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Method for producing super wet fabric

A fabric and supercritical technology, applied in non-woven fabrics, textiles and papermaking, fiber types, etc., can solve problems such as high cost, complex process, damage to mechanical properties of fabrics, etc., to achieve wide applicability, simple operation, extended functions and effect of use

Active Publication Date: 2018-01-26
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of the above method is relatively complicated, and it is difficult to prepare large-scale
Some methods use harmful chemicals for treatment, which are costly and environmentally unfriendly
In addition, these methods often cause damage to the mechanical properties of the fabric

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for producing super wet fabric
  • Method for producing super wet fabric
  • Method for producing super wet fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The electrospinning method is used to prepare PVP non-woven fabrics. The preparation process conditions are: use ethanol as the solvent, the concentration of the spinning solution: 25wt%, the voltage: 20KV, the distance between the injection needle and the receiving plate: 10cm, and the obtained hydrophilic The fiber diameter of the electrospun non-woven fabric of permanent polymer is 1~2μm, and the diameter of the hole formed by the overlapping of fibers in the nonwoven fabric is 5~20μm.

[0032] Put the prepared PVP non-woven fabric into the autoclave, under the supercritical CO with a pressure of 12MPa and a temperature of 30°C 2 Soak in medium for 30min, and then quickly reduce the pressure (pressure release rate: 8MPa / s), foam the PVP fiber, and manufacture PVP fiber with nanopores. The water contact angle test shows that before and after the non-woven fabric is foamed, the contact angle changes from 45° to almost completely spread, realizing superhydrophilicity ( ...

Embodiment 2

[0035] The electrospinning method is used to prepare PMMA nonwoven fabrics. The preparation process conditions are: using dichloromethane as a solvent, spinning solution concentration: 15wt%, voltage: 20KV, distance between the injection needle and the receiving plate: 15cm, the obtained The fiber diameter of the hydrophobic polymer electrospun non-woven fabric is 1-5 μm, and the diameter of the hole formed by the fiber lap in the non-woven fabric is 2-20 μm.

[0036] Put the prepared PMMA non-woven fabric into the autoclave, under the pressure of 15MPa, the temperature is 100 ℃ supercritical CO 2 Soak in medium for 60min, and then quickly reduce the pressure (pressure release rate: 7MPa / s), foam the PMMA fibers, and produce PMMA fibers with nanopores. The water contact angle test shows that before and after the non-woven fabric is foamed, the contact angle changes from 90° to 160°, realizing superhydrophobicity ( figure 2 ).

Embodiment 3

[0038] Put the purchased PP non-woven fabric into the high-pressure reactor, under the pressure of 15MPa, the temperature is 130℃ supercritical CO 2 Soak in medium for 120min, and then quickly reduce the pressure (pressure release rate: 7MPa / s), foam the PP fiber, and produce PP fiber with nanopores. The water contact angle test shows that before and after the non-woven fabric is foamed, the contact angle changes from 100° to 153°, realizing superhydrophobicity ( image 3 ).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention provides a method for producing a super wet fabric. The production method aims at fabrics formed by various hydrophilic or hydrophobic thermoplastic polymer fibers, and a supercritical CO2 foaming technology is used to make a micrometer and nanometer multistage microstructure on the surface of the polymer fibers in order to make the fabric have a super wet performance. The foamed fabric has superhydrophilicity or superhydrophobicity and other super wet performances, so the functions and the uses of the fabric are greatly expanded. The method using the supercritical CO2 foaming technology has the advantages of greenness, environmental protection, simplicity in operation, and realization of the regulation of the morphology of the surface nanostructure of the fibers through regulating the pressure, the temperature, the soaking time and the pressure relief mode. The method is suitable for various thermoplastic polymer fabrics and has wide applicability.

Description

technical field [0001] The invention relates to the technical field of functionalized polymer fibers, in particular to a method of using supercritical CO 2 Foaming is a method of preparing thermoplastic polymer fabrics with special micron and nanostructures on the fiber surface and superwetting properties. Background technique [0002] The self-cleaning effect of lotus leaves has attracted widespread attention in recent years. It has been found that the micro- and nano-structured wax on the surface of lotus leaves is the reason for its super-hydrophobic properties, and a Cassie model of micro-nano structures has been established accordingly. Many studies have shown that hydrophilic materials with surface micro-nano hierarchical structures exhibit superhydrophilic properties, while hydrophobic materials exhibit super-hydrophobic properties. Based on this, various physical and chemical methods such as plasma etching, mechanical friction, chemical etching, and chemical modific...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D06M23/00D04H1/728D06M101/18D06M101/26D06M101/32D06M101/34D06M101/28D06M101/20
Inventor 邱守季谢普容敏智章明秋
Owner SUN YAT SEN UNIV
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