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Preparation method of double-layer one-way moisture-conducting micro-nano fiber membrane based on near-field direct writing and solution electrospinning technology

A technology of micro-nano fiber and unidirectional moisture transfer, which is applied in fiber processing, electrospinning, processing and manufacturing, etc., can solve the problems of large diameter and specific surface area of ​​micro-nano fiber membrane, restriction of unidirectional moisture transfer performance, and small pore size of fiber membrane. Achieve the effect of excellent one-way water guide, high yield and strong capillary force

Active Publication Date: 2021-08-13
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current preparation method of unidirectional moisture transfer membrane mainly adopts the solution electrospinning method. The micro-nano fiber membrane prepared by this method has a small diameter and a large specific surface area, but the pore size of the fiber membrane is small and the structure is uncontrollable, which restricts its use. One-way moisture transfer performance

Method used

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  • Preparation method of double-layer one-way moisture-conducting micro-nano fiber membrane based on near-field direct writing and solution electrospinning technology
  • Preparation method of double-layer one-way moisture-conducting micro-nano fiber membrane based on near-field direct writing and solution electrospinning technology
  • Preparation method of double-layer one-way moisture-conducting micro-nano fiber membrane based on near-field direct writing and solution electrospinning technology

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The first step: disperse the hydrophilic polyacrylonitrile particles in N,N-dimethylformamide, and use a magnetic stirrer to dissolve them fully and uniformly to obtain a polyacrylonitrile electrospinning solution with a mass fraction of 14 wt%. Put it into the spinning syringe A2, clamp the spinning syringe A2 on the sliding table that can move left and right, wrap and fix the silicone oil paper on the receiving plate A4 as the receiving substrate, connect the high-voltage power supply A3 to the needle of the spinning syringe A2, Turn on the syringe pump A1, use the electrospinning device to deposit a layer of disordered hydrophilic micro-nano fiber film A on the silicone oil paper by the solution electrospinning method, the spinning voltage is 15kV, the receiving distance is 20cm, the spinning solution The propulsion speed is 2mL / h, the obtained fiber diameter is 980nm, and the thickness of the hydrophilic micro-nano fiber membrane A is 15 μm;

[0040]Step 2: Put the ...

Embodiment 2

[0043] The first step: disperse the hydrophilic polyacrylonitrile powder in N,N-dimethylformamide, and use a magnetic stirrer to dissolve it fully and uniformly to obtain a polyacrylonitrile electrospinning solution with a mass fraction of 14 wt%. Put it into the spinning syringe A2, clamp the spinning syringe A2 on the sliding table that can move left and right, wrap and fix the silicone oil paper on the receiving plate A4 as the receiving substrate, connect the high-voltage power supply A3 to the needle of the spinning syringe A2, Turn on the syringe pump A1, use the electrospinning device to deposit a layer of disordered hydrophilic micro-nano fiber film A on the silicone oil paper by the solution electrospinning method, the spinning voltage is 30kV, the receiving distance is 20cm, and the spinning solution The propulsion speed is 2mL / h, the obtained fiber diameter is 980nm, and the thickness of fiber membrane A is 15 μm;

[0044] Step 2: Put the hydrophobic polycaprolacton...

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Abstract

The invention discloses a preparation method of a double-layer one-way moisture-conducting micro-nano fiber membrane based on a near-field direct writing and solution electrospinning technology. The preparation method comprises the following steps of (1) preparing a layer of disordered hydrophilic micro-nano fiber membrane A through a solution electrospinning method; and (2) carrying out melt spinning by using melt direct writing equipment, and preparing an inner-layer hydrophobic micro-nano fiber membrane B on the hydrophilic micro-nano fiber membrane A. On the basis of solution electrostatic spinning, melt direct-writing spinning is added, so that accurate control over the pore size of the fiber membranes is facilitated, the topological structures of the fiber membranes can be constructed by printing preset grid patterns, then the requirement for permeation of liquid drops with different diameters is met, and the moisture absorption efficiency is improved. The micro-nanofiber membrane with an excellent one-way moisture guiding function can be prepared by combining the solution electrostatic spinning and the melt direct-writing spinning, the moisture absorption rate is adjusted, and the one-way moisture guiding performance of the micro-nano fiber membrane is further improved. The composite fiber membrane has a huge application prospect in the aspects of sportswear, paper diapers and medical dressings.

Description

technical field [0001] The invention belongs to the technical field of functional micro-nano composite fiber materials, and specifically relates to a preparation method of a double-layer unidirectional moisture-guiding micro-nano fiber membrane based on near-field direct writing and solution electrospinning technology. Background technique [0002] With the development of social economy, people's demand for a better life is fully reflected in clothing. More and more consumers prefer functional clothing, among which unidirectional moisture-wicking fabrics and clothing are gradually attracting attention. One-way moisture-wicking fabric is a functional textile that absorbs moisture quickly and dries quickly. It usually has a difference in wettability between hydrophilic and hydrophobic in the thickness direction. The outer layer of the one-way moisture-wicking fabric is hydrophilic and the inner layer is hydrophobic. It is transmitted to the hydrophilic outer layer of the fabri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/4374D01D5/00B29C64/106B33Y10/00
CPCD04H1/728D04H1/4374D01D5/003B29C64/106B33Y10/00
Inventor 杜磊杨柳徐淮中
Owner ZHEJIANG SCI-TECH UNIV
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