Injection-molded nanocomposites and materials based on wheat gluten

被引:75
作者
Cho, S-W. [1 ]
Gallstedt, M. [2 ]
Johansson, E. [3 ]
Hedenqvist, M. S. [1 ]
机构
[1] Royal Inst Technol, SE-10044 Stockholm, Sweden
[2] Innventia, SE-11486 Stockholm, Sweden
[3] Swedish Univ Agr Sci, Fac Landscape Planning Hort & Agr Sci, SE-23053 Alnarp, Sweden
关键词
Injection molding; Nanocomposites; Wheat gluten; Montmorillonite; Mechanical properties; SECONDARY STRUCTURE; SOY PROTEIN; TEMPERATURE; GLYCEROL; PLASTICS; FILM;
D O I
10.1016/j.ijbiomac.2010.10.012
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
This is, to our knowledge, the first study of the injection molding of materials where wheat gluten (WG) is the main component. In addition to a plasticizer (glycerol), 5 wt.% natural montmorillonite clay was added. X-ray indicated intercalated clay and transmission electron microscopy indicated locally good clay platelet dispersion. Prior to feeding into the injection molder, the material was first compression molded into plates and pelletized. The filling of the circular mold via the central gate was characterized by a divergent flow yielding, in general, a stronger and stiffer material in the circumferential direction. It was observed that 20-30 wt.% glycerol yielded the best combination of processability and mechanical properties. The clay yielded improved processability, plate homogeneity and tensile stiffness. IR spectroscopy and protein solubility indicated that the injection molding process yielded a highly aggregated structure. The overall conclusion was that injection molding is a very promising method for producing WG objects. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:146 / 152
页数:7
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