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High-specific-surface-area honeycomb-like structure nano fiber material and preparing method thereof

A technology with high specific surface area and honeycomb structure, which is applied in fiber processing, textiles and papermaking, non-woven fabrics, etc., can solve the problem that it is difficult to obtain small-sized through-hole structures, and it is impossible to endow materials with unidirectional moisture-wicking and moisture-absorbing and quick-drying properties. The problem of low specific surface area of ​​porous structure fiber materials can achieve the effect of improving capillary effect, excellent unidirectional moisture conduction and moisture absorption and quick drying performance, and enhancing moisture absorption and moisture conduction performance

Active Publication Date: 2020-08-25
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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  • High-specific-surface-area honeycomb-like structure nano fiber material and preparing method thereof
  • High-specific-surface-area honeycomb-like structure nano fiber material and preparing method thereof
  • High-specific-surface-area honeycomb-like structure nano fiber material and preparing method thereof

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-like structure nano fiber material and a preparing method thereof. The preparing method comprises the steps that a polymer solution in which a nanoscale metal-organic framework is scattered is subjected to electrostatic spinning, an insulating material subjected to charge eliminating treatment serves as a receiving base material, andthe high-specific-surface-area honeycomb-like structure nano fiber material is prepared; and the finally-prepared material has a certain thickness and is of a three-dimensional honeycomb-like communication hole way structure microcosmically, a hole way is a conical direct-through hole way, the big-end hole diameter of the hole way is 20-100 microns, the small-end hole diameter of the hole way is 5-25 microns, single fiber is in a moniliform shape and is rough and porous, and the specific surface area is 600 m<2> / g. According to the high-specific-surface-area honeycomb-like structure nano fibermaterial and the preparing method thereof, a template is not needed, the nano fiber material with the three-dimensional honeycomb-like communication hole way structure can be prepared through one step, the prepared honeycomb-like structure nano fiber material has the conical direct-through hole way so that water vapor can be rapidly transmitted in an oriented manner in the thickness direction, oriented fiber communicating in the hole way effectively promotes horizontal diffusion of water, and wide application prospects are achieved in the fields of water guiding 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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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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