Mokhothu, Thabang HJohn, Maya J2018-01-312018-01-312017-10Mokhothu, T.H. and John, M.J. 2017. Bio-based coatings for reducing water sorption in natural fibre reinforced composites. Scientific Reports, vol. 7, article 13335. doi:10.1038/s41598-017-13859-22045-2322doi:10.1038/s41598-017-13859-2https://www.nature.com/articles/s41598-017-13859-2http://hdl.handle.net/10204/10007Article published in Scientific Reports, vol. 7: DOI:10.1038/s41598-017-13859-2In this study, bio-based coatings were used for reducing water sorption of composites containing flame retardant treated natural fibres and phenolic resin. Two types of coatings; polyfurfuryl alcohol resin (PFA) and polyurethane (PU) were used on the composites and compared with a water resistant market product. Uncoated and coated samples were conditioned at 90 °C and relative humidity of 90% for three days and the relative moisture content and mechanical properties after conditioning were analysed. In addition, the changes in the weight loss of the conditioned samples were also investigated by thermogravimetric analysis. The moisture diffusion characteristics of coated laminates were also studied at room temperature under water immersion conditions. PFA coated samples showed better moisture resistance and mechanical performance than other bio-based coatings when subjected to long term environmental aging.enBio-based coatingsNatural fibre reinforced compositesPhenolic compositesArticleMokhothu, T. H., & John, M. J. (2017). Bio-based coatings for reducing water sorption in natural fibre reinforced composites. http://hdl.handle.net/10204/10007Mokhothu, Thabang H, and Maya J John "Bio-based coatings for reducing water sorption in natural fibre reinforced composites." (2017) http://hdl.handle.net/10204/10007Mokhothu TH, John MJ. Bio-based coatings for reducing water sorption in natural fibre reinforced composites. 2017; http://hdl.handle.net/10204/10007.TY - Article AU - Mokhothu, Thabang H AU - John, Maya J AB - In this study, bio-based coatings were used for reducing water sorption of composites containing flame retardant treated natural fibres and phenolic resin. Two types of coatings; polyfurfuryl alcohol resin (PFA) and polyurethane (PU) were used on the composites and compared with a water resistant market product. Uncoated and coated samples were conditioned at 90 °C and relative humidity of 90% for three days and the relative moisture content and mechanical properties after conditioning were analysed. In addition, the changes in the weight loss of the conditioned samples were also investigated by thermogravimetric analysis. The moisture diffusion characteristics of coated laminates were also studied at room temperature under water immersion conditions. PFA coated samples showed better moisture resistance and mechanical performance than other bio-based coatings when subjected to long term environmental aging. DA - 2017-10 DB - ResearchSpace DP - CSIR KW - Bio-based coatings KW - Natural fibre reinforced composites KW - Phenolic composites LK - https://researchspace.csir.co.za PY - 2017 SM - 2045-2322 T1 - Bio-based coatings for reducing water sorption in natural fibre reinforced composites TI - Bio-based coatings for reducing water sorption in natural fibre reinforced composites UR - http://hdl.handle.net/10204/10007 ER -