Journal
CARBOHYDRATE POLYMERS
Volume 174, Issue -, Pages 484-492Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.06.121
Keywords
Ammonium persulfate; Oxidized cellulose; Cellulose nanocrystals; Carboxymethyl cellulose film; Nanocomposite film
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Funding
- Agriculture Research Center program of the Ministry of Agriculture, Food and Rural Affairs, Korea [ARC 710003]
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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 10.3 nm and 11.4 nm, a length of 120-150 nm and 103-337 nm, 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 -50.6 mV and 46.9 mV. 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 10 wt% 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. (C) 2017 Elsevier Ltd. All rights reserved.
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