Development of biocompatible flexible films with high barriers properties against water, grease and gases using smart reacto-chromatogenic nanoparticles, 2012 Advanced Coating Fundamentals Symposium

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Cellulose based products such as papers and boards are exceptionally versatile and attractive materials notably from the point of view of sustainability. Compared to their plastic film competitors, their application potential is however hampered by their lack of barrier resistance to water, grease and gases. Composite multilayer structures have then to be elaborated with an obvious, strong negative impact on sustainability. Chromatografting (or chromatogeny) has been shown to be able to provide a partial answer to this problem. It involves the molecular grafting of long chain natural fatty acids upon the external OH groups of cellulosic fibres. The resulting hydrophobic effect provides excellent barrier properties to liquid water while being fully compatible with paper sustainability. In this publication, we show that the application potential of chromatografting may be extended to grease and gases barrier thanks to the prior coating of specific PVOH layers. We further show that the barrier properties of chromatografted PVOH layers may be enhanced through the addition of PVOH coated particles coined “smart reacto-chromatogenic particles”.