Projects per year
Abstract
Hydrogel-based strain sensors have attracted considerable interest for applications such as skin-like electronics for human motion detection, soft robotics, and human–machine interfaces. However, fabrication of hydrogel strain sensors with desirable mechanical and piezoresistive properties is still challenging. Herein, a biocompatible hydrogel sensor is presented, which is made of polyvinyl alcohol (PVA) nanocomposite with high stretchability up to 500% strain, high mechanical strength of 900 kPa, and electrical conductivity (1.85 S m-1) comparable to human skin. The hydrogel sensors demonstrate excellent linearity in the whole detection range and great durability under cyclic loading with low hysteresis of 7%. These excellent properties are believed to be contributed by a new bilayer structural design, i.e., a thin, conductive hybrid layer of PVA/silver nanowires (AgNWs) deposited on a pure strong PVA substrate. PVA solution of high concentration is used to fabricate the substrate while the top layer consists of dilute PVA solution so that high content of AgNWs can be dispersed to achieve high electrical conductivity. Together with a rapid response time (0.32 s) and biocompatibility, this new sensor offers great potential as a wearable sensor for epidermal sensing applications, e.g., detecting human joint and muscle movements.
Original language | English |
---|---|
Article number | 2000426 |
Pages (from-to) | 1-12 |
Number of pages | 12 |
Journal | Advanced Materials Technologies |
Volume | 5 |
Issue number | 11 |
Early online date | 6 Sep 2020 |
DOIs | |
Publication status | Published - Nov 2020 |
Keywords
- biocompatibility
- human motion detection
- hydrogel strain sensors
- polyvinyl alcohol
Fingerprint Dive into the research topics of 'Biocompatible and highly stretchable PVA/AgNWs hydrogel strain sensors for human motion detection'. Together they form a unique fingerprint.
Projects
- 1 Finished
-
ARC_DECRA: Stretchable Strain Sensors Based on 3D-structured Nano-Carbon
1/05/17 → 30/10/20
Project: Other