title: Impregnation of cinnamaldehyde into cassava starch biocomposite films using supercritical fluid technology for the development of food active packaging.
abstract: In this work, supercritical solvent impregnation (SSI) has been tested for the incorporation of natural compounds into biocomposite materials for food packaging. Cinnamaldehyde, with proved antimicrobial activity against fungi commonly found in bread products, was successfully impregnated on biocomposite cassava starch based materials using supercritical carbon dioxide as solvent. Different process experimental conditions were tested (pressure, impregnation time and depressurization rate) at a fixed temperature (35 °C) in order to study their influence on the amount of impregnated cinnamaldehyde as well as on the morphology of the films. Results showed that all conditions permitted to impregnate antimicrobial active amounts superior to those previously obtained using conventional incorporation methods. Moreover, a significant decrease of the equilibrium water vapor sorption capacity and water vapor permeability of the films was observed after SSI processing which is a clear advantage of the process, considering the envisaged applications.
authors: Department of Chemical Engineering, EP, University of São Paulo, Av. Prof. Luciano Gualberto, Travessa 3, 380, 05508-010 São Paulo, SP, Brazil.
authors: Ana Cristina
authors: AC
authors: de Souza
authors: CIEPQPF, Chemical Engineering Department, FCTUC, University of Coimbra, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal.
authors: Ana M A
authors: AM
authors: Dias
authors: CIEPQPF, Chemical Engineering Department, FCTUC, University of Coimbra, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal.
authors: Hermínio C
authors: HC
authors: Sousa
authors: Department of Chemical Engineering, EP, University of São Paulo, Av. Prof. Luciano Gualberto, Travessa 3, 380, 05508-010 São Paulo, SP, Brazil; University of São Paulo, NAPAN, Food and Nutrition Research Center, Brazil. Electronic address: catadini@usp.br.
authors: Carmen C
authors: CC
authors: Tadini
mesh_terms: D000171:Acrolein / Q000031:analogs & derivatives* / Q000737:chemistry; D025924:Chromatography, Supercritical Fluid / Q000379:methods*; D018857:Food Packaging; D002365:Manihot / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010539:Permeability; D017550:Spectroscopy, Fourier Transform Infrared; D013213:Starch / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water; D000171:Acrolein; D013213:Starch; C012843:cinnamaldehyde
keywords: Antimicrobial agent; Cassava starch; Food packaging; Supercritical solvent impregnation