19 research outputs found
Ionic Correlations in Random Ionomers
Understanding the
electrostatic interactions in ion-containing
polymers is crucial to better design shape memory polymers and ion-conducting
membranes for multiple energy storage and conversion applications.
In molten polymers, the dielectric permittivity is low, generating
strong ionic correlations that lead to clustering of the charges.
Here, we investigate the influence of electrostatic interactions on
the nanostructure of randomly charged polymers (ionomers) using coarse-grained
molecular dynamics simulations. Densely packed branched structures
rich in charged species are found as the strength of the electrostatic
interactions increases. Polydispersity in charge fraction and composition
combined with ion correlations leads to percolated nanostructures
with long-range fluctuations. We identify the percolation point at
which the ionic branched nanostructures percolate and offer a rigorous
investigation of the statistics of the shape of the aggregates. The
extra degree of freedom introduced by the charge polydispersity leads
to bicontinuous structures with a broad range of compositions, similar
to neutral A–B random copolymers, as well as to desirable percolated
ionic structure in randomly charged-neutral diblock copolymers. These
findings provide insight into the design of conducting and robust
nanostructures in ion-containing polymers
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments
Dynamic Defrosting on Nanostructured Superhydrophobic Surfaces
Water
suspended on chilled superhydrophobic surfaces exhibits delayed
freezing; however, the interdrop growth of frost through subcooled
condensate forming on the surface seems unavoidable in humid environments.
It is therefore of great practical importance to determine whether
facile defrosting is possible on superhydrophobic surfaces. Here,
we report that nanostructured superhydrophobic surfaces promote the
growth of frost in a suspended Cassie state, enabling its dynamic
removal upon partial melting at low tilt angles (<15°). The
dynamic removal of the melting frost occurred in two stages: spontaneous
dewetting followed by gravitational mobilization. This dynamic defrosting
phenomenon is driven
by the low contact angle hysteresis of the defrosted meltwater relative
to frost on microstructured superhydrophobic surfaces, which forms
in the impaled Wenzel state. Dynamic defrosting on nanostructured
superhydrophobic surfaces minimizes the time, heat, and gravitational
energy required to remove frost from the surface, and is of interest
for a variety of systems in cold and humid environments