title: Preparation and characterization agar-based nanocomposite film reinforced by nanocrystalline cellulose.
abstract: Nanocrystalline cellulose (NCC) was prepared from microcrystalline cellulose (MCC) with particle size of 24.7 μm using sulfuric acid hydrolysis technique. The obtained NCC revealed size of 0-100 nm, which the major part of them was about 30 nm. Then different contents (2.5, 5 and 10 wt%) of these NCC incorporated in agar film solution and the morphology, structure, and properties of the nanocomposite films were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transforms infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), mechanical, physical and optical testing. Results showed that the water vapor permeability (WVP) and water solubility (WS) of the agar-based nanocomposite films significantly (P<0.05) decreased about 13% and 21%, respectively, upon increasing the NCC content to 10%. Tensile strength (TS) and Young's modulus (YM) values of nanocomposite films significantly increased (P≤0.05) with addition of NCC, whereas the elongation percent (E%) decreased not significantly (P>0.05). In addition, swelling percentage, transparency and light transmission of the films were decreased by incorporating NCC into polymer matrix.
authors.affiliation: Department of Seafood processing, Faculty of Marine Sciences, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Atef
authors.affiliation: Department of Seafood processing, Faculty of Marine Sciences, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran. Electronic address: rezai_ma@modares.ac.ir.
authors.forename: Masoud
authors.initials: M
authors.lastname: Rezaei
authors.affiliation: Department of Wood and Paper Technology, Faculty of Natural Resource, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran.
authors.forename: Rabi
authors.initials: R
authors.lastname: Behrooz
mesh_terms: D000362:Agar / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D055595:Mechanical Phenomena; D018625:Microscopy, Atomic Force; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D010539:Permeability; D012995:Solubility; D013227:Steam; D013816:Thermodynamics; D014783:Viscosity; D014961:X-Ray Diffraction
chemical_list: D013227:Steam; D000362:Agar; D002482:Cellulose; C109691:microcrystalline cellulose
keywords: Agar; Mechanical properties; Nanocomposite films; Nanocrystalline cellulose