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Continuous preparation method and system of non-woven fabric

A preparation system and non-woven fabric technology, applied in non-woven fabrics, rayon manufacturing, textiles and papermaking, etc., can solve problems such as inability to achieve high stretch, inability to continuously prepare graphene non-woven fabrics, weak interaction force, etc.

Active Publication Date: 2021-02-19
HANGZHOU GAOXI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the precursor graphene oxide is a two-dimensional polymer, there is no polymer-like chain entanglement in the spinning solution, the interaction between the sheets is weak, and the draw ratio is extremely small, usually less than 30%. Stable high stretch cannot be achieved; and because the wet-spun fiber is extremely fragile, the spinning speed must be extremely low and the coagulation bath is not disturbed during the spinning process, so the graphene oxide solution cannot achieve a high speed similar to a polymer solution or melt Spinning, making it impossible to efficiently prepare graphene fibers and non-woven fabrics
Moreover, since wet spinning can only be used, it is impossible to stably, continuously and evenly disperse graphene oxide fibers to the substrate, so it is impossible to continuously prepare graphene non-woven fabrics.

Method used

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  • Continuous preparation method and system of non-woven fabric
  • Continuous preparation method and system of non-woven fabric
  • Continuous preparation method and system of non-woven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 Shown, a kind of continuous preparation system of nonwoven fabric comprises a guide roll 102, a take-up roll 103, a coagulation liquid coating device 104, an air-assisted spinning device 105; and, a base 101, from the described The guide roller 102 moves toward the take-up roller 103 . In this embodiment, the substrate is a PTFE membrane.

[0036] In this embodiment, the coagulation liquid coating device 104 is an existing spraying device, and sprays the coagulation liquid on the substrate 101, and the coagulation liquid is ethanol.

[0037] In this embodiment, the air-assisted spinning device 105 uses coaxial needles to perform air-assisted spinning on the ultra-high drawing solution, the models of the inner and outer needles are 18G and 15G respectively, and the fiber-forming line speed of the air-assisted spinning is 350 m / min, the spinning solution is prepared by the following steps:

[0038] (1) A graphene oxide aqueous solution with a concentra...

Embodiment 2

[0043] Such as figure 2 As shown, a continuous preparation system for non-woven fabrics includes a guide roll 102, two take-up rolls 103, a coagulation solution coating device 104, an air-assisted spinning device 105, and an infrared lamp 106; and, a The substrate 101 moves from the guide roller 102 to the take-up roller 103 . In this embodiment, the substrate is a PTFE membrane.

[0044] In this embodiment, the coagulation liquid coating device 104 is an existing spraying device, and sprays the coagulation liquid on the substrate 101, and the coagulation liquid is isopropanol.

[0045] In this embodiment, the air-assisted spinning device 105 uses coaxial needles to perform air-assisted spinning on the ultra-high drawing solution. The models of the inner and outer needles are 18G and 15G respectively, and the fiber-forming line speed of the air-assisted spinning is 100 m / min, the spinning solution is prepared by the following steps:

[0046](1) A graphene oxide aqueous sol...

Embodiment 3

[0053] Such as image 3 Shown, a kind of continuous preparation system of nonwoven fabric comprises a guide roll 102, a take-up roll 103, a coagulation solution coating device 104, an air-assisted spinning device 105; and, a base 101, from the described The guide roller 102 moves toward the take-up roller 103 . In this embodiment, the substrate is PE film.

[0054] In this embodiment, the coagulation solution coating device 104 is an existing dip coating device, including a container filled with ethyl acetate; the guide roller position 102 is in the coagulation bath, and the collection roller 103 is located in the coagulation bath above the liquid level.

[0055] In this embodiment, the air-assisted spinning device 105 uses coaxial needles to perform air-assisted spinning on the ultra-high drawing solution. The models of the inner and outer needles are 18G and 15G respectively, and the fiber-forming line speed of the air-assisted spinning is 1000 m / min, the spinning solutio...

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Abstract

The invention discloses a continuous preparation method of a non-woven fabric. The continuous preparation method comprises the following steps that airflow-assisted spinning is carried out by using agraphene oxide / sodium polyacrylate mixed solution as a precursor, graphene oxide / sodium polyacrylate gel fibers are collected by using a reelable substrate, and drying is carried out to obtain a graphene oxide / sodium polyacrylate non-woven fabric separated from the substrate; and the substrate is soaked with solidification liquid, and the solidification liquid is selected from a poor graphene oxide solvent. According to the continuous preparation method of the non-woven fabric, a small amount of sodium polyacrylate solution is added into a graphene oxide aqueous solution, so that the grapheneoxide aqueous solution has an ultrahigh tensile property, and the non-woven fabric can be prepared by using an airflow-assisted spinning method, the process is simple, environment-friendly and efficient, and the continuous preparation method of a non-woven fabric is a new method for improving the processability of the graphene oxide solution so as to quickly prepare the graphene non-woven fabric.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a method and a system for obtaining non-woven fabrics in one step. [0002] technical background [0003] In 2004, the research group of Professor A.K. Geim of the University of Manchester successfully prepared graphene by mechanical exfoliation and suspended it on a micro-gold frame, overturning the theory that a perfect two-dimensional crystal structure cannot exist stably at non-absolute zero. In other words, graphene in a free state can exist stably at room temperature; under the same conditions, any other known material will be oxidized or decomposed, and even become unstable when it is equivalent to 10 times the thickness of its single layer. Structurally speaking, Graphene is a sp2 hybrid single-layer carbon atom crystal tightly packed into a two-dimensional honeycomb lattice structure. The carbon atoms in the layer are connected by covalent bonds and have ult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H13/00D04H1/4291D04H1/732D04H3/007D04H3/02D01F6/52D01F1/10D06C7/04
CPCD01F1/10D01F6/52D04H1/4291D04H1/732D04H3/007D04H3/02D04H13/00D06C7/04D10B2505/00D10B2505/04
Inventor 许震高超刘森坪
Owner HANGZHOU GAOXI TECH CO LTD