Highly Stretchable Conductive Covalent Coacervate
Gels for Electronic Skin
Posted on 2022-02-21 - 21:15
Highly
stretchable electrically conductive hydrogels have been
extensively researched in recent years, especially for applications
in strain and pressure sensing, electronic skin, and implantable bioelectronic
devices. Herein, we present a new cross-linked complex coacervate
approach to prepare conductive hydrogels that are both highly stretchable
and compressive. The gels involve a complex coacervate between carboxylated
nanogels and branched poly(ethylene imine), whereby the latter is
covalently cross-linked by poly(ethylene glycol) diglycidyl ether
(PEGDGE). Inclusion of graphene nanoplatelets (Gnp) provides electrical
conductivity as well as tensile and compressive strain-sensing capability
to the hydrogels. We demonstrate that judicious selection of the molecular
weight of the PEGDGE cross-linker enables the mechanical properties
of these hydrogels to be tuned. Indeed, the gels prepared with a PEGDGE
molecular weight of 6000 g/mol defy the general rule that toughness
decreases as strength increases. The conductive hydrogels achieve
a compressive strength of 25 MPa and a stretchability of up to 1500%.
These new gels are both adhesive and conformal. They provide a self-healable
electronic circuit, respond rapidly to human motion, and can act as
strain-dependent sensors while exhibiting low cytotoxicity. Our new
approach to conductive gel preparation is efficient, involves only
preformed components, and is scalable.
CITE THIS COLLECTION
DataCite
3 Biotech
3D Printing in Medicine
3D Research
3D-Printed Materials and Systems
4OR
AAPG Bulletin
AAPS Open
AAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)
Academic Medicine
Academic Pediatrics
Academic Psychiatry
Academic Questions
Academy of Management Discoveries
Academy of Management Journal
Academy of Management Learning and Education
Academy of Management Perspectives
Academy of Management Proceedings
Academy of Management Review
Nguyen, Nam T.; Jennings, James; Milani, Amir H.; Martino, Chiara D. S.; Nguyen, Linh T. B.; Wu, Shanglin; et al. (2022). Highly Stretchable Conductive Covalent Coacervate
Gels for Electronic Skin. ACS Publications. Collection. https://doi.org/10.1021/acs.biomac.1c01660
or
Select your citation style and then place your mouse over the citation text to select it.
SHARE
Usage metrics
Read the peer-reviewed publication
AUTHORS (11)
NN
Nam T. Nguyen
JJ
James Jennings
AM
Amir H. Milani
CM
Chiara D. S. Martino
LN
Linh T. B. Nguyen
SW
Shanglin Wu
MM
Muhamad Z. Mokhtar
JS
Jennifer M. Saunders
JG
Julien E. Gautrot
SA
Steven P. Armes
BS
Brian R. Saunders
KEYWORDS
provides electrical conductivityimplantable bioelectronic devicesexhibiting low cytotoxicityconductive gel preparationhealable electronic circuitprepare conductive hydrogelsconductive hydrogels achievepegdge molecular weightmolecular weightelectronic skinpegdge crosspegdge ).toughness decreasesstrength increasessensing capabilityrespond rapidlyrecent yearspressure sensingpreformed componentsnew gelsnew crossnew approachmol defymechanical propertieslinker enablesjudicious selectionhuman motionhighly stretchablegraphene nanoplateletsgeneral rulegels preparedgels involveextensively researcheddiglycidyl etherdependent sensorscovalently crosscomplex coacervatecarboxylated nanogels6000 g25 mpa1500 %.