Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/35542
Título: | Nanocomposite-forming solutions based on cassava starch and laponite: viscoelastic and rheological characterization |
Autor(es): | Valencia, Germán Ayala Moraes, Izabel Cristina Freitas Hilliou, L. Lourenço, Rodrigo Vinicius Sobral, Paulo José do Amaral |
Palavras-chave: | rheology cassava starch bionanocomposite Biodegradable films Nanoclay Nanoparticles Newtonian behavior Non-Newtonian behavior Thermal transition |
Data: | Dez-2015 |
Editora: | Elsevier 1 |
Revista: | Journal of Food Engineering |
Resumo(s): | Nanocomposites-forming solutions (NFS) based on cassava starch and laponite were prepared and next characterized by means of dynamic oscillatory and steady shear rheological tests to evaluate their ability to be processed by knife coating. The effects of speed (rpm) and homogenization time on the laponite dispersion characteristics were first analyzed. Laponite dispersions were affected by both process parameters. High speed (rpm), i.e. 20,000 or 23,000 rpm for 30 min or prolonged homogenization time (10,000 rpm 6 speed agitation 6 23,000 rpm, for 60 min) led to high f-potential values, with laponite particles size <80 nm. With addition of laponite nanoparticles to cassava starch dispersion, an evident transition in NFS from liquid-like viscous to solid-like elastic behavior was observed. Rheological results indicated that laponite nanoparticles induced new interactions with starch chains allowing to obtain a network structure typical of a semi-rigid gel which shows some spread ability. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/35542 |
DOI: | 10.1016/j.jfoodeng.2015.06.006 |
ISSN: | 0260-8774 |
Versão da editora: | http://www.sciencedirect.com/science/article/pii/S0260877415002617 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
jfe2015 laponite.pdf | author private copy | 2,03 MB | Adobe PDF | Ver/Abrir |