Anti-Freezing and Anti-Drying Organohydrogel Coated with Graphene for Highly Sensitive and Ultrastretchable Strain Sensing

Xing Yang, Zixuan Wu, Yaoming Wei, Haojun Ding, Zhenyi Li, Kai Tao, Jin Wu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

This work presents a new strategy to develop an ultra-stretchable and sensitive strain sensor based on dual network (DN) hydrogel with enhanced anti-freezing, anti-drying and strain sensing ability. The two polymer networks of this hydrogel consist of polyacrylamide (PAM) and carrageenan which can disperse the externally applied stress and maintain a certain morphology integrity when the hydrogel is deformed. Thanks to the reduced graphene oxide (rGO) coated on the surface of the DN hydrogel, the obtained hydrogel sample showed ultrahigh gauge factor (GF) as a strain sensor due to the tunneling effect which make the resistance of the sensor change much more than the pristine one when it detects strain. The GF of the obtained composite hydrogel-based strain sensor reached to 90.5 which is about 20 × higher than the sample without coating rGO in a large detection range from 1% to 400% strain. Furthermore, to endow this hydrogel with anti-freezing and non-drying ability, we soaked it into 1, 2-Propanediol (PG) to replace some water molecules in it for a given time, which made it not freeze at -60°C and could keep water 3.6 × more than before in a dry environment, showing a broad application prospect in the field of strain sensing in harsh environments.

Original languageEnglish
Title of host publication21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1231-1234
Number of pages4
ISBN (Electronic)9781665412674
DOIs
StatePublished - 20 Jun 2021
Event21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021 - Virtual, Online, United States
Duration: 20 Jun 202125 Jun 2021

Publication series

Name21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021

Conference

Conference21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021
Country/TerritoryUnited States
CityVirtual, Online
Period20/06/2125/06/21

Keywords

  • Anti-freezing and anti-drying
  • Human motion monitoring
  • Reduced graphene oxide
  • Strain sensor

Fingerprint

Dive into the research topics of 'Anti-Freezing and Anti-Drying Organohydrogel Coated with Graphene for Highly Sensitive and Ultrastretchable Strain Sensing'. Together they form a unique fingerprint.

Cite this