Nanofiber composite membrane and preparation method thereof

A nanofiber and fiber membrane technology, applied in the field of spinning, can solve problems such as poor tensile strength of nanofiber composite membranes, and achieve the effect of low energy consumption

Inactive Publication Date: 2015-06-24
ZHEJIANG WEIXING IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The experimental results show that the tensile strength of the nanofiber composite membrane prepared by melt blown spinning is poor, only 2MPa~3MPa

Method used

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  • Nanofiber composite membrane and preparation method thereof
  • Nanofiber composite membrane and preparation method thereof
  • Nanofiber composite membrane and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0052] The invention provides a kind of preparation method of nanofiber composite membrane, comprises the following steps:

[0053] Dissolving the high-melting-point polymer in the spinning solvent to obtain a high-melting-point polymer spinning solution;

[0054] Melting the low-melting polymer to obtain a melt of the low-melting polymer;

[0055] The melting point difference between the high melting point polymer and the low melting point polymer is not less than 10°C;

[0056] Electrospinning the resulting spinning solution of the high melting point polymer to obtain an electrospun high melting point polymer fiber membrane;

[0057] The melt of the obtained low-melting-point polymer is melt-blown and spun to obtain a melt-blown and spun low-melting-point polymer fiber film;

[0058] The obtained electrospun high-melting-point polymer fiber membrane and the melt-blown low-melting-point polymer fiber membrane are combined and hot-pressed to obtain a nanofiber composite membra...

Embodiment 1

[0114] Dry PVDF-HFP powder in a vacuum oven at 100°C for 12h, cool to room temperature, dissolve 150g of dried PVDF-HFP powder in a mixed solvent of 850g of acetone and DMF, stir at room temperature for 12h, and then add 1g of Nano-titanium dioxide particles, after ultrasonically dispersing the obtained mixed solution for 6 hours, obtain PVDF-HFP spinning solution, and set aside;

[0115] Dry PVDF powder in a vacuum oven at 100°C for 12h, cool to room temperature, dissolve 120g of dried PVDF powder in 880g of N,N-dimethylacetamide and acetone mixed solvent, and stir at room temperature for 12h to obtain PVDF Spinning solution, spare;

[0116] The viscosity of the PVDF-HFP spinning solution was measured, and the measured viscosity was 5.1Pa s; at a room temperature of 25°C and a relative air humidity of about 40%, the PVDF-HFP spinning solution was electrospun, and during the electrospinning process , forming each stable Taylor cone feeding (adding) liquid at a rate of 1.5mL / h...

Embodiment 2

[0129] After vacuum drying PVDF, PVDF-HFP, PE and PP at 100°C for 12 hours, put them in a desiccator for later use;

[0130] Dissolve 150g of vacuum-dried polyvinylidene fluoride-perfluoropropylene copolymer (PVDF-HFP) powder in a mixed solvent of 255g DMF and 595g acetone, and stir and dissolve at room temperature 25°C for 12h to form a uniform and transparent solution. PVDF-HFP spinning solution, spare;

[0131] Dissolve 120g of vacuum-dried polyvinylidene fluoride (PVDF) powder in a mixed solvent of 264g DMF and 616g of acetone, stir and dissolve at room temperature 25°C for 12h to form a uniform and transparent solution, and obtain PVDF spinning solution for subsequent use;

[0132] The viscosity of the above PVDF spinning solution was measured, and the measured viscosity was 4.9 Pa s. At a room temperature of 25°C and a relative air humidity of about 40%, the injection speed of the plastic injection pump was distributed during the electrospinning process of the PVDF spinn...

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Abstract

The invention provides a preparation method of a nanofiber composite membrane. The method includes the steps that a spinning solution and melt of a high-melting-point polymer are provided, a spinning solution and melt of a low-melting-point polymer are provided, and the melting point difference of the high-melting-point polymer and the low-melting-point polymer is not smaller than 10 DEG C; the spinning solution of the high-melting-point polymer and the spinning solution of the low-melting-point polymer are subjected to electrostatic spinning, and accordingly an electrostatic spinning high-melting-point polymer fiber membrane and an electrostatic spinning low-melting-point polymer fiber membrane are obtained; the low-melting-point polymer melt and the high-melting-point polymer melt are subjected to melt-blowing spinning, so that a melt-blowing spinning low-melting-point polymer fiber membrane and a melt-blowing spinning high-melting-point polymer fiber membrane are obtained; the melt-blowing spinning high-melting-point polymer fiber membrane and the electrostatic spinning low-melting-point polymer fiber membrane undergo composite hot pressing, or the melt-blowing spinning low-melting-point polymer fiber membrane and the electrostatic spinning high-melting-point polymer fiber membrane undergo composite hot pressing, and thus the nanofiber composite membrane is obtained. The nanofiber composite membrane has high tensile strength which reaches up to 22 MPa-32 MPa.

Description

technical field [0001] The invention relates to the technical field of spinning, in particular to a nanofiber composite membrane and a preparation method thereof. Background technique [0002] The diameter of nanofibers is nanoscale, and the length is microns, millimeters or even longer. The extremely high aspect ratio makes it easy to make products in various forms such as wires, felts, and films. It is more flexible and convenient to use, and still Preserve the properties of nanomaterials. [0003] With the advancement of science and technology and the improvement of the quality of life, the performance requirements of the membrane are getting higher and higher. Nanofiber membranes have excellent properties such as large specific surface area, high porosity, light weight, and easy combination with nano-sized active substances. performance has received increasing attention. Nanofibrous membranes have a wide range of applications in tissue engineering scaffolds, sensor per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/542D04H1/728
Inventor 陈国贵宋学礼
Owner ZHEJIANG WEIXING IND DEV
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