Nanostructure control and functioning expression of sugar derivatives / clay composite materials

将甲基α- d -葡萄糖苷或羟丙基蔗糖溶解在环酯（ε-己内酯、l-丙交酯）中，其中预先存在2 ~ 5wt%的有机改性粘土，制备了纳米复合多元醇。利用它们制备了聚氨酯泡沫塑料，并对其密度、压缩特性、DMA（压缩模式）特性等进行了表征。粘土的纳米分散导致其固体性能尤其是低温特性的改善，同时也导致其抗风化性能的恶化。例如，粘土的纳米分散提高了压缩试验的极限密度值。通过上述研究，实现了木质纤维素液化技术的创新改进。对于所获得的液化产物，研究了与粘土形成的纳米复合材料及其功能性能。x射线衍射研究证实了某些粘土在混合物中的纳米分散，以及它们在液体粘度中的增加。通过对制备的聚氨酯泡沫的DMA测试，观察到其物理性能的提高，特别是刚性模量和热阻。通过扫描电镜观察，纳米粘土的加入使泡沫的孔结构更加均匀。对于某些粘土，将它们简单地加入到液化的木质纤维素产品中就足以使它们完全分离，从而实现纳米复合材料的形成。其中一种未经改性的粘土——合成硅钙镁石，被发现属于其中的一个例子。DSC测量结果表明，粘土的加入加速了苯酚液化生物质的三维固化，其加速固化的程度取决于粘土的纳米分散程度。研究发现，纳米粘土的加入可以改善产物的质量，并且根据处理条件的不同，纳米分散粘土可以作为产物变质反应的催化剂。少

Nanocomposite type polyols have been prepared from metyl-α-D-glucoside or hydroxypropyl sucrose dissolved within cyclic esters (ε-caprolactone, L-lactide) in which organically modified clays of 2〜5wt% amounts were pre-existed. By using them polyurethane foams have been made and characterized their densities, compression characteristics, DMA (compression mode) characteristics and all the rest. Nano-dispersion of clays resulted in upgrading of solid state properties, especially characteristics at low temperatures, and at the same time, deterioration in weathering resistance. For instance, the limiting density for compression testing was increase in value by the nano-dispersion of clays. From the above investigation, innovative betterment in the liquefaction of lignocellulosics was achieved. For the liquefied products thus obtained, nano-composite formation with clays and the functional capabilities of the products have been investigated. Nano-dispersion of certain clays within the compos … More ites was confirmed by X-ray diffraction studies as well as their increase in liquid viscosities. From the DMA measurement on the prepared polyurethane foams, advancement of physical properties, especially modulus of rigidity, and thermal resistance were observed. And from the SEM observation, uniformity of cell structure of the foams said to be attained by the clay nano-addition. For the certain clays, their simple addition into the liquefied lignocellulosic products was sufficient to attain their complete layer separation, realizing nanocomposite formations. Synthetic hectorite, one of the unmodified clays, was found to belong to an example of them. From DSC measurement, acceleration of three dimensional curing of phenol-liquefied biomass was found by the addition of clays and the extent of the acceleration of curing depended on the attainment degree of the clay's nano-dispersion. It was found that betterment of products was achieved by nano-addition of clays, and depending on the conditions of treatments the nano-dispersed clay acted as a catalyst for the deterioration reaction of the products. Less