Study of process parameters for starch,gluten, and glycerol mixtures |
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| Authors: | Elisângela Corradini Luís C de Morais Nicole R Demarquette José A M Agnelli Luiz H C Mattoso |
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| Institution: | 1. Departamento de Engenharia de Materiais, UFSCar, 13565‐905, S?o Carlos/SP, Brazil;2. EMBRAPA Instrumenta??o Agropecuária, 13560‐970 S?o Carlos, SP, BrazilEMBRAPA Instrumenta??o Agropecuária, Rua XV de Novembro, 1452, Centro, CEP 13560‐970, S?o Carlos, SP, Brazil.;3. Departamento de Ciências de Natureza, UFAC, 69915‐000, Rio Branco/AC, Brazil;4. Departamento de Metalurgia e Engenharia de Materiais, Escola Politécnica da USP/SP, 05508‐900 S?o Paulo/SP, Brazil;5. EMBRAPA Instrumenta??o Agropecuária, 13560‐970 S?o Carlos, SP, Brazil |
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| Abstract: | This work involved a study of the effect of processing variables (temperature, water content, rotor speed, and time) on the mechanical properties of starch:gluten:glycerol mixtures in the weight ratio of 40:40:20. The properties of the materials were affected by the processing variables. The torque decreased with water content, indicating that water facilitates the plasticization of mixtures, whereas the increase in temperature accelerated the evaporation of water, thus increasing the torque. Ultimate tensile strength was achieved at the lowest temperature (110°C) and the highest water content (20%), whereas maximum elongation was achieved for the material processed at the highest temperature, 150°C, and the fastest rotor speed, 70 rpm. Copyright © 2007 John Wiley & Sons, Ltd. |
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| Keywords: | biopolymers response surface methodology processing mechanical properties |
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