Biomimetic Reversible Heat-Stiffening Polymer Nanocomposites
Version 2 2017-08-23, 04:14
Version 1 2017-07-26, 12:08
Posted on 2017-08-23 - 04:14
Inspired by the ability of the sea
cucumber to (reversibly) increase
the stiffness of its dermis upon exposure to a stimulus, we herein
report a stimuli-responsive nanocomposite that can reversibly increase
its stiffness upon exposure to warm water. Nanocomposites composed
of cellulose nanocrystals (CNCs) that are grafted with a lower critical
solution temperature (LCST) polymer embedded within a poly(vinyl acetate)
(PVAc) matrix show a dramatic increase in modulus, for example, from
1 to 350 MPa upon exposure to warm water, the hypothesis being that
grafting the polymers from the CNCs disrupts the interactions between
the nanofibers and minimizes the mechanical reinforcement of the film.
However, exposure to water above the LCST leads to the collapse of
the polymer chains and subsequent stiffening of the nanocomposite
as a result of the enhanced CNC interactions. Backing up this hypothesis
are energy conserving dissipative particle dynamics (EDPD) simulations
which show that the attractive interactions between CNCs are switched
on upon the temperature-induced collapse of the grafted polymer chains,
resulting in the formation of a percolating reinforcing network.
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
Cudjoe, Elvis; Khani, Shaghayegh; Way, Amanda E.; J. A. Hore, Michael; Maia, Joao; Rowan, Stuart J. (2017). Biomimetic Reversible Heat-Stiffening Polymer Nanocomposites. ACS Publications. Collection. https://doi.org/10.1021/acscentsci.7b00215
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 (6)
EC
Elvis Cudjoe
SK
Shaghayegh Khani
AW
Amanda E. Way
MJ
Michael J. A. Hore
JM
Joao Maia
SR
Stuart J. Rowan