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首页> 外文期刊>Journal of Applied Polymer Science >Evaluation of hydrophilic cellulose nanofiber dispersions in a hydrophobic isotactic polypropylene composite
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Evaluation of hydrophilic cellulose nanofiber dispersions in a hydrophobic isotactic polypropylene composite

机译：疏水性同时聚丙烯复合材料中亲水性纤维素纳米纤维分散体的评价

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摘要

An effective approach for the evaluation of dispersed hydrophilic cellulose nanofibers (CNFs) in hydrophobic isotactic polypropylene (iPP) is presented using scattering and microscopic techniques for fiber analysis on nanometer and micrometer scales. iPP composites reinforced with CNF fibrous fillers were characterized by small-angle light scattering, small-angle X-ray scattering, and polarized optical microscopy measurements in the molten state in order to evaluate the shape of CNF fillers and/or larger aggregates formed from these fibers. The best dispersion results in the molten state coincided with low concentrations of CNFs. We observed the effect of CNFs on the acceleration of iPP crystal growth using wide-angle X-ray scattering and differential scanning calorimeter measurements. It was even possible to observe the nucleation morphology around CNF fibrous fillers using transmission electron microscopy.
机译：利用散射和显微镜技术在纳米和微米尺度上对纤维进行分析，提出了一种评价疏水性等规聚丙烯（iPP）中分散的亲水性纤维素纳米纤维（CNF）的有效方法。通过熔融状态下的小角光散射、小角X射线散射和偏光显微镜测量，对CNF纤维填料增强的iPP复合材料进行了表征，以评估CNF填料和/或由这些纤维形成的较大骨料的形状。熔融状态下的最佳分散结果与低浓度CNF一致。我们通过广角X射线散射和差示扫描量热仪测量，观察了CNFs对iPP晶体生长加速的影响。甚至可以用透射电子显微镜观察CNF纤维填料周围的成核形态。

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