Preparation method of one-way wet conduction nano-fiber multilayer composite membrane with wettability gradient

A multi-layer composite membrane, nanofiber membrane technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve the problem of unidirectional water conductivity still needs to be improved, and achieve excellent unidirectional water conductivity, small diameter, and large specific surface area. Effect

Inactive Publication Date: 2017-08-18
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its research direction mainly focuses on the one-way water-conducting performance, and does not pay attention to the reverse waterproof ability of the composite membrane, and the one-way water-conducting performance still needs to be improved, so it is necessary to design a multi-functional, one-way water-guiding and waterproof and moisture-permeable performance. The integrated composite material is of great significance for the theoretical research and practical application of unidirectional moisture transfer

Method used

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  • Preparation method of one-way wet conduction nano-fiber multilayer composite membrane with wettability gradient
  • Preparation method of one-way wet conduction nano-fiber multilayer composite membrane with wettability gradient
  • Preparation method of one-way wet conduction nano-fiber multilayer composite membrane with wettability gradient

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Experimental program
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Effect test

Embodiment 1

[0043] A method for preparing a unidirectional moisture-guiding nanofiber multilayer composite membrane with a wetting gradient, the specific steps are:

[0044] The first step: disperse the hydrophilic fumed silica nanoparticles in water, and ultrasonically disperse the nanoparticles uniformly to obtain a silica dispersion with a mass fraction of 2.5%; dissolve polyvinyl alcohol in the dispersion prepared above Prepare a polyvinyl alcohol electrospinning solution with a mass fraction of 12%, and add glutaraldehyde as a crosslinking agent. The mass fraction of glutaraldehyde in polyvinyl alcohol is 5%, and the spinning solution A1 is obtained by stirring evenly. The silk method deposits a layer of hydrophilic nanofiber film on the nonwoven fabric as the hydrophilic layer, the spinning voltage is 30kV, the receiving distance is 20em, the perfusion speed of the spinning solution is 2mL / h, the diameter of the obtained fiber is 350nm, and the obtained fiber The average pore diamet...

Embodiment 2

[0049] A method for preparing a unidirectional moisture-guiding nanofiber multilayer composite film with a wetting gradient, the preparation method comprising:

[0050] The first step: disperse the hydrophilic nano-calcium carbonate in acetic acid, ultrasonically disperse the nanoparticles evenly, and prepare a calcium carbonate dispersion with a mass fraction of 3%; dissolve chitosan in the above-mentioned dispersion to prepare mass The chitosan electrospinning solution A1 with a fraction of 20% was used to deposit a layer of hydrophilic nanofiber film on glossy paper as a hydrophilic layer by electrospinning. The spinning voltage was 30kV and the receiving distance was 25cm. The perfusion rate was 2 mL / h, the average pore diameter of the obtained fiber membrane was 4 μm, the obtained fiber diameter was 650 nm, and the thickness of the fiber membrane was 30 μm.

[0051] The second step: prepare two kinds of spinning solutions respectively, disperse the hydrophilic nano-calciu...

Embodiment 3

[0055] A method for preparing a unidirectional moisture-guiding nanofiber multilayer composite film with a wetting gradient, the preparation method comprising:

[0056] The first step: disperse the hydrophilic titanium dioxide nanoparticles in N-N dimethylformamide, ultrasonically disperse the nanoparticles uniformly, and prepare a titanium dioxide dispersion with a mass fraction of 0.5%; dissolve the polyimide in the above-mentioned Prepare the polyimide electrospinning solution A1 with a mass fraction of 18% in the prepared dispersion liquid, deposit a layer of hydrophilic nanofiber film on the glossy paper by electrospinning method as the hydrophilic layer, and the spinning voltage is 30kV. The distance is 20cm, the perfusion speed of the spinning solution is 1mL / h, the average pore diameter of the obtained fiber membrane is 1 μm, the obtained fiber diameter is 220nm, and the thickness of the fiber membrane is 25 μm.

[0057]The second step: prepare two kinds of spinning so...

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Abstract

The invention discloses a preparation method of a one-way wet conduction nano-fiber multilayer composite membrane with the wettability gradient. The method comprises the following steps that hydrophilic nano materials are dispersed in solvent, the nano materials are dispersed uniformly through ultrasound, a hydrophilic polymer is dissolved in the dispersing agent, a spinning solution A1 is obtained, and a hydrophilic nano-fiber membrane is deposited on a receiving base material through an electrostatic spinning method; hydrophilic nano materials are dispersed in solvent, the nano materials are dispersed uniformly through the ultrasound, a hydrophilic polymer is dissolved in the dispersing agent, and a spinning solution A2 is obtained; a hydrophobic polymer is dissolved in solvent, and a spinning solution B1 is obtained; the two spinning solutions are deposited on the hydrophilic nano-fiber membrane to form at least one diversion layer through the electrostatic spinning method; a hydrophobic polymer is dissolved in solvent, a spinning solution B2 is obtained, a hydrophobic nano-fiber membrane is deposited on the diversion layers through the electrostatic spinning method, and the one-way wet conduction nano-fiber multilayer composite membrane with the wettability gradient is obtained.

Description

technical field [0001] The invention belongs to the technical field of electrospinning functional fiber materials, and in particular relates to a method for preparing a unidirectional moisture-guiding nanofiber multilayer composite film with a wetting gradient. One-way moisture conductivity, from the hydrophilic layer to the hydrophobic layer has a certain waterproof ability. Background technique [0002] In modern life, people's requirements for clothing are no longer just satisfied with warmth and beauty, and functional fabrics have been valued more and more by people. Applying unidirectional moisture-wicking and waterproof and moisture-permeable properties to textile fabrics can obtain excellent wearing comfort. The unidirectional moisture-conducting nanofiber membrane is the core material of the moisture-conducting functional fabric. Its unidirectional moisture-conducting property is produced by the difference in wettability of the inner and outer layers. Chemical gradi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H13/00D04H1/728
CPCD04H1/728D04H13/00
Inventor 王先锋缪东洋张昕辉丁彬俞建勇
Owner DONGHUA UNIV
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