Biodegradable corn starch loose- fill. I. The effect of the extrusion temperature on the physical properties of loose-fill |
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| Authors: | Dae-lyoung Lim Seung-soon Im Jeong-seok Han Sang-hyun Yim Jin-sung Kim Young-mok Lee |
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| Institution: | (1) Department of Textile Engineering, College of Engineering, Han- yang University, 17 Haengdang-dong, 133-791 Seongdong-gu, Seoul, Korea;(2) Sam Yang Genex Research Institute, 63-2 Hwaam-dong, 305-348 Yusunggu, Taejeon, Korea;(3) Department of Textile, Bucheon Technical College, 424 Simgogdong, 421-010 Wonmi-gu, Bucheon, Kyoungkido, Korea |
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| Abstract: | Extrusion with an intermeshing corotating twin-screw extruder with a limited amount of water caused structural changes in
corn starch. The structural changes resulted in a transformation-from a semicrystalline to an amorphous state and the development
of orientation of molecular chains in the amorphous region during extrusion. These structural changes, in turn, caused an
increase in theT
g, tensile strength, and resilience of the extruded corn starch. Our experimental results showed that the tensile properties
and resilience of the expanded corn starch extruded at 240‡C were the best: tensile strength, 1.7 kPa; tensile modulus, 40.4
kPa; and resilience, 57.2%. Extrusion produced an expanded corn starch suitable for protective loose-fill. |
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| Keywords: | Corn starch loose-fill structural changes physical properties |
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