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Protein Composite Materials by Crystallization: Product and Process Design
Author(s) -
Frohberg Patrick,
Ulrich Joachim
Publication year - 2015
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201400720
Subject(s) - orthorhombic crystal system , composite number , crystallization , materials science , ultimate tensile strength , extrusion , chemical engineering , elongation , potassium nitrate , phase (matter) , reactive extrusion , composite material , chemistry , potassium , crystallography , crystal structure , metallurgy , organic chemistry , engineering
The product and process design of protein composite materials continuously produced by reactive extrusion are studied in detail. A suitable process design and operating window are presented. Potassium nitrate (KNO 3 ) was used as a model additive and as a tool for modifying the physiochemical properties of the extruded protein films. The crystalline structures were identified and correlated to the tensile properties of the films. Uniformly distributed trigonal phase‐III KNO 3 crystals were observed within the film, which led to significantly higher elongation values of the films. Appropriate downstream operations are able to prevent the undesired polymorph transition to the orthorhombic phase II of KNO 3 which would strongly reduce the mechanical performance.