期刊
CARBOHYDRATE POLYMERS
卷 238, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.116198
关键词
Gelatin; Cellulose nanocrystals; Bionanocomposite films; Continuous casting; Scale-up; Physical properties
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
- National Network of Laboratories for Nanotechnology (SisNANO)
- Ministry of Science, Technology and Innovation (MCTI) [402287/2013-4]
- CNPq [303.796/2014-6, 402.287/2813-4]
- Sao Paulo Research Foundation (FAPESP) [2010/11584-5, 2012/21867-0, 2016/03080-3, 2018/00278-2]
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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