Flexible, iridescent nanocrystalline cellulose film, and...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 1/00 (2006.01) B29D 7/01 (2006.01) C08J 5/18 (2006.01) C08L 9/08 (2006.01) C08L 29/04 (2006.01)

Patent

CA 2758042

Flexible nanocrystalline cellulose films (NCC) include a polymer while retaining the property of tunable colour. Polymers, for example PVOH and SB-latex, are effective in increasing the flexibility of the NCC films. The NCC film made with PVOH retains the iridescence better than that made with SB-latex; however, the NCC film made with SB-latex has a better tensile strength. In addition, the NCC film made with PVOH was found to disperse easily in water while the NCC film made with SB latex does not disperse in water (it is strongly water resistant). The colour of NCC film made with PVOH and SB-latex can still be tuned with techniques that provide for tuning.

L'invention concerne des films de cellulose nanocristallins flexibles (NCC), qui contiennent un polymère tout en conservant la propriété d'une couleur ajustable. Les polymères, par exemple le PVOH ou le latex SB, sont efficaces pour accroître la flexibilité des films NCC. Le film NCC fabriqué avec du PVOH conserve l'iridescence mieux que celui fabriqué avec un latex SB ; mais le film NCC fabriqué avec un latex SB a une meilleure résistance à la traction. Par ailleurs, il a été découvert que le film NCC fabriqué avec du PVOH se disperse facilement dans l'eau, tandis que le film NCC fabriqué avec un latex SB ne se disperse pas dans l'eau (il est fortement résistant à l'eau). La couleur du film NCC fabriqué avec du PVOH et du latex SB peut encore être ajustée avec des techniques qui permettent un ajustement.

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