TY - JOUR
T1 - The effect of nanoperlite and its silane treatment on the crystallinity, rheological, optical, and surface properties of polypropylene/nanoperlite nanocomposite films
AU - Davachi, Seyed Mohammad
AU - Heidari, Behzad Shiroud
AU - Sahraeian, Razi
AU - Abbaspourrad, Alireza
PY - 2019/10/15
Y1 - 2019/10/15
N2 - Polypropylene nanocomposite films containing different contents of silane treated and untreated nanoperlite were fabricated using a corotating twin screw extruder and film blowing machine. The crystallinity, rheological, optical, morphological, and surface behavior of the resulting nanocomposites are characterized. We studied the crystallization and physical dispersion of nanoperlite in the polypropylene nanocomposite using X-ray diffraction, in which we observed that the peak intensity decreases gradually with increasing filler loading for both types (treated and untreated) of nanoperlite. However, the β-crystal phase of polypropylene was more affected in the treated nanoperlite nanocomposites. According to rheological studies, both types of nanocomposites show similar behavior at higher frequencies, and the nanoperlite type does not show any sign of effect at higher frequencies. However, in lower frequencies, they show different trends in complex viscosity. The contact angle and surface energy indicate the untreated nanoperlite nanocomposites demonstrate hydrophilic behavior, while the treated nanoperlite nanocomposites are hydrophobic. The silane treated nanoperlite improved the light transmittance and optical properties compared to the untreated nanoperlite. Finally, according to the morphological studies, the silane treated nanoperlite show better and finer dispersion in the polypropylene matrix. The results show that the silane treatment enhances the adhesion of the polypropylene/nanoperlite interfaces, suggesting the nanocomposite with 2% silane-treated nanoperlite could be a promising choice in food packaging industries.
AB - Polypropylene nanocomposite films containing different contents of silane treated and untreated nanoperlite were fabricated using a corotating twin screw extruder and film blowing machine. The crystallinity, rheological, optical, morphological, and surface behavior of the resulting nanocomposites are characterized. We studied the crystallization and physical dispersion of nanoperlite in the polypropylene nanocomposite using X-ray diffraction, in which we observed that the peak intensity decreases gradually with increasing filler loading for both types (treated and untreated) of nanoperlite. However, the β-crystal phase of polypropylene was more affected in the treated nanoperlite nanocomposites. According to rheological studies, both types of nanocomposites show similar behavior at higher frequencies, and the nanoperlite type does not show any sign of effect at higher frequencies. However, in lower frequencies, they show different trends in complex viscosity. The contact angle and surface energy indicate the untreated nanoperlite nanocomposites demonstrate hydrophilic behavior, while the treated nanoperlite nanocomposites are hydrophobic. The silane treated nanoperlite improved the light transmittance and optical properties compared to the untreated nanoperlite. Finally, according to the morphological studies, the silane treated nanoperlite show better and finer dispersion in the polypropylene matrix. The results show that the silane treatment enhances the adhesion of the polypropylene/nanoperlite interfaces, suggesting the nanocomposite with 2% silane-treated nanoperlite could be a promising choice in food packaging industries.
KW - Nanocomposite
KW - Nanoperlite
KW - Polypropylene
KW - Rheological properties
KW - Surface behavior
UR - http://www.scopus.com/inward/record.url?scp=85068233729&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2019.107088
DO - 10.1016/j.compositesb.2019.107088
M3 - Article
AN - SCOPUS:85068233729
SN - 1359-8368
VL - 175
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
M1 - 107088
ER -