Page 46 - PR 2014 2016 10 Materials and Nanotechnology

322 Materials and Nanotechnology | Progress Report

the clay concentration in the nanocomposite blow extrusion and evaluated. Nanoclay inter-
hydrogels. The blend PVP/PVAl proved to have calation/exfoliation degree was investigated
mechanical properties of stress tensile modu- by X-ray diffraction spectroscopy (XRD) and
lus higher than PVAl nanocomposite and high- scanning electron microscopy (SEM). Mechan-
er elongation compared to PVP nanocompos- ical and thermal properties were evaluated.
ites. Hydrogels of PVP were formulated with The results showed optimum dispersion at
neomycin followed by radiation in gamma intercalation/exfoliation levels for polyeth-
source for crosslink and sterilization. The an- ylene nanocomposite (PENC), slight increasing
tibiotic neomycin released from the hydrogel in mechanical and especially improvement
crosslinked membranes was determined by in thermal properties. Polyethylene is widely
Liquid Chromatography – Mass Spectrome- used for packing applications. Different grades
try. The drug is released in the 20h of essay. of polyethylene, LLDPE and LDPE play a ma-
Hydrogel/neomycin exhibited antibacterial jor role in the film blowing industry. The use
of nanoclay in polymer matrices (non-polar)
requires the use of a compatibilizer agent,
ethylene graft maleic anhydride copolymer
(PE-g-MA), which acts as a bridge for nano-
clay-matrix-interaction. In our study, blown
films of LLDPE, LDPE, and their blends were
activity effects against Stephylococus aureus produced using a twin screw extruder. The
and Pseudomonas aeruginosa, Figure 53. combination of PEs as matrix, montmorillon-
ite (MMT) and silver nanoparticles (AgNPs)
Figure 53. (A/B/C). Antibacterial results of intended to improve mechanical and thermal
activity against: control(A), P aeruginsa (B); properties. Nanocomposites films with 1 wt%
S. aureus (C), after 24 h of incubation at 37°C. of montmorillonite and 0.5–1.0 wt% silver
nanoparticles were prepared by blow extru-
Polymeric films for antibacterial activity sion and evaluated. Nanoclay intercalation/
exfoliation degree was investigated by X-ray
Polyethylene is widely used for packing ap- diffraction spectroscopy (XRD) and scanning
plications. Different grades of polyethylene, electron microscopy (SEM). Mechanical and
LLDPE and LDPE play a major role in the film thermal properties were evaluated. The re-
blowing industry. The use of nanoclay in poly- sults showed optimum dispersion at inter-
mer matrices (non-polar) requires the use of calation/exfoliation levels for polyethylene
a compatibilizer agent, ethylene graft maleic nanocomposite (PENC), slight increasing in
anhydride copolymer (PE-g-MA), which acts mechanical and especially improvement in
as a bridge for nanoclay-matrix-interaction. thermal properties.
In our study, blown films of LLDPE, LDPE, and
their blends were produced using a twin screw X-ray diffraction spectroscopy of sample PENC/
extruder. The combination of PEs as matrix, AgNP1.0% showed intercalated morphology.
montmorillonite (MMT) and silver nanoparti- The results with MMT indicated the formation
cles (AgNPs) intended to improve mechanical of microstructures predominantly exfoliated
and thermal properties. Nanocomposites films in film PENC1. In SEM/EDS microscopy the
with 1 wt% of montmorillonite and 0.5–1.0 morphology of the silver/clay particles with
wt% silver nanoparticles were prepared by homogeneous distribution. The film PENC/

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