ACS Nano,
Journal Year:
2022,
Volume and Issue:
16(4), P. 6700 - 6711
Published: March 25, 2022
High-strength,
flexible,
and
multifunctional
characteristics
are
highly
desirable
for
electromagnetic
interference
(EMI)
shielding
materials
in
the
field
of
electric
devices.
In
this
work,
inspired
by
natural
nacre,
we
fabricated
large-scale,
layered
MXene/amarid
nanofiber
(ANF)
nanocomposite
papers
blade-coating
process
plus
sol-gel
conversion
step.
The
as-synthesized
possess
excellent
mechanical
performance,
that
is,
exceptional
tensile
strength
(198.80
±
5.35
MPa),
large
strain
(15.30
1.01%),
good
flexibility
(folded
into
various
models
without
fracture),
which
ascribed
to
synergetic
interactions
interconnected
three-dimensional
network
frame
hydrogen
bonds
between
MXene
ANF.
More
importantly,
with
extensive
continuous
conductive
paths
formed
nanosheets
present
a
high
EMI
effectiveness
13188.2
dB
cm2
g-1
frequency
range
8.2-12.4
GHz.
interestingly,
show
Joule
heating
performance
fast
thermal
response
(<10
s)
low
driving
voltage
(≤4
V).
As
such,
large-scale
MXene/ANF
considered
as
promising
alternatives
wide
applications
management.
Journal of Applied Physics,
Journal Year:
2021,
Volume and Issue:
130(22)
Published: Dec. 10, 2021
There
exists
serious
miscomprehension
in
the
open
literature
about
electromagnetic
interference
shielding
effectiveness
(EMI
SE)
as
a
critical
index
to
evaluate
performance,
which
is
misleading
graduates
and
newcomers
embarking
on
field
of
materials.
EMI
SE
defined
sum
three
terms
including
reflection
loss,
absorption
loss
multiple
classical
Schelkunoff
theory,
while
it
decomposed
into
two
named
practice,
called
Calculation
theory
here.
In
this
paper,
we
elucidate
widely-seen
misconceptions
connected
with
via
theoretical
derivation
instance
analysis.
Firstly,
are
often
mistakenly
regarded
approximation
same
names
when
negligible.
Secondly,
insufficient
unreasonable
determine
absorption-dominant
performance
case
that
higher
than
since
cannot
represent
actual
levels
reflected
absorbed
power.
Power
coefficients
recommended
compare
contribution
performance.
Thirdly,
effect
included
definitions
reflections
property
clarified
against
commonly
wrong
understandings.
These
clarifications
offer
correct
comprehension
mechanism
assessment
total
shielding.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(26)
Published: March 29, 2022
Abstract
The
rapid
development
of
portable
flexible
electronic
devices
means
a
multifunctional
composite
film
with
excellent
thermal
management
capability,
high
electromagnetic
interference
(EMI)
shielding,
and
strong
fire
safety
performance
is
urgently
required.
In
this
paper,
inspired
by
“brick–mortar”
sandwich
structure,
phase
change
capsules
(PCCs)
MXene
nanosheets
are
prepared.
Subsequently,
one‐step
vacuum‐assisted
filtration
method
used
to
fabricate
PCC/MXene/polyvinyl
alcohol
(PMP)
light‐to‐thermal
conversion
efficiency,
Joule
heating
generation,
safety,
EMI
shielding
effects.
superior
preparation
technology
endows
the
multi‐source
driven
capabilities
effectiveness
values
(43.13
dB).
addition,
PMP
exhibits
good
flexibility
enthalpy
(136.8
J
g
−1
).
Surprisingly,
film's
properties
improve
its
reliability
safety.
summary,
simple
technique
outstanding
overall
films
provide
broad
application
prospects
in
advanced
wearable
products.
Journal of Materials Chemistry A,
Journal Year:
2020,
Volume and Issue:
8(40), P. 21131 - 21141
Published: Jan. 1, 2020
Flexible
conductive
MXene/cellulose
nanocrystal
coated
polyurethane
nonwoven
fabrics
were
designed
and
developed
for
wearable
strain/pressure
sensors
with
tunable
sensing
performance.
ACS Nano,
Journal Year:
2020,
Volume and Issue:
14(10), P. 14134 - 14145
Published: Oct. 12, 2020
Flexible
and
lightweight
high-performance
electromagnetic
interference
shielding
materials
with
minimal
thickness,
excellent
mechanical
properties,
outstanding
reliability
are
highly
desired
in
the
field
of
fifth-generation
(5G)
communication,
yet
remain
extremely
challenging
to
manufacture.
Herein,
we
prepared
an
ultrathin
densified
carbon
nanotube
(CNT)
film
superior
properties
ultrahigh
effectiveness.
Upon
complete
removal
impurities
pristine
CNT
film,
charge
separation
individual
CNTs
induced
by
polar
molecules
leads
strong
CNT-CNT
attraction
densification,
which
significantly
improve
electrical
conductivity,
performance,
strength.
The
tensile
strength
is
up
822
±
21
MPa,
meanwhile
conductivity
as
high
902,712
S/m,
density
only
1.39
g
cm-3.
Notably,
effectiveness
over
51
dB
a
thickness
merely
1.85
μm
broad
frequency
range
4-18
GHz,
it
reaches
∼82
at
6.36
∼101
14.7
μm,
respectively.
Further,
such
exhibits
after
extended
period
acid/alkali,
temperature,
humidity.
It
demonstrates
best
overall
performance
among
representative
far,
representing
critical
breakthrough
preparation
toward
applications
wearable
electronics
5G
communication.
Advanced Functional Materials,
Journal Year:
2021,
Volume and Issue:
31(27)
Published: April 23, 2021
Abstract
As
a
new
2D
material,
MXene
(Ti
3
C
2
T
x
)
shows
great
potential
as
smart
multifunctional
humidity‐responsive
actuator
due
to
its
high
hydrophilicity
and
conductivity
but
suffers
from
ambient
oxidation
mechanical
brittleness.
Inspired
by
the
mussels,
authors
overcome
these
weaknesses
designing
fabricating
nacre‐like
lamellar‐structured
composite
film
that
consists
of
polydopamine‐modified
bacterial
cellulose
nanofibers,
which
improved
properties
moisture‐driven
actuator.
The
has
(2848
S
cm
–1
),
excellent
tensile
strength
(406
MPa),
toughness
(15.3
MJ
m
–3
).
Moreover,
is
highly
sensitive
moisture
with
advantages
fast
response
(1.6
s),
large
deformation
(176°),
actuation
force
output
(6.5
N
–2
It
additionally
demonstrated
works
electrical
switch,
robotic
arm,
motor
in
manner.
Overall,
it
believed
this
work
improves
drawbacks
current
MXene‐based
actuators,
laying
groundwork
for
their
wider
applications
devices.
