ACS Omega,
Journal Year:
2024,
Volume and Issue:
unknown
Published: March 9, 2024
Silver
nanoparticles
(Ag-NPs)
were
synthesized
by
using
the
polyol
method.
The
structural
and
morphological
characteristics
of
Ag-NPs
studied
X-ray
diffraction
(XRD)
field-emission
scanning
electron
microscopy
(FE-SEM).
XRD
analysis
revealed
formation
single-phase
polycrystalline
with
an
average
crystallite
size
lattice
constant
∼23
nm
4.07
Å,
respectively,
while
FE-SEM
shows
a
uniform
spherical
morphology.
Energy-dispersive
spectroscopy
confirmed
Ag-NPs,
no
extra
elements
detected.
A
strong
absorption
peak
at
∼427
was
observed
in
UV–vis
spectrum,
which
reflects
surface
plasmon
resonance
(SPR)
behavior
characteristic
Fourier-transform
infrared
(FTIR)
spectra
also
supported
EDX
results
regard
to
purity
prepared
Ag-NPs.
Anti-inflammatory
activity
tested
HRBCs
membrane
stabilization
heat-induced
hemolysis
assays.
antibacterial
evaluated
against
four
different
types
pathogenic
bacteria
disc
diffusion
method
(DDM).
Gram-negative
bacterial
strains
used
this
study
are
Escherichia
coli
(E.
coli),
Klebsiella,
Shigella,
Salmonella.
suggested
that
activities
have
influential
role
inhibiting
growth
bacteria,
thus
can
find
potential
application
pharmaceutical
industry.
International Journal of Biological Macromolecules,
Journal Year:
2024,
Volume and Issue:
282, P. 137180 - 137180
Published: Nov. 1, 2024
The
demand
for
non-toxic,
environmentally
friendly,
easily
processable,
water-resistant,
flame-retardant
and
antimicrobial
adhesives
in
the
wood
processing
industry
is
becoming
increasingly
urgent.
Few
can
possess
these
functions
altogether
while
being
synthesized
easily.
This
paper
presents
a
one-pot
process
utilizing
corn
starch,
sodium
hypochlorite,
itaconic
acid,
borax
to
synthesize
starch-based
adhesive
with
dual
crosslinking.
Initial
crosslinking
takes
place
between
carboxyl
groups
of
acid
hydroxyl
on
oxidized
starch
due
formation
ester
bonds.
Secondary
by
borate
bonds
occurs
boric
acid.
entire
reaction
benign,
generating
no
waste,
all
reactants
converted
into
final
products,
aligning
"green"
chemistry
principles.
When
used
bond
wooden
boards,
this
achieved
dry
shear
strength
5.34
±
0.24
MPa,
wet
1.22
0.06
MPa
after
soaking
water.
Additionally,
exhibited
antibacterial
properties
against
Escherichia
coli
(ATCC
8739)
Staphylococcus
aureus.
Moreover,
incorporated,
demonstrated
flame-retardancy.
limiting
oxygen
index
bonded
boards
was
30.9
%,
qualifying
it
as
material.
These
multiple
render
promising
applications
industry.
Due
to
the
finite
nature
of
fossil
resources
and
increasing
environmental
regulations
on
formaldehyde
emissions,
as
well
growing
public
health
concerns,
China's
wood
industry
is
in
urgent
need
developing
environmentally
friendly
adhesives
derived
from
renewable
natural
resources.
The
utilization
vegetable
protein
a
raw
material
for
shows
great
potential;
however,
its
limited
bond
strength
water
resistance
hinder
extensive
application
production
composites.
objective
this
investigation
was
enhance
adhesion
properties
peanut
protein-based
adhesive
through
incorporation
formaldehyde-free
urea-glyoxal
(UG)
resin
into
curing
system.
optimal
composition
ratio
systematically
investigated
achieve
highest
performance.
results
demonstrate
that
UG
undergoes
co-condensation
reaction
with
molecules,
resulting
formation
an
imine
bridge
during
hot
pressing
process.
solidified
forms
densely
packed
water-resistant
structure
both
covalent
noncovalent
interactions.
Among
them,
PP20-UG30-2.2
binder
exhibits
superior
bonding
performance,
respective
strengths
1.62
(dry
strength),
1.39
(cold
1.32
(hot
0.3
MPa
(boiling
strength).
This
not
only
surpasses
national
standard
requirements
(≥0.7
MPa)
but
also
outperforms
most
plant
adhesives.
In
general,
successful
combination
has
demonstrated
synergistic
effect,
surpassing
sum
their
individual
contributions.
advancement
significantly
propelled
progress
high-performance
based
proteins.
