期刊
CARBOHYDRATE POLYMERS
卷 87, 期 4, 页码 2464-2469出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2011.11.020
关键词
Bacterial cellulose; Nanocomposite; Physical; Mechanical; Dielectric
资金
- ABIP
- NSERC Manufacturing Network
- CG Tower
- Center of Excellence for Petroleum, Petrochemicals and Advanced Materials, Chulalongkorn University, Thailand
Nanocomposite films of bacterial cellulose (10-50 wt%) and polyurethane-based resin were prepared and characterized for physical, mechanical and dielectric properties. It was observed that the bacterial cellulose swelled in ethanol, and that bacterial cellulose sheets prepared from fibre suspension in ethanol exhibited a relatively less dense structure in comparison to those processed from aqueous fibre suspension. Nanocomposites fabricated from ethanol suspension also showed inferior mechanical properties but superior dielectric properties. Higher amounts of free proton generated from ethanol can induce more dipole mechanism; therefore, there is higher mobility of proton localized along cellulose chain, indicating that higher dielectric constants can be obtained. (C) 2011 Elsevier Ltd. All rights reserved.
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