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Preparation method of strain-sensing nanofiber yarn

A nanofiber and sensing technology, applied in fiber treatment, fiber chemical characteristics, spinning solution preparation, etc., to prevent agglomeration, respond sensitively, and improve dispersibility

Active Publication Date: 2015-10-07
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, sensitive and soft sensors are an important part of intelligent fabrics. Traditional sensors are difficult to meet their softness requirements. Therefore, the development of a soft, wearable, lightweight, and yarn-like sensor is related to the future of smart textiles and even the textile and garment industry.

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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  • Preparation method of strain-sensing nanofiber yarn
  • Preparation method of strain-sensing nanofiber yarn
  • Preparation method of strain-sensing nanofiber yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Purify and acidify SWNTs with a mixed acid solution composed of 65% nitric acid and 95% sulfuric acid (the volume ratio of nitric acid and sulfuric acid is 1:3), the purpose is to remove impurities in SWNTs and make the destroyed side wall carbon rings The terminal is oxidized to a carboxyl group. Centrifuge the mixed acid solution of SWNTs, and separate SWNTs from the acid solution, wash SWNTs repeatedly with deionized water until the pH of the cleaning solution is 7, and dry the pretreated SWNTs at 70 °C. The acidified SWNTs were added to the thionyl chloride solution, stirred at 60°C for 24 hours, and then the mixed solution was centrifuged, and the separated SWNTs were washed repeatedly with tetrahydrofuran to remove unreacted thionyl chloride, and air-dried. SWNTs bearing acid chloride groups were obtained. Add the SWNTs with acid chloride groups to the ethylenediamine solution, stir at 60°C for 72 hours, then centrifuge the mixed solution, rinse the separated prod...

Embodiment 2～6

[0046] The basic production process and raw materials are the same as in Example 1, except that the mass percentages of SWNTs in the prepared spinning solution are 0.2%, 0.4%, 0.6%, 0.8%, and 2%, respectively. After testing, the electrical properties of each composite nanofiber yarn are as follows: image 3 As shown, its micro-strain performance is as Figure 4 shown.

[0047] Depend on image 3 It can be seen that the electrical conductivity of the composite nanofiber yarn increases with the increase of SWNTs mass percentage, and the threshold of SWNTs mass percentage is 0.8 wt%.

[0048] Figure 4 It can be seen that the change of resistance changes linearly with the increase of strain, and the gauge factor is 1.12, and the lower the mass percentage of SWNTs, the greater the change in resistance.

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Abstract

The invention discloses a strain-sensing nano fiber yarn. The strain-sensing nano fiber yarn is characterized by comprising a plurality of nanoscale polymer fibers of which the diameters are 100-1000nm; single-walled carbon nanotubes (SWNTs) are arranged inside the fiber in an orientation manner; a conductive network is formed; the resistance of each nanoscale polymer fiber changes along with strain; the resistance change rate and the strain form a linear relation; the SWNTs are single-walled carbon nanotubes. The SWNTs are added to the fiber yarn disclosed by the invention, so that the electrical properties of the composite nano fiber yarns are improved; the conductivity of the composite nano fiber yarns is improved along with an increase of the weight percent of the SWNTs; the threshold is 0.7-1 wt%. Meanwhile, the invention provides a preparation method of the fiber yarn. The nano fiber is simply, economically and effectively prepared by an electrostatic spinning method in a bath foam; the nano fibers deposited on the surface of a cathode bath foam are wound on a collecting roller after being dried by heat. By adopting the method, the mechanical and electrical properties of the fiber yarn can be improved.

Description

technical field [0001] The invention belongs to the technical field of application of new textile materials, and in particular relates to a strain-sensing nanofiber yarn and a preparation method thereof. Background technique [0002] With the development of new textile technologies, textiles are developing towards functionalization and intelligence. As an important branch of the field of intelligent textiles, electronic information intelligent textiles have become a hot research topic in the field of high-tech fabrics. It integrates microelectronics, information, computer and other technologies into textiles, and usually includes three parts: sensors, drive units and control units. Among them, sensitive and soft sensors are an important part of intelligent fabrics. Traditional sensors are difficult to meet their softness requirements. Therefore, the development of a soft, wearable, lightweight, and yarn-like sensor is related to the future of smart textiles and even the text...

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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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94D01F6/50D01F6/54D01F1/09D06M11/56D06M11/65D06M13/268D06M13/332D01D5/00D01D1/02
Inventor 潘志娟李杰田龙刘洋
Owner SUZHOU UNIV
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