%0 Online Multimedia
%A Nguyen, Ngoc A.
%A Meek, Kelly M.
%A Bowland, Christopher C.
%A Barnes, Sietske H.
%A Naskar, Amit K.
%D 2017
%T An Acrylonitrile–Butadiene–Lignin Renewable
Skin with Programmable and Switchable Electrical Conductivity for
Stress/Strain-Sensing Applications
%U https://acs.figshare.com/articles/media/An_Acrylonitrile_Butadiene_Lignin_Renewable_Skin_with_Programmable_and_Switchable_Electrical_Conductivity_for_Stress_Strain-Sensing_Applications/5739774
%R 10.1021/acs.macromol.7b02336.s003
%2 https://acs.figshare.com/ndownloader/files/10104114
%K syringylpropane-rich hardwood lignin
%K conductivity
%K strain fixity
%K T g
%K glass transition temperature
%K Switchable Electrical Conductivity
%K shape-memory materials
%K temperature-stimulated recovery
%K film
%K cross-linked lignin macromolecules
%K work density
%K shape recovery
%K 60 nm
%X We report an approach for programming
electrical conductivity of a bio-based leathery skin devised with
a layer of 60 nm metallic nanoparticles. Lignin-based renewable shape-memory
materials were made, for the first time, to program and restore the
materials’ electrical conductivity after repeated deformation
up to 100% strain amplitude, at a temperature 60–115 °C
above the glass transition temperature (Tg) of the rubbery matrix. We cross-linked lignin macromolecules with
an acrylonitrile–butadiene rubbery melt in high quantities
ranging from 40 to 60 wt % and processed the resulting thermoplastics
into thin films. Chemical and physical networks within the polymeric
materials significantly enhanced key characteristics such as mechanical
stiffness, strain fixity, and temperature-stimulated recovery of shape.
The branched structures of the guaiacylpropane-dominant softwood lignin
significantly improve the rubber’s Tg and produced a film with stored and recoverable elastic work density
that was an order of magnitude greater than those of the neat rubber
and of samples made with syringylpropane-rich hardwood lignin. The
devices could exhibit switching of conductivity before and after shape
recovery.
%I ACS Publications