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    Scaled-up production of gelatin-cellulose nanocrystal bionanocomposite films by continuous casting

    Year: 2020

    Journal: Carbohydr. Polym., Volume 238, JUN 15

    Authors: Leite, Liliane S. F.; Ferreira, Caio M.; Correa, Ana C.; Moreira, Francys K., V; Mattoso, Luiz H. C.

    Organizations: Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES)Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [001]; National Network of Laboratories for Nanotechnology (SisNANO); Ministry of Science, Technology and Innovation (MCTI) [402287/2013-4]; CNPqConselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) [303.796/2014-6, 402.287/2813-4]; Sao Paulo Research Foundation (FAPESP)Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2010/11584-5, 2012/21867-0, 2016/03080-3, 2018/00278-2]

    Keywords: Gelatin; Cellulose nanocrystals; Bionanocomposite films; Continuous casting; Scale-up; Physical properties

    In this study, continuous casting is proposed as a suitable approach to scale up the production of gelatin-cellulose nanocrystals (CNCs) bionanocomposites. The processing conditions and bionanocomposite properties were established based on the -potential and gelatin content, and CNCs concentration, respectively. Gelatin film-forming solution at 20 wt% was required for proper continuous casting processing, leading to a productivity of 0.20 m(2) film/min, which was at least 1000-fold higher than that of the classical bench casting. The gelatin-CNCs bionanocomposites displayed transparency, flexibility, and improved UV-barrier and thermal properties. Adding only 0.5 wt% of CNCs resulted in an increase of 77 % and 48 % in the tensile strength and Young's modulus of gelatin, respectively. Comparison with previous nanocellulose-based nanocomposites pointed out the relatively superior performance of the gelatin-CNCs bionanocomposites obtained by continuous casting for various applications, including flexible food packaging.
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