Stretchable capacitive fabric electronic skin woven by electrospun nanofiber coated yarns for detecting tactile and multimodal mechanical stimuli

The development of highly sensitive, stretchable, and wearable textile-based electronic skin is of great value for application in human health monitoring, robot skin, and intelligent electronic devices. Here, we construct a highly sensitive and stretchable electronic fabric with a simple and low-cos...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2018, Vol.6 (47), p.12981-12991
Main Authors: You, Xiaolu, He, Jianxin, Nan, Nan, Sun, Xianqiang, Qi, Kun, Zhou, Yuman, Shao, Weili, Liu, Fan, Cui, Shizhong
Format: Article
Language:English
Subjects:
Air flow
Coated electrodes
Cotton
Dielectrics
Electronic devices
Fingers
Graphene
Humanoid
Muscles
Nanofibers
Polyurethane resins
Response time
Robots
Sensitivity
Sensors
Strain
Textile industry
Voice recognition
Wearable technology
Wrist
Yarn
Yarns
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Summary:The development of highly sensitive, stretchable, and wearable textile-based electronic skin is of great value for application in human health monitoring, robot skin, and intelligent electronic devices. Here, we construct a highly sensitive and stretchable electronic fabric with a simple and low-cost electrospinning technology that enables us to simultaneously map and quantify the mechanical stresses induced by normal pressure, lateral strain, and flexion and to detect the noncontact finger proximity. The fabric is woven from composite yarns that are formed by a core-spun yarn wound helically around the surface of the elastic thread, wherein the core-spun yarn is obtained by coating a graphene (GO)-doped polyurethane (PU) nanofiber on the surface of a Ni-coated cotton yarn. The Ni-coated cotton yarn serves as conductive electrodes, and the nanofiber coating provides a dielectric layer. The three-dimensional elastic porous nanofiber structure of the dielectric layer, the fiber aggregate structure of the conductive electrode, and the helical structure of the elastic composite yarn play key roles in allowing the sensor unit of the electronic fabric to improve sensitivity, realize multiple-force sensitivities and realize stretchable and woven wearability. The sensor unit that can induce a large contact-area accumulation of the nanofiber dielectric layers under low external force exhibits excellent sensitivity (1.59 N −1 ,
ISSN:2050-7526
2050-7534
DOI:10.1039/c8tc03631d