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首页> 外文期刊>Journal of Wood Chemistry and Technology >MORPHOLOGICAL ANALYSES OF SOME MICRO- AND NANOFIBRILS FROM BIRCH AND WHEAT STRAW SOURCES
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MORPHOLOGICAL ANALYSES OF SOME MICRO- AND NANOFIBRILS FROM BIRCH AND WHEAT STRAW SOURCES

机译：桦树和小麦秸秆来源的一些微纤维和纳米纤维的形态学分析

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摘要

The morphological properties of nano- and microcellulose depend on the source of the particles, the preparation methods, and the processing conditions. In this study, two different kinds of microfibrillated (MFC) and nanofibrillated (NFC) celluloses were produced from wood and non-wood cellulose pulps through mechanical methods without using any chemicals. The morphological properties of the samples and feasibility of different analysis methods were investigated using a novel chromatographic washer, a field emission scanning electron microscope (FESEM), a laser diffractometer (LS), a rotational viscometer, X-ray diffractometry (WAXD) and, additionally, the degree of polymerization (DP) was assessed. The analyses showed that the formed non-wood cellulose fibrils were shorter than the wood cellulose fibrils, but wheat straw pulp comminuted to nanofibrils more easily. The low hemicelluloses content of wheat straw pulp caused the flocculation of the nanofibrils formed in homogenization. All of the analytical methods reflect morphological differences between the micro-and nanocellulose materials.
机译：纳米纤维素和微纤维素的形态学性质取决于颗粒的来源，制备方法和加工条件。在这项研究中，通过机械方法从木材和非木材纤维素纸浆中制得了两种不同类型的微纤化（MFC）和纳米纤化（NFC）纤维素，而无需使用任何化学药品。使用新型色谱清洗机，场发射扫描电子显微镜（FESEM），激光衍射仪（LS），旋转粘度计，X射线衍射仪（WAXD）对样品的形态学性质和不同分析方法的可行性进行了研究，另外，评估了聚合度（DP）。分析表明，形成的非木质纤维素原纤维比木质纤维素原纤维短，但是麦草浆更容易粉碎成纳米原纤维。小麦草浆中低半纤维素含量导致在均质化过程中形成的纳米原纤维絮凝。所有的分析方法都反映了微纤维素和纳米纤维素材料之间的形态差异。

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