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Development of new barrier materials using microfibrillated cellulose

Abstract : This study takes place in a context of development of paper-based barrier packaging materials, using of microfibrillated cellulose (MFC) that brings renewability, recyclability, and biodegradability. Two strategies have been investigated: the wet lamination of a MFC barrier layer on board, and the use of MFC as additive in a water-based barrier coating colour. The promising use of MFC for the formation of barrier layers has been demonstrated in both cases. The wet lamination of MFC on board led to good oxygen and grease barrier properties, using highly fibrillated MFC. The board-MFC complex presented a strong adhesion after drying, without requiring glue. In the case of barrier coating, in order to obtain a low viscosity suspensions leading to high barrier layers, the use of highly fibrillated MFC mixed with a fully-hydrolysed poly(vinyl alcohol (PVOH) of low degree of polymerisation has been preferred. The addition of MFC in PVOH demonstrated its potential for improving the drying behaviour of water-barrier barrier coating colours. The combined use of MFC and layered silicates evidenced a synergistic effect on their dispersion in a PVOH solution, leading to an improved water vapour barrier while avoiding the formation of aggregates that otherwise damage the oxygen barrier. The work contributed to demonstrate the potential of MFC to be used for the formation of barrier layers, paving the way for the development of more sustainable barrier packaging materials.
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Submitted on : Tuesday, May 22, 2018 - 9:19:06 AM
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  • HAL Id : tel-01796806, version 1




Sébastien Raynaud. Development of new barrier materials using microfibrillated cellulose. Material chemistry. Université Grenoble Alpes, 2017. English. ⟨NNT : 2017GREAI058⟩. ⟨tel-01796806⟩



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