摘要
使用 8M氢氧化钠溶液和模数为 3.2的硅酸钠水玻璃的混合溶液为激发剂 ,选用两种不同活性的高岭土在室温、4MPa的压力条件下制备了矿物聚合物材料。通过XRD、IR和SEM等手段研究了矿物聚合反应的机理 ,考察了高岭土的活性对矿物聚合反应的影响 ,观察了基于高岭土的矿物聚合物材料的形貌。结果表明 ,较高活性的高岭土在激发剂作用下发生了较完全的矿物聚合反应 ,其产物可以用XRD得到明显的鉴别 ,而低活性高岭土与激发剂的作用产物XRD上没有明显的特征识别 ;两种活性高岭土基的矿物聚合反应产物均为层状结构 ,基于高活性高岭土的矿物聚合反应产物的层的连续性和致密性比基于低活性高岭土的好。
Kaolinite-based geopolymer was successfully synthesized using compound activator composed of sodium silicate solution and sodium hydroxide solution at room temperature and the pressure of about 4Mpa. Mechanism of geosynthesis was studied by XRD、IR. Shape of geopolymer was observed using SEM. The effect of activation of kaolinite on geosynthesis was investigated. The result shows that geosynthesis was occurred when the two kinds of kaolinite were activated by the compound activator. Geopolymer material derived from kaolinite with high degree activation can be easily identified by XRD pattern, while that low degree activation kaolinite-based has not considerable information on the XRD pattern. SEM images indicate the geopolymer based on the two kinds of kaolinite is layer structure. Geopolymer material produced from kaolinite with high degree activation has better continuity of layer structure and more compact than that of kaolinite with low degree activation.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2004年第4期580-583,共4页
Journal of Materials Science and Engineering
关键词
高岭土
矿物聚合反应
矿物聚合物
激发剂
kaolinite
activation
geopolymer
geosynthesis
inorganic polymer
