Development of hydrophobic cellulose film and high functional inorganic composite materials by using the bacterial cellulose

利用细菌纤维素这一超细纤维，将纤维素与无机化合物复合，开发疏水纤维素膜及高性能材料是本研究的目的。首先，对细菌纤维素进行硫酸水解和球磨机处理，制备纳米纤维。纤维素晶体中（200）面和（11-0）面晶粒尺寸在80% 50%硫酸中水解处理后几乎没有减小。而（110）平面的晶粒尺寸减小了约20%。它是思想。这是因为与（110）晶格间距形成的氢键有关。结果表明，通过对硫酸的水解处理，得到了约5nm的纤维素晶体。另一方面，在球磨机处理中，它。据了解，在粉碎纤维素时，玛瑙容器被球剃掉的一分粉末被污染。因此，澄清了这种方法不是一种适当的治疗方法。其次，探讨了作为染料敏化太阳能电池电极材料达到实用化阶段的可能性。将氧化钛粉末分布在细菌纤维素培养液中，制备氧化钛/细菌纤维素复合膜。但据了解，纤维素被氧化钛的光催化作用分解，复合膜的强度明显下降。因此，它正在审查这方面的改进。最后，通过盐酸的水解处理，制备了细菌纤维素和纸浆纤维素的纳米纤维。将这些纳米纤维溶解在8%的NaOH溶液中，并将该溶液浇铸在各种有机溶剂中，以考察疏水纤维素膜的可能性。然而，它并没有取得显著的效果。

It is a purpose of this research to develop the hydrophobic cellulose film and the high functional materials by the compound of the cellulose and the inorganic compound, by using the bacterial cellulose that is the super-minute fiber. First, to prepare the nanofiber of the bacteria cellulose, the hydrolysis by sulfuric acid and a ball mill treatment were examined. These the crystal sizes of (200) and (11-0) planes in cellulose crystal hardly decreases on the hydrolysis treatment in 50% sulfuric acid at 80℃. However, the crystal size of (110) plane decreases in about 20%. It is thought. that this is because of relating with the hydrogen bond formed in the (110) lattice spacing. As a result, it was clarified to obtain the cellulose crystal of about 5 nm by this hydrolysis treatment of the sulfuric acid. On the other hand, in the ball mill treatment, it. has been understood that a minute powder of the agate container shaved by ball contaminates in the crushing cellulose. Therefore, it was clarified that this method was not a proper treatment.Next, the possibility as electrode material of Dye-sensitized Solar Cells that reached the stage of practical use was examined. The titanium oxide powder was distributed in the culture solution of bacteria cellulose, and the titanium oxide/bacteria cellulose compound film was prepared. However, it is understood that the cellulose is resolved by the photocatalystic action of titanium oxide, and the strength of compound film decreases remarkably. As a result, it is examining the improvement of this respect.Finally, by the hydrolysis treatment of the hydrochloric acid, the nanofiber of the bacterial cellulose and the pulp cellulose was prepared. These nanofibers were dissolved in 8% NaOH solution, and this solution was cast in the various organic solvent to examine the possibility of the hydrophobic cellulose film. However, it was not able to obtain a remarkable result.