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    Reactive coating of soybean oil-based polymer on nanofibrillated cellulose film for water vapor barrier packaging

    Year: 2014

    Journal: CARBOHYDRATE POLYMERS, Vol. 111, p 524-529, 20150722

    Authors: Lu, Peng; Xiao, Huining; Zhang, Weiwei; Gong, Glen

    Organizations: Univ New Brunswick, Dept Chem Engn, Fredericton, NB E3B 5A3, Canada; Univ New Brunswick, Limerick Pulp & Paper Ctr, Fredericton, NB E3B 5A3, Canada; S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 500640, Guangdong, Peoples R China; Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada

    Nanofibrillated cellulose (NFC) easily forms a high strength film but is unable to withstand the influence of water vapor when used in high moisture situations. The water vapor transmission rate (WVTR) of a NFC film was as high as 5088 g/m(2) 24h (38 degrees C, 90% RH). The addition of beeswax latex in a NFC casting film (NFX) lowered the WVTR to 3918 g/m(2) 24 h. To further reduce the WVTR, a coating agent comprised of acrylated epoxidized soybean oil (AESO) and 3-aminopropyltriethoxysilane (APTS) was applied onto the NFX film using a rod coater. A combination of the suitable AESO/APTS ratio, initiator dosing, curing time and temperature could reduce the WVTR to 188 g/m(2) 24 h when the coat weight was 5 g/m(2). Moreover, the coated NFX film was highly hydrophobic along with the improved transparency and thermal stability. This biodegradable polymer-coated NFC film can be used as potential packaging barrier in certain areas. (C) 2014 Elsevier Ltd. All rights reserved.