title: Impact of acid and oxidative modifications, single or dual, of sorghum starch on biodegradable films.
abstract: The objective of this study was to evaluate the effects of acid and oxidation modifications on sorghum starch, as well as the effect of dual modification of starch on the physical, morphological, mechanical, and barrier properties of biodegradable films. The acid modification was performed with 3% lactic acid and the oxidation was performed with 1.5% active chlorine. For dual modification, the acid modification was performed first, followed by oxidation under the same conditions as above. Both films of the oxidized starches, single and dual, had increased stiffness, providing a higher tensile strength and lower elongation when compared to films based on native and single acid modified starches. However, the dual modification increased the water vapor permeability of the films without changing their solubility. The increase in sorghum starch concentration in the filmogenic solution increased the thickness, water vapor permeability, and elongation of the films.
authors: 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: Bárbara
authors: B
authors: Biduski
authors: Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS 96010-900, Brazil. Electronic address: francine-ts@hotmail.com.
authors: Francine Tavares da
authors: FTD
authors: Silva
authors: Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS 96010-900, Brazil. Electronic address: wyller_m@hotmail.com.
authors: Wyller Max da
authors: WMD
authors: Silva
authors: 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: Shanise Lisie de Mello El
authors: SLME
authors: Halal
authors: Curso de Engenharia de Alimentos, Universidade Federal da Fronteira Sul, Laranjeiras do Sul, Paraná 85301970, Brazil. Electronic address: vania_vzp@hotmail.com.
authors: Vania Zanella
authors: VZ
authors: Pinto
authors: 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: Alvaro Renato Guerra
authors: ARG
authors: Dias
authors: 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: Elessandra da Rosa
authors: EDR
authors: Zavareze
mesh_terms: D063566:Biodegradable Plastics / Q000737:chemistry / Q000378:metabolism; D002523:Edible Grain / Q000737:chemistry / Q000378:metabolism; D010084:Oxidation-Reduction; D010539:Permeability; D012995:Solubility; D045868:Sorghum / Q000737:chemistry* / Q000378:metabolism*; D013213:Starch / Q000032:analysis* / Q000378:metabolism*; D013227:Steam / Q000032:analysis; D013718:Tensile Strength; D014961:X-Ray Diffraction
chemical_list: D063566:Biodegradable Plastics; D013227:Steam; D013213:Starch
keywords: Biodegradable films; Oxidation; Sorghum starch; Tensile strength; Water vapor permeability