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Multifunctional stretchable breathable sensing material based on oriented nanofibers

A technology of nanofibers and sensing materials, applied in the direction of fiber processing, fiber types, and thermometers using electric/magnetic elements that are directly sensitive to heat, can solve the problem of non-monotonic changes in temperature response signals, poor stability and repeatability, Monotonous change and other problems, to achieve the effect of improving sensitivity and repeatability, improving comfort, and good air permeability

Active Publication Date: 2021-08-06
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor stability and repeatability of the strain / temperature response behavior and non-monotonic change of the temperature response signal in the existing inorganic conductive nanoparticle-filled polymer-based flexible sensing materials. Polymer-based multifunctional stretchable breathable sensing materials with conductive mechanism, and use electrospinning technology to regulate the morphology of nanofiber membranes, and finally obtain good air permeability, stability and repeatability of strain / temperature response behavior , Polymer-based stretchable strain / temperature sensing materials with monotonous change in temperature response signal

Method used

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  • Multifunctional stretchable breathable sensing material based on oriented nanofibers
  • Multifunctional stretchable breathable sensing material based on oriented nanofibers
  • Multifunctional stretchable breathable sensing material based on oriented nanofibers

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Experimental program
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Effect test

Embodiment 1

[0042] 5g of PVDF was added into the solvent DMF, and after stirring, a uniform PVDF solution with a PVDF mass fraction of 20% was obtained. Then the PVDF solution is placed in a 10ml syringe (needle model is 18G), with an injection speed of 0.05mm / min, electrospinning under 20KV high voltage conditions (the distance between the syringe needle and the drum receiver is 20cm, and the drum speed is 2500rpm, The humidity is 30%, the temperature is 25°C), and a fiber film with nanofiber orientation distribution is obtained. Then place the fiber membrane in 10 g of 1-butyl-3-methylimidazole bistrifluoromethanesulfonimide salt solution at 25°C at 120W, 40KHz for 30 min, and then dry it in a vacuum oven at 50°C for 18h to obtain Composite nanofiber membrane, the morphology and structure of the fiber membrane is shown in Figure 1. On this fibrous membrane, electrodes are adhered along the two ends of the spline perpendicular to the orientation direction of nanofibers (the electrode ma...

Embodiment 2

[0044] 5g of TPU was added into the mixed solvent DMF / THF of tetrahydrofuran (THF) and N,N-dimethylformamide (DMF), and after stirring, a uniform TPU solution with a TPU mass fraction of 25% was obtained. Then 2.2g of 1-hexyl-3-methylimidazole bis-trifluoromethanesulfonimide salt was added to the TPU solution, and the mixed solution was obtained after mechanical stirring. The above mixed solution was placed in a 10ml syringe (the needle type was 20G), with an injection speed of 0.02mm / min, electrospinning under 25KV high voltage conditions (the distance between the syringe needle and the drum receiver was 15cm, and the drum speed was 2800rpm, The humidity is 25%, the temperature is 23° C.), and a fiber film with nanofiber orientation distribution is obtained. On this fibrous membrane, electrodes are adhered along the two ends of the spline perpendicular to the orientation direction of nanofibers (the electrode material is a conductive copper sheet, and the adhesive is a conduc...

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Abstract

The invention discloses a multifunctional stretchable breathable sensing material based on oriented nanofibers. The morphological structure of a nanofiber membrane is regulated and controlled through an electrostatic spinning technology, a conductive ionic liquid / flexible polymer nanofiber membrane with an orientation structure is designed, and a polymer-based stretchable strain / temperature sensing material with excellent sensing performance is obtained by preparing an electrode in the direction perpendicular to the nanofiber orientation direction. The nanofiber membrane with a porous structure is prepared by utilizing the electrostatic spinning technology, the air permeability is good, and the wearing comfort of a sensing device is improved; and in addition, the nanofiber membrane with nanofiber orientation distribution is prepared by skillfully adjusting a spinning process (mainly improving the rotating speed of a roller receiver), and the sensitivity and repeatability of strain / temperature sensing of the sensing device are improved.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and relates to a multifunctional stretchable breathable sensing material based on a nanofiber film with an orientation structure. Background technique [0002] With the rapid development of emerging fields such as electronic skin, human-computer interaction, and wearable electronic devices, flexible, stretchable, and wearable strain / temperature sensing materials as core components have become a focus of attention. Traditional strain / temperature sensing materials are mostly made of rigid materials such as metals or semiconductors, and their poor flexibility, stretchability and ductility limit the application of materials. Studies have shown that combining conductive materials with flexible polymers is an effective way to prepare flexible sensing materials. At present, the polymer-based flexible strain / temperature sensing materials that have been studied are mainly composed of inorganic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/352D06M13/438D01F6/12D01F6/70D04H1/728D01D5/00G01B7/16G01K7/16D06M101/22D06M101/38
CPCD06M13/352D06M13/438D01F6/12D01F6/70D04H1/728D01D5/0076G01B7/18G01K7/16D06M2101/22D06M2101/38
Inventor 陈建闻朱雨田王菲
Owner HANGZHOU NORMAL UNIVERSITY