4.8 Article

A Breathable Knitted Fabric-Based Smart System with Enhanced Superhydrophobicity for Drowning Alarming

Journal

ACS NANO
Volume 16, Issue 11, Pages 18018-18026

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsnano.2c08325

Keywords

superhydrophobic; PDMS nanoparticles; conductive fabric; strain sensor; drowning alarming

Funding

  1. National Natural Science Foundation of China [22075046, 51972063, 21501127, 51502185]
  2. Natural Science Funds for Distinguished Young Scholars of Fujian Province [2020J06038]
  3. Natural Science Foundation of Fujian Province [2022J01568, 2019J01256]
  4. 111 Project [D17005]
  5. Opening Fund of the China National Textile and Apparel Council Key Laboratory of Flexible Devices for Intelligent Textile and Apparel, Soochow University [SDHY2110]
  6. State Key Laboratory of New Textile Materials and Advanced Processing Technologies [FZ2021012]
  7. Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2018M3D1A1058536]

Ask authors/readers for more resources

In this study, a wearable strain sensor based on superhydrophobic and conductive knitted polyester fabric was developed for stable and long-term monitoring of underwater human motion. The sensor exhibited good combination of superhydrophobicity and conductivity, as well as wearable and stretchable properties of the fabric.
Wearable strain sensors have aroused increasing interest in human motion monitoring, even for the detection of small physiological signals such as joint movement and pulse. Stable monitoring of underwater human motion for a long time is still a notable challenge, as electronic devices can lose their effectiveness in a wet environment. In this study, a superhydrophobic and conductive knitted polyester fabric-based strain sensor was fabricated via dip coating of graphene oxide and polydimethylsiloxane micro/nanoparticles. The water contact angle of the obtained sample was 156 degrees, which was retained above 150 degrees under deformation (stretched to twice the original length or bent to 80 degrees). Additionally, the sample exhibited satisfactory mechanical stability in terms of superhydrophobicity and conductivity after 300 abrasion cycles and 20 accelerated washing cycles. In terms of sensing performance, the strain sensor showed a rapid and obvious response to different deformations such as water vibration, underwater finger bending, and droplet shock. With the good combination of superhydrophobicity and conductivity, as well as the wearability and stretchability of the knitted polyester fabric, this wireless strain sensor connected with Bluetooth can allow for the remote monitoring of water sports, e.g., swimming, and can raise an alert under drowning conditions.

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