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Starch‐graphene oxide bionanocomposites prepared through melt mixing
Author(s) -
ÁvilaOrta Carlos A.,
Soriano Corral Florentino,
FonsecaFlorido Heidi A.,
Estrada Aguilar Flor I.,
Solís Rosales Silvia G.,
Mata Padilla José M.,
González Morones Pablo,
Fernández Tavizón Salvador,
HernándezHernández Ernesto
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46037
Subject(s) - thermogravimetric analysis , materials science , graphene , scanning electron microscope , exfoliation joint , composite material , thermal stability , oxide , starch , thermoplastic , ultimate tensile strength , graphite oxide , chemical engineering , nanotechnology , chemistry , organic chemistry , engineering , metallurgy
Bionanocomposites (BNCs) of waxy corn starch, glycerol, and graphene oxide (GO) or graphite oxide (GrO) were prepared by melt mixing. First, the GrO was pre‐exfoliated in a water solution using ultrasound at 1 wt %. Small‐angle X‐ray scattering was used to determinate the interlaminar separation of GrO and transmission electron microscopy, Fourier infrared spectroscopy, and thermogravimetric analysis were used to characterized the GrO. Next, BNCs were characterized by X‐ray diffraction, scanning electron microscopy, thermogravimetric analysis, and mechanical property measurements. A complete exfoliation of GrO was obtained in the waxy corn matrix. Amorphous X‐ray patterns of the BNCs were observed, indicating that the exfoliated GO avoid the retrogradation of starch. According to scanning electron microscopy results, the BNCs showed an irregular texture and a good dispersion of GO, while thermoplastic starch showed a smooth morphology with a fragile structure. The BNCs exhibited higher thermal stability than thermoplastic starch. The tensile strength and the Young's modulus increased by 140% and 230% at a GO loading levels of 0.5% due to good interfacial interactions of GO and the waxy corn starch matrix. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46037.