Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 23, Pages 26496-26508Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c07717
Keywords
strain sensor; conductive hydrogel; poly(vinyl alcohol); phytic acid; amino-polyhedral oligomeric silsesquioxane
Funding
- Special Foundation for Science and Technology Major Plan of Xianyang [2018k01-46]
- Xi'an science and technology plan project [GXYD1.2]
- Science and Technology Plan Project of Weiyang District in Xi'an [201859]
- Shaanxi provincial education department [19JC003]
Ask authors/readers for more resources
Conductive hydrogel-based wearable strain sensors with tough, stretchable, self-recoverable, and highly sensitive properties are highly demanded for applications in electronic skin and human-machine interface. However, currently, hydrogel-based strain sensors put forward higher requirements on their biocompatibility, mechanical strength, and sensitivity. Herein, we report a poly(vinyl alcohol)/phytic acid/amino-polyhedral oligomeric silsesquioxane (PVA/PA/NH2-POSS) conductive composite hydrogel prepared via a facile freeze-thaw cycle method. Within this hydrogel, PA acts as a cross-linking agent and ionizes hydrogen ions to endow the material with ionic conductivity, while NH2-POSS acts as a second cross-linking agent by increasing the cross-linking density of the three-dimensional network structure. The effect of the content of NH2-POSS is investigated, and the composite hydrogel with 2 wt % NH2-POSS displays a uniform and dense three-dimensional (3D) network microporous structure, high conductivity of 2.41 S/m, and tensile strength and elongation at break of 361 kPa and 363%, respectively. This hydrogel is biocompatible and has demonstrated the application as a strain sensor monitoring different human movements. The assembled sensor is stretchable, self-recoverable, and highly sensitive with fast response time (220 ms) and excellent sensitivity (GF = 3.44).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available