Electrostatic Twisting of Core-Shell Nanofibers for Strain Sensing Applications

Peer reviewed: 
Yes, item is peer reviewed.
Scholarly level: 
Faculty/Staff
Final version published as: 

Kanygin, M. A., Shafiei, M., & Bahreyni, B. (2020). Electrostatic Twisting of Core-Shell Nanofibers for Strain Sensing Applications. ACS Applied Polymer Materials. https://doi.org/10.1021/acsapm.0c00580.

Date created: 
2020-09-18
Identifier: 
DOI: 10.1021/acsapm.0c00580
Keywords: 
Electrospinning
Core-shell nano-fibers
Carbon nanotubes
Strain sensor
Smart Textiles
Abstract: 

Stretchable strain sensors are increasingly needed in emerging fields of wearable electronics and smart textiles for applications ranging from human motion detection to health monitoring. Nanofibers made from conductive materials or composites of polymers and conductive nanoparticles exhibit strong sensitivities but are difficult to utilize due to their small dimensions. Herein, we report on a technique for producing core-shell nanofibers and in-situ twisting of them to each other using a rotating electric field. The process produces sensitive threads that can be handled easily and used, for instance, in smart textile applications. The core-shell nanofibers utilized poly(vinylidene fluoride) as the structural polymer and multiwalled carbon nanotubes were used to make the core electrically conductive. The structure of nanofibers was studied through a set of analytical methods. The fibers exhibit strong piezoresistive responses and can be utilized in various strain sensing applications. Mechanical properties of fabricated submicron fiber yarns are compared with non-twisted fibers and improvement of their stretchability has been demonstrated. Furthermore, the sensitivity of fiber threads to different directions of stretching depended on the way of their knitting into fabric has been compared.

Description: 

The full text of this paper will be available in September, 2021 due to the embargo policies of ACS Applied Polymer Materials. Contact summit@sfu.ca to enquire if the full text of the accepted manuscript can be made available to you.

Language: 
English
Document type: 
Article
Rights: 
Rights remain with the authors.
Sponsor(s): 
Innovation for Defence Excellence and Security (IDEaS)
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