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Nanofibrillar Poly(vinyl alcohol) Ionic Organohydrogels for Smart Contact Lens and Human-Interactive Sensing
- Source :
- ACS Applied Materials & Interfaces. 12:23514-23522
- Publication Year :
- 2020
- Publisher :
- American Chemical Society (ACS), 2020.
-
Abstract
- Hydrogel bioelectronics as one of the next-generation wearable and implantable electronics ensures excellent biocompatibility and softness to link the human body and electronics. However, volatile, opaque, and fragile features of hydrogels due to the sparse and microscale three-dimensional network seriously limit their practical applications. Here, we report a type of smart and robust nanofibrillar poly(vinyl alcohol) (PVA) organohydrogels fabricated via one-step physical cross-linking. The nanofibrillar network cross-linked by numerous PVA nanocrystallites enables the formation of organohydrogels with high transparency (90%), drying resistance, high toughness (3.2 MJ/m3), and tensile strength (1.4 MPa). For strain sensor application, the PVA ionic organohydrogel after soaking in NaCl solution shows excellent linear sensitivity (GF = 1.56, R2 > 0.998) owing to the homogeneous nanofibrillar PVA network. We demonstrate the potential applications of the nanofibrillar PVA-based organohydrogel in smart contact lens and emotion recognition. Such a strategy paves an effective way to fabricate strong, tough, biocompatible, and ionically conductive organohydrogels, shedding light on multifunctional sensing applications in next-generation flexible bioelectronics.
- Subjects :
- Toughness
Vinyl alcohol
Materials science
Biocompatibility
Contact Lenses
Movement
Nanofibers
Nanotechnology
02 engineering and technology
01 natural sciences
Wearable Electronic Devices
chemistry.chemical_compound
Tensile Strength
0103 physical sciences
Ultimate tensile strength
Humans
General Materials Science
Microscale chemistry
Monitoring, Physiologic
Bioelectronics
010304 chemical physics
Electric Conductivity
Hydrogels
021001 nanoscience & nanotechnology
Contact lens
chemistry
Polyvinyl Alcohol
Self-healing hydrogels
Nanoparticles
0210 nano-technology
Facial Recognition
Subjects
Details
- ISSN :
- 19448252 and 19448244
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- ACS Applied Materials & Interfaces
- Accession number :
- edsair.doi.dedup.....d5f817501dbb5c00cc202f7762600dbd