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BIOMIMETIC POLYSACCHARIDE NANOCOMPOSITES OF HIGHCELLULOSE CONTENT

机译:高纤维素含量的仿生多糖纳米复合材料

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Plant cell walls combine mechanical stiffness, strength and toughness despite a highly hydrated state. Inspired by this, a nanostructured cellulose network is combined with a viscous, polysaccharide matrix in the farm of a 50-50 amylopectin-glycerol blend. Homogeneous films with a microfibrillated cellulose (MFC) nanofiber content in the range 10-70wt% are successfully cast. Characterization is carried out by DMA, FE-SEM. The MFC is well dispersed and predominantly oriented random-in-the-plane. High tensile strength is combined with high modulus and high work of fracture in the nano-composite with 70wt% MFC. The reasons for this interesting combination of properties include nanofiber and matrix properties, favorable nanofiber-matrix interaction and good dispersion, and the ability of the MFC network to maintain its integrity to a strain of at least 8%.
机译:植物壁壁结合了机械刚度,强度和韧性尽管高度水合状态。受到此处的启发,纳米结构纤维素网络与50-50个淀粉蛋白 - 甘油混合物的农场中的粘性多糖基质组合。具有10-70wt%范围内的微纤化纤维素(MFC)纳米纤维含量的均相薄膜成功铸造。表征由DMA,FE-SEM进行。 MFC良好地分散,主要取向随机型在一起。高抗拉强度与纳米复合材料中的高模量和高效相结合,具有70wt%MFC。这种有趣的性能组合的原因包括纳米纤维和基质特性,良好的纳米纤维 - 基质相互作用和良好的分散,以及MFC网络将其完整性保持至少8%的应变的能力。

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