稀土对铝硅的活化和键合作用机理及其在地聚合物中的应用

项目名称： 稀土对铝硅的活化和键合作用机理及其在地聚合物中的应用

项目编号： No.51264009

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 匡敬忠

作者单位： 江西理工大学

项目金额： 48万元

中文摘要： 稀土是具有高氧化能和高电荷的大离子，能与其它键结合，很容易获得和失去电子，能降低反应活化能和促进反应进行。本项目以富含铝硅的高岭石为原料，钠（钾）水玻璃和氢氧化钠（钾）为激活剂，通过在高岭石活化过程和在地聚合物合成过程中添加稀土等技术完成以下研究： 1）研究稀土对高岭石转变为偏高岭石结构重排过程和分解动力学的影响，查明稀土对热变高岭石结构渐变和突变的内在作用规律；2）研究稀土对偏高岭石中铝氧层化学键合反应能力敏感结构单元的作用规律，揭示铝配位结构与碱溶特性之间的作用关系，探明稀土活化高岭石的活化机理；3）研究在稀土作用下，铝硅组分在碱中的溶解络合、分散迁移、浓缩聚合和脱水硬化过程，查明Si 、Al之间的键合和微观连接状态，探明稀土对铝硅键合过程的催化作用和键合动力学作用机理。 本项目将丰富和补充稀土化学理论和材料微观结构设计理论，为稀土应用提供理论指导，为地聚合物的微观结构设计提供新思路。

中文关键词： 稀土；高岭石；活化能；聚合反应；地聚合物

英文摘要： Rare Earth ions has high oxidation enengy and highly charge which can gain and lose electrons easily when combined with other bonds accompanied with the characteristics of reducing the activation energy and promoting the reaction. In this project, the kaolinite-rich Al-Si is used for raw material, and sodium (potassium) silicate and sodium hydroxide (potassium) for activator, which aims at improving the performance of geopolymers through the addition of rare earth in the process of activation of kaolinite and geopolymer synthesis. By doing so, three researches are to going to be achieved: 1) Identifying the intrinsic law of the rare earth effects on the gradual and abrupt change of the kaolinite structure if being heated, with reference to studies of kaolinite transformation to metakaolinite, structure rearrangement process and the decomposition kinetics when rare earth is being added; 2) Disclosing the relationship between the aluminum coordination structure and alkali-soluble characteristics and discovering the activation mechanism of kaolinite with rare earth mixed if being heated, based on the law of rare earth effects on responding index of geopolymerzation of the sensitive structural units in the metakaolinite aluminum oxide layer; 3) Analyzing geopolymerzation and Si and Al micro-combination process, a

英文关键词： rare earth；kaolinite；activation energy；geopolymerzation；geopolymer