Journal
CARBOHYDRATE POLYMERS
Volume 150, Issue -, Pages 187-200Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.05.020
Keywords
Rice straw; Wheat straw; Barley straw; Cellulose nanocrystals; Carboxymethyl cellulose; Bio-nanocomposite
Categories
Funding
- Mokpo National University
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Cellulose nanocrystals (CNCs) were isolated from rice straw (RS), wheat straw (WS), and barley straw (BS) by using acid hydrolysis method. They were fibrous in shape with length (L) of 120-800 nm and width (W) of 10-25 nm, aspect ratio (L/W) of 18, 16 and 19, crystallinity index (CI) of 0.663, 0.710, and 0.634, and yield of 64, 75, and 69 wt% for RS, WS, and BS respectively. Carboxymethyl cellulose (CMC)/CNC composite films were prepared with various concentration of the CNCs. SEM results showed that the CNCs were evenly distributed in the polymer to form homogeneous films. Mechanical and water vapor barrier properties were varied depending on the type of CNCs and their concentration. Tensile strength (TS) increased by 45.7%, 25.2%, and 42.6%, and the water vapor permeability (WVP) decreased by 26.3%, 19.1%, and 20.4% after forming composite with 5 wt% of CNCs obtained from RS, WS, and BS, respectively. (C) 2016 Elsevier Ltd. All rights reserved.
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