Abstract:
This paper presents a facile and versatile salt-percolated method to synthesize anti-drying and antifreezing hydrogels for wide-range temperature detection and tiny strai...Show MoreMetadata
Abstract:
This paper presents a facile and versatile salt-percolated method to synthesize anti-drying and antifreezing hydrogels for wide-range temperature detection and tiny strain monitoring. Lithium bromide (LiBr) is verified as the most effective drying and freezing inhibitor for hydrogels among various salts. The hydrogels with 50wt% LiBr percolation retain high stretchability (400% and 625% strain) even upon exposure to ambient for one year or at −78.5 °C. The density functional theory (DFT) simulations reveal that the high binding energy between H2O and Li+/Br is responsible for the excellent drying and freezing tolerances of salt-percolated hydrogel. The salt percolation method endows hydrogel with improved sensing performance. The thermal sensitivity of the temperature sensor is promoted from 1.89%/°C to 2.54%/°C and the response time is reduced from 202.6 to 53.6 s. The high resolution of strain sensor (0.1% strain) enables the salt-percolated hydrogel to detect various kinds of physiological signals, which exhibits great promise for wearable applications.
Published in: 2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers)
Date of Conference: 20-24 June 2021
Date Added to IEEE Xplore: 06 August 2021
ISBN Information:
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Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Temperature Sensor ,
- Strain Sensors ,
- Stretchable Temperature ,
- High-resolution ,
- Binding Energy ,
- Density Functional Theory ,
- Percolation ,
- Sensitivity Of The Sensor ,
- Facile Method ,
- Thermal Sensitivity ,
- Freezing Tolerance ,
- Density Functional Theory Simulations ,
- Kinds Of Signals ,
- High Stretchability ,
- Water Molecules ,
- Melting Point ,
- Branched-chain ,
- Density Functional Theory Calculations ,
- One-pot ,
- Response Speed ,
- Double Network Hydrogels ,
- Fast Response Speed ,
- Stretchable Electronics ,
- Carrageenan ,
- Ice Crystals ,
- Human Motion ,
- Conductive Hydrogels ,
- Remarkable Tolerance ,
- Specific Heat Capacity
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Temperature Sensor ,
- Strain Sensors ,
- Stretchable Temperature ,
- High-resolution ,
- Binding Energy ,
- Density Functional Theory ,
- Percolation ,
- Sensitivity Of The Sensor ,
- Facile Method ,
- Thermal Sensitivity ,
- Freezing Tolerance ,
- Density Functional Theory Simulations ,
- Kinds Of Signals ,
- High Stretchability ,
- Water Molecules ,
- Melting Point ,
- Branched-chain ,
- Density Functional Theory Calculations ,
- One-pot ,
- Response Speed ,
- Double Network Hydrogels ,
- Fast Response Speed ,
- Stretchable Electronics ,
- Carrageenan ,
- Ice Crystals ,
- Human Motion ,
- Conductive Hydrogels ,
- Remarkable Tolerance ,
- Specific Heat Capacity
- Author Keywords