title: Acetylated rice starches films with different levels of amylose: Mechanical, water vapor barrier, thermal, and biodegradability properties.
abstract: Biodegradable films from native or acetylated starches with different amylose levels were prepared. The films were characterized according to the mechanical, water vapor barrier, thermal, and biodegradability properties. The films from acetylated high amylose starches had higher moisture content and water solubility than the native high amylose starch film. However, the acetylation did not affect acid solubility of the films, regardless of the amylose content. Films made from high and medium amylose rice starches were obtained; however low amylose rice starches, whether native or acetylated, did not form films with desirable characteristics. The acetylation decreased the tensile strength and increased the elongation of the films. The acetylated starch-based films had a lower decomposition temperature and higher thermal stability than native starch films. Acetylated starches films exhibited more rapid degradation as compared with the native starches films.
authors.affiliation: Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS 96010-900, Brazil. Electronic address: rosana_colussi@yahoo.com.br.
authors.forename: Rosana
authors.initials: R
authors.lastname: Colussi
authors.affiliation: Curso de Engenharia de Alimentos, Universidade Federal da Fronteira Sul, Laranjeiras do Sul, Paraná 85301970, Brazil. Electronic address: vania_vzp@hotmail.com.
authors.forename: Vânia Zanella
authors.initials: VZ
authors.lastname: Pinto
authors.affiliation: Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS 96010-900, Brazil. Electronic address: shanisemell@hotmail.com.
authors.forename: Shanise Lisie Mello
authors.initials: SLM
authors.lastname: El Halal
authors.affiliation: Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS 96010-900, Brazil. Electronic address: babi_biduski@hotmail.com.
authors.forename: Bárbara
authors.initials: B
authors.lastname: Biduski
authors.affiliation: Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS 96010-900, Brazil. Electronic address: lucianaprietto@gmail.com.
authors.forename: Luciana
authors.initials: L
authors.lastname: Prietto
authors.affiliation: Departamento de Solos, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS 96010-900, Brazil. Electronic address: danilodc@ufpel.edu.br.
authors.forename: Danilo Dufech
authors.initials: DD
authors.lastname: Castilhos
authors.affiliation: Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS 96010-900, Brazil. Electronic address: elessandrad@yahoo.com.br.
authors.forename: Elessandra da Rosa
authors.initials: EDR
authors.lastname: Zavareze
authors.affiliation: Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS 96010-900, Brazil. Electronic address: alvaro.guerradias@gmail.com.
authors.forename: Alvaro Renato Guerra
authors.initials: ARG
authors.lastname: Dias
mesh_terms: D000107:Acetylation; D000688:Amylose / Q000032:analysis*; D006358:Hot Temperature; D015394:Molecular Structure; D012275:Oryza / Q000737:chemistry*; D012995:Solubility; D013213:Starch / Q000737:chemistry*; D013227:Steam; D013718:Tensile Strength
chemical_list: D013227:Steam; D013213:Starch; D000688:Amylose
keywords: Acetylation; Amylose content; Biodegradable films; Rice starch; Tensile strength; Thermal stability