN109346690A prepares carbon fiber in advance, and then attaches zinc oxide to the surface of carbon fiber through hydrothermal reaction as the negative electrode material of lithium ion battery, but the adhesion between zinc oxide and carbon fiber is poor
[0005] It can be seen that in the prior art, metal oxide nanoparticles are directly mixed with fiber materials, but there are still problems of uneven dispersion of nanoparticles, low loading capacity, poor adhesion to fibers or brittle fibers.

Method used

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  • Porous multi-hollow flexible composite nanofiber membrane material and preparation method thereof
  • Porous multi-hollow flexible composite nanofiber membrane material and preparation method thereof
  • Porous multi-hollow flexible composite nanofiber membrane material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0049] Method for preparing a porous multi-hollow flexible composite nanofiber film material, the specific steps are as follows:

[0050] (1) An outer solution of coaxial electrospinning and an inner layer solution of coaxial electrospinning;

[0051] Preparation of an outer solution of coaxial electrostatic spinning: Methyl methacrylate and polypropylene nitrile dissolved in N, N-dimethylformamide under 42 ° C, stirred for 6 h, mix well; wherein polypropylene Nitrile, polymethyl methacrylate and N, N-dimethylformamide mass ratio is 8: 2: 100;

[0052] Preparation of the inner layer of coaxial electrostatic spinning: Under 36 ° C, polymethyl methacrylate is dissolved in N, N-dimethylformamide, stirred for 5 h, then add titanate, stir 0.5 H, mixed uniform; molar ratio of tetrabutyrate and polymethyl methacrylate is 48: 1; polymethyl methacrylate and N, N-dimethylformamide mass ratio of 20: 100;

[0053] (2) In the disposable syringe of the outer solution of coaxial electrospinning ...

Embodiment 2

[0058] Method for preparing a porous multi-hollow flexible composite nanofiber film material, the specific steps are as follows:

[0059] (1) An outer solution of coaxial electrospinning and an inner layer solution of coaxial electrospinning;

[0060] Preparation of outer solution of coaxial electrostatic spinning: Methyl methacrylate and polypropylene nitrile in C, N-dimethylformamide under 25 ° C, stirred for 12 h, mix well; common polypropylene Nitrile, polymethyl methacrylate and N, N-dimethylformamide mass ratio of 11: 5: 100;

[0061] Preparation of the inner layer of coaxial electrostatic spinning: Under 25 ° C, polymethyl methacrylate is dissolved in N, N-dimethylformamide, stirred for 12 h, then titanate tetrabutyl, stirred for 2h , Mixed well; molar ratio of tetrabutyrate and polymethyl methacrylate is 95: 1; polymethyl methacrylate and N, N-dimethylformamide mass ratio of 28: 100;

[0062] (2) In the disposable syringe of the outer solution of coaxial electrospinning an...

Embodiment 3

[0067] Method for preparing a porous multi-hollow flexible composite nanofiber film material, the specific steps are as follows:

[0068] (1) An outer solution of coaxial electrospinning and an inner layer solution of coaxial electrospinning;

[0069] Preparation of outer solution of coaxial electrostatic spinning: Methyl methacrylate and polypropylene nitrile in N, N-dimethylformamide under 15 ° C, stirred for 12 h, mixed uniform; polypropylene Nitrile, polymethyl methacrylate and N, N-dimethylformamide mass of 9: 3: 100;

[0070] Preparation of the inner layer of coaxial electrostatic spun: Under 52 ° C, polymethyl methacrylate is dissolved in N, N-dimethylformamide, stirred for 3 h, then titanate tetrabutyl, stirred for 1 h , Mixed well; molar ratio of tetibutyl titanate and polymethyl methacrylate is 191: 1; polymethyl methacrylate and N, N-dimethylformamide mass ratio of 22: 100;

[0071] (2) In the disposable syringe of the outer solution of coaxial electrospinning and coaxial...

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Abstract

The invention relates to a porous multi-hollow flexible composite nanofiber membrane material and a preparation method thereof. According to the method, a porous multi-hollow flexible composite nanofiber membrane is prepared through coaxial electrostatic spinning, wherein an outer layer solution for coaxial electrostatic spinning consists of a sacrificial high-molecular polymer, a retained high-molecular polymer and a solvent A, and an inner layer solution for coaxial electrostatic spinning is composed of a sacrificial high-molecular polymer, a material capable of generating a substance with semiconductor characteristics and low surface energy in the spinning process, and a solvent B; and then the sacrificial high-molecular polymer in the porous multi-hollow flexible composite nanofiber membrane is removed to obtain the membrane material formed by stacking porous multi-hollow nanofibers, wherein the porous multi-hollow nanofibers are provided with a plurality of hollow pipelines and three-dimensional penetrating through hole micro-nano structures with the hollow surfaces. The membrane material disclosed by the invention has relatively high flexibility and mechanical strength, and the problems of fragility, low mechanical strength and the like of a porous composite fiber material and a single hollow fiber material are solved.

Description

Technical field [0001] The present invention is the technical field of nano-fiber membrane material involves a porous multi-hollow flexible composite nanofiber film material and a preparation method thereof. Background technique [0002] In recent years, nano-fiber membrane materials have been widely used in new energy, sensing, filtration, seawater dilution and aerospace, etc. due to their large specific surface area, high porosity and three-dimensional network structure. China Patent CN101445963A discloses a method of preparing ultrafine polymer fibers using wet electrostatic spinning techniques, and the fiber diameter can be controlled in nanometers to micron. Designing synthetic porous fibers can increase the specific surface area of ​​fibers. Chinese patent CN103225135A The spun liquid composed of a poremetar calcium, a polymer polymer, and a solvent was spunned, and a porous carbon fiber was prepared. Inside the fiber internal design cavity can further increase the specific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/4391D01F1/08D01F1/10D01F9/22D01F9/24D01F9/16
CPCD04H1/728D04H1/4391D01F1/08D01F1/10D01F9/22D01F9/24D01F9/16Y02E60/10
Inventor 张晶晶李光苏正康彭威金俊弘杨胜林
Owner DONGHUA UNIV
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