A Multifunctional, Self-Healing, Self-Adhesive, and Conductive Sodium Alginate/Poly(vinyl alcohol) Composite Hydrogel as a Flexible Strain Sensor
Top Cited Papers
- 23 February 2021
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 13 (9), 11344-11355
- https://doi.org/10.1021/acsami.1c01343
Abstract
Hydrogel-based wearable devices have attracted tremendous interest due to their potential applications in electronic skins, soft robotics, and sensors. However, it is still a challenge for hydrogel-based wearable devices to be integrated with high conductivity, a self-healing ability, remoldability, self-adhesiveness, good mechanical strength and high stretchability, good biocompatibility, and stimulus-responsiveness. Herein, multifunctional conductive composite hydrogels were fabricated by a simple one-pot method based on poly(vinyl alcohol) (PVA), sodium alginate (SA), and tannic acid (TA) using borax as a cross-linker. The composite hydrogel network was built by borate ester bonds and hydrogen bonds. The obtained hydrogel exhibited pH- and sugar-responsiveness, high stretchability (780% strain), and fast self-healing performance with healing efficiency (HE) as high as 93.56% without any external stimulus. Additionally, the hydrogel displayed considerable conductive behavior and stable changes of resistance with high sensitivity (gauge factor (GF) = 15.98 at a strain of 780%). The hydrogel was further applied as a strain sensor for monitoring large and tiny human motions with durable stability. Significantly, the healed hydrogel also showed good sensing behavior. This work broadens the avenue for the design and preparation of biocompatible polymer-based hydrogels to promote the application of hydrogel sensors with comfortable wearing feel and high sensitivity.Keywords
Funding Information
- National Natural Science Foundation of China (21978180)
This publication has 61 references indexed in Scilit:
- Self-healing hybrid nanocomposites consisting of bisphosphonated hyaluronan and calcium phosphate nanoparticlesBiomaterials, 2014
- Interactions Affecting the Mechanical Properties of Macromolecular Microsphere Composite HydrogelsThe Journal of Physical Chemistry B, 2013
- Mechanically Robust, Negative‐Swelling, Mussel‐Inspired Tissue AdhesivesAdvanced Healthcare Materials, 2012
- Improving performance of polyvinyl acetate (PVA) as a binder for wood by combination with melamine based adhesivesInternational Journal of Adhesion and Adhesives, 2011
- Redox-responsive self-healing materials formed from host–guest polymersNature Communications, 2011
- Cooperative Effect of Stress and Ion Displacement on the Dynamics of Cross-Link Unzipping and Rupture of Alginate GelsBiomacromolecules, 2010
- X-ray Diffraction Analysis of Poly(vinyl alcohol) Hydrogels, Obtained by Freezing and Thawing TechniquesMacromolecules, 2004
- States of water in poly(vinyl alcohol) derivative hydrogelsJournal of Polymer Science Part B: Polymer Physics, 2003
- Complexation chemistry of sodium borate with poly(vinyl alcohol) and small diols: a boron-11 NMR studyMacromolecules, 1987
- The Chemorheology of Poly(vinyl alcohol)-Borate GelsMacromolecules, 1969