Bio-Medical Materials and Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 11, 2024
Background
In
sports,
especially
high-intensity
and
high-risk
activities,
the
meniscus
is
easily
damaged.
For
patients
with
injuries,
it
necessary
to
repair
or
replace
patient's
meniscus.
However,
as
age
increases,
human
tissue
gradually
forms
cannot
be
repaired
through
its
own
Therefore,
maintain
movement
function
support
materials.
Objective
Traditional
materials
have
poor
mechanical
properties
biocompatibility.
response
this
issue,
study
designed
a
scaffold
made
of
silk
short
fibers,
fibroin,
wool
protein.
Methods
Through
electrospinning
freeze-drying
techniques,
material
was
processed
obtain
fiber
biomimetic
structure.
Results
experiments,
surface
morphology,
hydrophobicity,
porosity,
secondary
structure,
thermal
stability,
water
absorption
swelling,
MP
MCS
SSF
were
characterized.
Conclusion
The
experimental
results
show
that
manufactured
has
good
compressive
performance,
swelling
properties,
also
exhibits
A
flexible
Film
bulk
acoustic
resonator
(FBAR)
radio-frequency
(RF)
sensor
based
on
a
substrate
and
β-type
polyvinylidene
fluoride
(PVDF)
film
is
proposed
for
tactile
perception.
The
molecule
chains
of
the
PVDF
have
spontaneously
polarized
structure,
showing
high
piezoelectric
characteristic.
FBAR
structure
sandwiched
Al/β-type
PVDF/Al
polyimide
(PI)
substrate.
Experimental
results
show
that
resonance
frequency
RF
around
250
MHz,
it
shows
bending
pressure
sensitivities
with
sensitivity
–330
kHz/mm–1,
compressive
4.7
kHz/Pa,
lower
temperature
drift
coefficient
(TCF)
−63
ppm/K.
This
research
integrates
multiphysics
finite
element
analysis
modified
Butterworth–Van
Dyke
(MBVD)
model
to
elucidate
interaction
mechanisms
between
waves
(BAW)
molecules
within
layer.
It
theoretically
experimentally
explains
regulation
BAW
excitation
by
mechanical
thermal
fields
in
FBAR.
expected
potential
applications
wearable
devices,
robots,
soft
touch,
medical
diagnosis.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(16), P. 9663 - 9672
Published: Aug. 14, 2024
From
the
principle
of
molecular
design
and
microphase
separation,
B-THDI-MPEG
was
prepared
by
reaction
1,6-hexyl
diisocyanate
trimer
(THDI)
with
bis(2-hydroxyethyl)
terephthalate
(BHET)
methoxy
polyethylene
glycols
(MPEGs).
Polyurethane
a
hard
skeleton
hanging
PEG
soft
segment
(SPPU)
synthesized
using
as
polyol.
SPPU
is
capable
separation
in
aqueous
phase,
leading
to
chain
rearrangement,
thus
improving
crystallinity,
tensile
performance,
thermal
stability,
triggering
shape
memory
property.
The
strength
increases
after
soaking
water
(25
W)
compared
dry
environment
(25D).
Compared
SPPU4-25D
(18.1
MPa),
SPPU4-25W
21.1
MPa,
showing
water-induced
softening
phenomenon.
However,
polyurethane
segments
on
main
chains
(PPU)
decreases
being
soaked
water.
Moreover,
when
content
57.5
wt
%,
recovery
rate
SPPU4
reaches
88.6%
takes
short
time
under
heating
Bio-Medical Materials and Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 11, 2024
Background
In
sports,
especially
high-intensity
and
high-risk
activities,
the
meniscus
is
easily
damaged.
For
patients
with
injuries,
it
necessary
to
repair
or
replace
patient's
meniscus.
However,
as
age
increases,
human
tissue
gradually
forms
cannot
be
repaired
through
its
own
Therefore,
maintain
movement
function
support
materials.
Objective
Traditional
materials
have
poor
mechanical
properties
biocompatibility.
response
this
issue,
study
designed
a
scaffold
made
of
silk
short
fibers,
fibroin,
wool
protein.
Methods
Through
electrospinning
freeze-drying
techniques,
material
was
processed
obtain
fiber
biomimetic
structure.
Results
experiments,
surface
morphology,
hydrophobicity,
porosity,
secondary
structure,
thermal
stability,
water
absorption
swelling,
MP
MCS
SSF
were
characterized.
Conclusion
The
experimental
results
show
that
manufactured
has
good
compressive
performance,
swelling
properties,
also
exhibits
