细菌纤维素中羟基在仿生矿化中的作用  

The Role of Hydroxyl Group of Bacterial Cellulose in Biomimetic Mineralization

作　　者：曾威[1] 蔡志星 梁安生[1] 熊健[1] 孟楠[1] 刘霞[1] 

机构地区：[1]天津科技大学材料科学与化学工程学院,天津300457

出　　处：《天津科技大学学报》2015年第2期38-42,共5页Journal of Tianjin University of Science & Technology

基　　金：国家自然科学基金资助项目(51102179);"大学生创新创业计划"资助项目(201310057056)

摘　　要：据仿生学原理,室温下以正硅酸乙酯(TEOS)为硅前驱体,以细菌纤维素(BC)及其改性产物为模板,制备了纳米二氧化硅.借助扫描电子显微(SEM)、X射线衍射(XRD)、红外吸收光谱(IR)等分析手段,研究了羟基在矿化过程中的作用.结果表明:细菌纤维素中的羟基对矿化反应起到至关重要的作用,结构单元中的3个羟基一起与硅源发生协同效应,使得硅源在模板表面进行均匀沉积,最终将模板形貌完整地复制下来.Biomimetic mineralization method was used to fabricate nano-silica utilizing tetraethyl orthosilicate（TEOS）as the precursor and bacteria cellulose and its modified products as templates at room temperature. Effects of hydroxyl group on the mineralization process were studied by means of scanning electron microscope （SEM）, X-ray diffraction （XRD）, and infrared spectroscopy （IR）. The results showed that hydroxyl groups of bacterial cellulose played a crucial role in the mineralization reaction. Synergistic effects occurred with all the three hydroxyls in the structure units of polysaccharides and silica sources, which made silica precursor uniformly deposited on the template surfaces. The template morphology was completely copied.

关 键 词：细菌纤维素 SiO2纳米管 仿生矿化 羟基 

分 类 号：TQ050.421[化学工程]