Paper coating performance of hemicellulose-rich natural polymer from distiller's grains |
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| Affiliation: | 1. Department of Sustainable Bioproducts, Mississippi State University, Starkville, MS, United States;2. Faculty of Forestry, University of Toronto, Toronto, ON, Canada;3. FPInnovations, Pointe-Claire, QC, Canada;4. CIRCERB Université Laval, Quebec City, QC, Canada;5. Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, QC, Canada;1. Department of Food Engineering, Engineering Faculty, Ondokuz Mayıs University, 55139, Samsun, Turkey;2. Department of Food Engineering, Engineering and Architecture Faculty, Bitlis Eren University, 13000 Bitlis, Turkey;3. Department of Food Engineering, Chemistry—Metallurgical Faculty, Yildiz Technical University, 34210 Istanbul, Turkey;1. Department of Food Technology, Jamia Hamdard, New Delhi, India;2. Centre for Rural Development and Technology, IIT Delhi, New Delhi, India;3. Indian Institute of Packaging, Mumbai, India;4. Department of Chemistry, Jamia Hamdard, New Delhi, India;1. Cellulose and Paper Department, National Research Centre, 33 El-Bohouth Street, Dokki, Giza 12622, Egypt;2. Advanced Materials and Nanotechnology Group, Centre of Excellence for Advanced Sciences, National Research Centre, 33 El-Bohouth Street, Dokki, Giza 12622, Egypt |
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| Abstract: | Coatings contribute to about 10% of the overall cost of paper production of which, the binder is the highest cost component in the formulation. In addition to costs, the binders that are currently being used are synthesized from fossil fuel feedstock raising concerns towards the sustainability of paper coatings. Furthermore, papers coated with waxes, polyolefins and other synthetic materials are difficult to recycle or compost. These challenges inherent with synthetic binders can be addressed by using renewable, plant based binders. This research focused on an abundant and underutilized source of hemicellulose based binders (DG gum) that can be extracted from distiller's dried grains. The extracted binder was compared with polyvinyl alcohol (PVA) in a coating formulation consisting of 10:1 CaCO3 to binder formulation coated on light weight paper. Cobb test, dry and wet tensile tests, optical properties (brightness, color, opacity), water vapor transmission rate (WVTR) analysis were performed to compare the hemicellulose based binder with PVA. The results indicate water absorptivity reduction by 25% for both DG gum and PVA coatings from the base paper value. Dry tensile index was lower with higher coating weights for both coatings with similar performance. The performance on WVTR analysis for both coatings was also comparable. No significant differences in optical properties after coating were observed from that of the base paper. These results suggest that hemicellulose based binder extracted from distiller's grains has the potential to replace synthetic binders in paper coating formulations. |
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| Keywords: | Distiller's grains Paper coating Polymer Binder Hemicellulose Organic coating |
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