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Film extrusion of sunflower protein isolate
Author(s) -
Rouilly Antoine,
Mériaux Alexandra,
Geneau Céline,
Silvestre Françoise,
Rigal Luc
Publication year - 2006
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20634
Subject(s) - plasticizer , materials science , extrusion , swelling , ultimate tensile strength , glycerol , composite material , water content , sunflower , chemistry , geotechnical engineering , mathematics , organic chemistry , combinatorics , engineering
Film extrusion of sunflower protein isolate (SFPI) was studied. The influence of die temperature (85–160°C), water and glycerol contents were investigated through appearance, mechanical and thermomechanical properties, and swelling behavior in water of films. It was demonstrated that highest temperature, well above SFPI denaturation temperature in the compound, highest glycerol content (70 parts for 100 parts of SFPI), and medium water content (20 parts for 100 parts of SFPI) gave the most regular and smoothest film (as seen on SEM micrographs). Its ultimate tensile strength, Young's modulus, and strain at break were, respectively, 3.2 MPa, 17.7 MPa, and 73%. Soaked in water, its swelling was about 186% w/w but the film was quiet insoluble. Effect of temperature and plasticizer content were discussed in relation to the kinetic of SFPI denaturation. These first results are very promising for the development of biodegradable protein‐based films. POLYM. ENG. SCI. 46:1635–1640, 2006. © 2006 Society of Plastics Engineers.