Application of tissue engineering to inorganic material processing and creation of panoscopic functional materials

本研究项目尝试将组织工程中的靶材生长技术应用于无机材料的加工。利用该技术研究了在所有长度尺度上具有受控结构的全景材料的制备。在水处理过程中，通过有机骨架自发控制宏观形貌、介观排列和微观晶相和形状。该项目的成果分为三个阶段。(1)研究了二氧化钛、氧化锌等功能氧化物在水溶液有机骨架上低温生长的制备条件，包括pH值、浓度和温度。控制可溶物种的化学势对于直接制备晶相是至关重要的。(2)考察了共存物种对晶体形态的影响。特定阴离子的存在导致了生长单元的小型化和独特的结构，如纳米片状、自相似结构和螺旋形式。(3)有机纤维、聚丙烯酰胺水凝胶和表面活性剂泡沫可作为无机材料沉积的骨架。结合(1)、(2)和(3)的结果，制备了由受控的宏观形态、亚基的介观排列和微观晶相和形状组成的全景材料。

In this research project, the growth technique of target materials on previously prepared frameworks in tissue engineering was tried to apply to inorganic material processing. Preparation of panoscopic materials having controlled structures in all length scales were investigated using the technique. Macroscopic morphology, mesoscopic arrangement and microscopic crystal phase and shapes were spontaneously controlled with organic framework in the aqueous processing. The results of this project were classified into three phases. (1) Preparation conditions including pH, concentrations and temperature were found for crystal growth of functional oxides, such as titanium dioxide and zinc oxide, on organic frameworks in aqueous solutions at low temperature. Control of the chemical potential of the soluble species was essential for the direct preparation of crystalline phases. (2) Influence of co-existing species on the morphology of crystals was investigated. The presence of specific anions induced miniaturization of growth units and unique architectures, such as nanosheets, self-similar structures and helical forms were produced. (3) Organic fibers, hydrogel of polyacrylamide and surfactant foams were found to be useful as a framework for deposition of inorganic materials. The combination of the results of (1), (2) and (3) led the preparation of panoscopic materials consisting of controlled macroscopic morphology, mesoscopic arrangement of subunits and microscopic crystalline phase and shapes..