介孔SiO2超级隔热基体材料的结构调控、钛掺杂行为及作用机理研究

项目名称： 介孔SiO2超级隔热基体材料的结构调控、钛掺杂行为及作用机理研究

项目编号： No.51504133

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 矿业工程

项目作者： 韩露

作者单位： 辽宁科技大学

项目金额： 22万元

中文摘要： 纳米多孔材料是理想的超级隔热基体材料，以优化隔热性能、提升高温热稳定性为目标，本项目提出以孔壁掺杂型介孔材料为超级隔热基材并开展相关研究。通过控制合成参数，调控孔形、调节孔径，明确主要因素对形成介观结构的影响行为。通过求解、耦合不同结构下的传热分量，建立结构与传热的关系，明确不同温度下最优化的结构数据，实现设计介观结构的目的。通过研究Si、Ti物种的水解行为，借助对Ti掺杂孔壁内的热力学和动力学研究，建立掺杂型介孔SiO2结构设计和配方设计的理论体系，实现介观结构、孔壁特性的同步可控化。通过研究不同温度，掺杂前后孔壁内各原子化学环境的变化，建立孔壁特性与热稳定性间的联系，揭示掺杂Ti对热稳定性增强机理。本研究既是利用介孔SiO2合成可控的特征制备超级隔热性和热稳定性兼顾的介观隔热基材所涉及的学术问题，又是一种新型保温材料研究方面的基础问题，为合成新型介孔隔热材料提供数据支撑、奠定理论基础。

中文关键词： 隔热材料；二氧化硅；介观结构；钛掺杂；热稳定性

英文摘要： Nanoporous material is the ideal super thermal insulating matrix material. It is proposed to use the doping channel wall ordered mesoporous SiO2 as super thermal insulating matrix material taking aim at the optimization both thermal insulating performance and thermal stability. The influences of the synthesis parameters on the regulation characteristics of mesostructures are studied first. By the calculation and numerical coupling of heat transfer component under different structure, the relationship between mesostructures and heat transfer will be structured, and then the ideal mesostructure will be obtained. The purpose of designing mesostructure will be realized. Taking the controlling the hydrolytic behaviors of silicon species and titanium species, in the help of the study on thermodynamics and kinetics in titanium-doping channel wall, the theoretical system of structure design and formulation design will be established for synchronous control of mesostructure and channel wall. Through the study on the change of atomic chemical environment in channel wall under different condition, the relationship between channel wall and thermal stability will be established for the revelation of titanium doping behavior enhancement mechanism. This proposal is not only an academic subject on mesoporous SiO2 super thermal insulating matrix material with both thermal insulating performance and thermal stability by employing its synthetic controllability, but also a basic issue to study on a new-type thermal insulating materials. The implementation of this proposal will provide a reliable test data supporting and lay a theoretical foundation for synthesis a new mesostructure thermal insulating material.

英文关键词： thermal insulating material;silicon dioxide;mesostructure;titanium doping ;thermal stability