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A high specific surface area honeycomb structure-like nanofiber material and its preparation method

A technology with high specific surface area and honeycomb structure, applied in fiber processing, textile and papermaking, coating, etc., can solve the problem of inability to impart unidirectional moisture conduction and moisture absorption and quick drying properties to materials, low specific surface area of ​​through-hole structure fiber materials, and difficult The problem of obtaining a small-sized through-hole structure, etc., achieves the effects of strong controllability of the diameter and thickness of the pore, increased charge density, and promotion of formation.

Active Publication Date: 2021-09-17
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above technologies all use specially designed collection devices to prepare through-hole structure fiber materials, but due to the limitation of the hole size of the collection device, it is difficult to obtain small-sized (pore diameter2 / g), unable to endow the material with excellent unidirectional moisture conductivity and moisture absorption and quick-drying performance

Method used

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  • A high specific surface area honeycomb structure-like nanofiber material and its preparation method
  • A high specific surface area honeycomb structure-like nanofiber material and its preparation method
  • A high specific surface area honeycomb structure-like nanofiber material and its preparation method

Examples

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Effect test

Embodiment 1

[0046] A method for preparing a honeycomb structure nanofiber material with a high specific surface area, the specific steps are as follows:

[0047] (1) First, add MIL-101(Cr) into N,N-dimethylformamide, ultrasonically disperse for 3 hours, then add polyacrylonitrile to the above dispersion, and stir continuously at room temperature for 12 hours with a magnetic stirring device to obtain A uniform and stable mixed solution, wherein polyacrylonitrile accounts for 5% by mass of the mixed solution, MIL-101 (Cr) accounts for 20% by mass of the mixed solution, the viscosity of the mixed solution is 30mPa·s, and the electrical conductivity is 146.4 μS / cm;

[0048] (2) Dry the non-woven fabric in deionized water for 3 minutes. The deionized water can be used as a conductor to eliminate static electricity, remove the residual charge on the surface of the non-woven fabric, and use the non-woven fabric after deionized treatment as the receiving substrate;

[0049] (3) Electrospinning w...

Embodiment 2

[0086] A method for preparing a honeycomb structure nanofiber material with a high specific surface area, the specific steps are as follows:

[0087] (1) First MIL-101(Cr)-NH 2 Add N,N-dimethylformamide, ultrasonically disperse for 4 hours, then add polyacrylonitrile to the above dispersion, and stir continuously for 14 hours with a magnetic stirring device at room temperature to obtain a uniform and stable mixed solution. Among them, polyacrylonitrile The mass percentage of the mixture is 8%, MIL-101(Cr)-NH 2 The mass percentage of the mixed solution is 24%, the viscosity of the mixed solution is 53mPa·s, and the conductivity is 256.4μS / cm;

[0088] (2) Dry the non-woven fabric in isopropanol for 1 minute. Isopropanol can be used as a conductor to eliminate static electricity, remove residual charges on the surface of non-woven fabrics, and use the non-woven fabric after charge-eliminating treatment as a receiving substrate;

[0089] (3) Electrospinning was carried out with...

Embodiment 3

[0092] A method for preparing a honeycomb structure nanofiber material with a high specific surface area, the specific steps are as follows:

[0093] (1) First MIL-101(Cr)-NH 2 Add in deionized water, ultrasonically disperse for 3 hours, then add polyvinyl alcohol into the above-mentioned dispersion, and stir continuously for 12 hours with a magnetic stirring device at room temperature to obtain a uniform and stable mixed solution, wherein the mass percentage of polyvinyl alcohol in the mixed solution is 6%, MIL-101(Cr)-NH 2 The mass percentage of the mixed solution is 24%, the viscosity of the mixed solution is 43mPa·s, and the conductivity is 5079μS / cm;

[0094] (2) Place the electrospun fiber membrane in deionized water for 2 minutes and then dry it. Deionized water can be used as a conductor to eliminate static electricity and remove residual charges on the surface of the electrospun fiber membrane, and use the electrospun fiber membrane after deionization treatment as th...

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Abstract

The invention relates to a high specific surface area honeycomb structure-like nanofiber material and a preparation method thereof. The preparation method is as follows: electrospinning a polymer solution dispersed with nanoscale metal-organic frameworks, and using an insulating material that has undergone charge elimination treatment. As a receiving substrate, a high specific surface area honeycomb structure-like nanofiber material is produced; the final material has a certain thickness and a microscopic three-dimensional honeycomb connected pore structure. The pores are tapered straight pores, and the pore diameter at the large end of the pore is 20 to 100 μm. , the pore diameter at the small end of the channel is 5~25μm, the single fiber is beaded and rough and porous, and the specific surface area is greater than 600m 2 / g. The present invention does not require a template, and can prepare nanofiber materials with a three-dimensional honeycomb connected channel structure in one step, and the prepared honeycomb-like structure nanofiber materials have conical straight channels to achieve rapid directional transmission of water vapor in the thickness direction, and the connected orientation in the hole wall Fiber effectively promotes the horizontal diffusion of moisture and has broad application prospects in the fields of water conduction and dehumidification.

Description

technical field [0001] The invention belongs to the technical field of nanofiber materials, and relates to a honeycomb structure nanofiber material with high specific surface area and a preparation method thereof. Background technique [0002] The fiber materials prepared by traditional electrospinning technology are mostly two-dimensional fiber membranes, and the internal fibers are stacked in random orientation. The use of electrospinning technology to construct nanofibrous materials with a three-dimensional honeycomb interconnected pore structure can effectively reduce the resistance during water vapor transmission, and is expected to greatly improve the water conduction capacity of the material and increase the water capacity. It has broad applications in the fields of water conduction and dehumidification prospect. [0003] The literature [Patterned, highly stretchable and conductive nanofibrous PANI / PVDF strain sensors based on electrospinning and in situ polymerizati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D04H3/02D04H13/00D01D5/00
CPCD01D5/003D01D5/0084D04H1/728D04H3/02D04H13/00D10B2401/022
Inventor 王先锋张宇菲丁彬俞建勇
Owner DONGHUA UNIV
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