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BIOMIMETIC POLYSACCHARIDE NANOCOMPOSITES OF HIGHCELLULOSE CONTENT

机译:高纤维素含量的生物型多糖纳米复合材料

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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:尽管高度水合,植物细胞壁仍具有机械刚度,强度和韧性。受此启发,在50-50支链淀粉-甘油混合物的农场中,纳米结构的纤维素网络与粘性的多糖基质结合在一起。成功浇铸了微纤化纤维素(MFC)纳米纤维含量在10-70wt%范围内的均质薄膜。表征通过DMA,FE-SEM进行。 MFC分散良好,且方向随机。在具有70wt%MFC的纳米复合材料中,高拉伸强度与高模量和高断裂功相结合。这种有趣的特性组合的原因包括纳米纤维和基质的性能,良好的纳米纤维与基质的相互作用以及良好的分散性,以及MFC网络将其完整性保持在至少8%的应变的能力。

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