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首页> 外文期刊>Journal of Polymers and the Environment >Biological Macromolecule Composite Films Made from Sagu Starch and Flour/Poly(ε-Caprolactone) Blends Processed by Blending/Thermo Molding
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Biological Macromolecule Composite Films Made from Sagu Starch and Flour/Poly(ε-Caprolactone) Blends Processed by Blending/Thermo Molding

机译：萨古淀粉与面粉/聚（ε-己内酯）共混物/热成型加工制成的生物高分子复合膜

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摘要

Non-conventional starch sources (starch and flour) obtained from sagu (Canna edulis Kerr) rhizomes grown in the Venezuelan Amazon were used as biological macromolecule matrices. Biological macromolecule composite films prepared from sagu starch and flour/poly(epsilon-caprolactone) (PCL) blends were then obtained by blending/thermo molding. The use of flours as a rich source of starch has attracted much attention as they are cheaper than starch, thus making them commercially more competitive. The PCL-containing films proved to be less stable in an alkaline medium and less dense (0.60-0.66 g/cm(3)), and were also thinner (1.15-1.17 mm), rougher, more crystalline (20.5-27.1%) and opaque (1.45-1.52) than the films without added PCL. Films made from the flour/PCL blend showed a greater phase separation than the starch/PCL films. The use of flour as a starchy source is interesting. However, the results of attenuated total reflectance Fourier transform infrared spectroscopy and water activity suggest that the films prepared from sagu starch-glycerol had stronger hydrogen bonding interactions than those made from flour-glycerol. This led to the sagu starch-based film being less susceptible to moisture and more stable under alkaline conditions.
机译：从委内瑞拉亚马逊河地区的sagu（Canna edulis Kerr）根茎获得的非常规淀粉来源（淀粉和面粉）被用作生物大分子基质。然后通过共混/热成型获得由豆蔻淀粉和面粉/聚（ε-己内酯）（PCL）共混物制备的生物高分子复合膜。由于面粉比淀粉便宜，因此使用面粉作为丰富的淀粉来源已经引起了广泛的关注，从而使其在商业上更具竞争力。含PCL的薄膜在碱性介质中不稳定，密度较低（0.60-0.66 g / cm（3）），并且更薄（1.15-1.17 mm），更粗糙，更结晶（20.5-27.1％）与不添加PCL的薄膜相比，其不透明（1.45-1.52）。由面粉/ PCL共混物制成的薄膜比淀粉/ PCL薄膜显示出更大的相分离。使用面粉作为淀粉源是有趣的。然而，衰减全反射傅立叶变换红外光谱和水活度的结果表明，由萨古淀粉-甘油制成的薄膜比由面粉-甘油制成的薄膜具有更强的氢键相互作用。这导致萨古淀粉基薄膜不易受潮，在碱性条件下更稳定。

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