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Published on: June 17, 2014
Characterization of carboxymethyl cellulose-based nanocomposite films reinforced with oxidized nanocellulose isolated
1Department of Food Engineering and Bionanocomposite Research Institute, Mokpo National University, 61 Dorimri, Chungkyemyon, Muangun, 534-729 Jeonnam, Republic of Korea; Food Engineering and Packaging Department, Food Technology Research Institute, Agricultural Research Center, Giza, Egypt.
Abstract:
Cellulose nanocrystals (CNCs) were isolated from cotton linter (CL) and microcrystalline cellulose (MCC) using an ammonium persulfate (APS) method for a simultaneous isolation and oxidation of CNCs. The CNCs were in rod-like shape with a diameter of 10.3nm and 11.4nm, a length of 120-150nm and 103-337nm, a crystallinity index of 93.5% and 79.1% for the CNCCL and CNCMCC, respectively. The suspensions of oxidized CNCs were transparent and stable with the zeta potential values of -50.6mV and -46.9mV. The CNCs were uniformly distributed within the carboxymethyl cellulose (CMC) polymer matrix. The tensile strength (TS) increased by 102% and 73%, and elastic modulus (E) increased by 228% and 166% with the incorporation of at 10wt% of CNCCL and CNCMCC, respectively. Conclusively, the CNCCL showed a more uniform particle size distribution, higher crystallinity, transparency, thermal stability, and superior mechanical strength compared with the CNCMCC.
