Knitted flexible sensing fabric based on Mxene coated conductive yarn and preparation method

A conductive yarn and fabric technology, applied in knitting, weft knitting, yarn and other directions, to achieve the effects of high sensitivity, high strain, and high wearing comfort

Active Publication Date: 2021-01-22
XI'AN POLYTECHNIC UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented innovation involves modifying certain types of metal fibers called tungsten (W) or molybdenum disulfide (MoS2) into electrically conductive materials that can then form thin layers onto surfaces during manufacturing processes for fabrics made from them. By adding these modifications, this new type of metallic-fiber composite yarns have improved mechanical strength compared to traditional wires while still maintaining their ability to transmit signals effectively without losing signal quality due to external influences such as bending stress. These improvements make it possible to create highly stretch resistant and sensitive electronic devices suitable for use in various applications including medicine diagnoses, athletic trainings, fitness monitoring, smart connections, etc., which are important technologies today.

Problems solved by technology

Technological Problem: Current designs of flexible smart wristbands use various techniques like filling rubble conductor materials into cloths made up mostly of polyethylene terephthalate (PET). These current solutions result in decreased sensitiveness due to increased stress levels caused by flexibility and lack of stable electrical connections over time. Additionally, these existing designs require multiple layers of conductives to achieve desired results but they also increase complexity making them hard to manufacturing at reasonable cost.

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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  • Knitted flexible sensing fabric based on Mxene coated conductive yarn and preparation method

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Experimental program
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preparation example Construction

[0024] A kind of preparation method of the knitted flexible sensing fabric based on Mxene coating conductive yarn of the present invention, comprises the following steps:

[0025] 1) Carry out grafting modification to the stainless steel blended yarn pretreated by plasma in tris-hydroxymethylaminomethane (Tris-HCl) buffer solution of dopamine, the concentration of the reaction solution is 0.5-5g / L, the modification time for 12-48 hours. The tris buffered solution of dopamine has a concentration of 5-10 mmol / L and a pH value of 8-10. Stainless steel blended yarn includes blended yarn and stainless steel fiber, wherein the mass ratio of stainless steel fiber to stainless steel blended yarn is 10-40%, and the blended yarn includes cotton fiber, cellulose fiber, polyester fiber, polyamide fiber or acrylic fiber One or a combination of acrylic fibers. This step can increase the reactivity of the surface of the blended yarn.

[0026] 2) The above-mentioned dopamine-modified stain...

Embodiment 1

[0032] The plasma-pretreated stainless steel blended yarn with a cotton fiber / stainless steel fiber weight ratio of 70:30 was grafted in a dopamine-tris-HCl buffer solution with a concentration of 2 g / L. property, wherein the concentration of tris in the Tris-HCl buffer solution is 8mmol / L, the pH value of the buffer solution is 9, and the modification time of the blended yarn in the dopamine reaction solution is 24 hours; The modified stainless steel blended yarn was subjected to 10 dipping-drying cycles in the Mxene aqueous solution with a concentration of 0.5 mg / mL to realize the coating of MXene inside and on the surface of the blended yarn, and to form a conductive MXene on the stainless steel blended yarn substrate. Structure; the above-mentioned MXene with secondary conductive structure is coated with stainless steel blended yarn, and 1H, 1H, 2H, 2H-perfluorooctyltrimethoxysilane is deposited on its surface by physical vapor deposition process to form a hydrophobic coati...

Embodiment 2

[0034]Plasma-pretreated stainless steel blended yarns with a weight ratio of cotton fibers / polyester fibers / stainless steel fibers of 30:30:40 were treated with tris-hydroxymethylaminomethane (Tris-HCl) at a concentration of 0.5 g / L dopamine. Carry out grafting modification in buffer solution, wherein the concentration of tris in Tris-HCl buffer solution is 5mmol / L, the pH value of buffer solution is 8, the modification time of blended yarn in dopamine reaction solution is 14 hours; the above-mentioned dopamine-modified stainless steel blended yarn was subjected to 5 dipping-drying cycles in the Mxene aqueous solution with a concentration of 6 mg / mL to realize the coating of MXene inside and on the surface of the blended yarn. The MXene conductive structure is formed on the yarn substrate; the above-mentioned MXene with secondary conductive structure is coated with stainless steel blended yarn, and 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane is deposited on the surface by phys...

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 discloses knitted flexible sensing fabric based on Mxene coated conductive yarn and a preparation method. Stainless steel blended conductive yarn is modified by dopamine, and then Mxenecoated conductive layers are further formed in the yarn and on the surface of the yarn by the way of impregnating. The conductive characteristic of the composite yarn is utilized, and the elasticity of a knitting process is further combined, so that the flexible sensing fabric with a designable structure is developed. According to the knitted flexible sensing fabric and the preparation method thereof, the contradiction among high strain, high sensitivity and wearing comfort of the flexible sensing fabric is solved, and the designed fabric can meet the application requirements of the flexible sensing fabric in the fields of medical diagnosis, physical training, health recovery, intelligent interconnection and the like. Meanwhile, the method is simple in process, easy to operate, controllable in process and suitable for large-scale preparation of the knitted flexible sensing fabric.

Description

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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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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Owner XI'AN POLYTECHNIC UNIVERSITY
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