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Preparation and Characterization of Agar/Clay Nanocomposite Films: The Effect of Clay Type
Author(s) -
Rhim JongWhan,
Lee SooBin,
Hong SeokIn
Publication year - 2011
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1750-3841.2011.02049.x
Subject(s) - nanocomposite , ultimate tensile strength , materials science , agar , elongation , composite material , chemical engineering , bacteria , genetics , engineering , biology
Agar‐based nanocomposite films with different types of nanoclays, such as Cloisite Na + , Cloisite 30B, and Cloisite 20A, were prepared using a solvent casting method, and their tensile, water vapor barrier, and antimicrobial properties were tested. Tensile strength (TS), elongation at break (E), and water vapor permeability (WVP) of control agar film were 29.7 ± 1.7 MPa, 45.3 ± 9.6%, and (2.22 ± 0.19) × 10 −9 g·m/m 2 ·s·Pa, respectively. All the film properties tested, including transmittance, tensile properties, WVP, and X‐ray diffraction patterns, indicated that Cloisite Na + was the most compatible with agar matrix. TS of the nanocomposite films prepared with 5% Cloisite Na + increased by 18%, while WVP of the nanocomposite films decreased by 24% through nanoclay compounding. Among the agar/clay nanocomposite films tested, only agar/Cloisite 30B nanocomposite film showed a bacteriostatic function against Listeria monocytogenes .