Fabrication of novel anisotropic materials from cellulose and their structural analyses and functional developments

本研究旨在从纤维素中制备新型各向异性材料，并建立一种通过X射线/中子衍射和固态NMR光谱分析其晶体结构的方法。利用调频旋转磁场实现了低分子量模型有机化合物微晶的三维取向。结果表明，即使从微晶状态，也可以通过13 C和31 P化学位移张量的评估来分析晶体结构。通过对纤维素纳米晶体施加磁场来进行纤维素的取向，所述纤维素纳米晶体是通过机械均质化然后酸水解原始纤维素材料而获得的。

This research aimed at a fabrication of novel anisotropic materials from cellulose and an establishment of a method to analyze their crystal structures by X-ray/neutron diffraction and solid-state NMR spectroscopy. The three-dimensional alignment of microcrystals was achieved for model organic compounds of low-molecular weight by using a frequency-modulated rotating magnetic field. It was demonstrated that the crystal structures can be analyzed through the evaluation of 13C and 31P chemical shift tensors even from microcrystalline state. The orientation of cellulose was performed by application of a magnetic field for cellulose nanocrystals which were obtained through mechanical homogenization followed by acid hydrolysis of original cellulose materials.