矿物聚合材料具有良好的性能,可用来代替部分硅酸盐水泥制品.利用变高岭石制备得矿物聚合材料制品,根据核磁共振测试分析,研究了该材料固化过程中硅、铝2种元素的存在状态.结果表明,变高岭石原料中的Si以Q4(0Al)为主;随固化时间的延长,Q4(0Al)的含量逐渐减少,而Q2(1Al)和Q4(2Al)开始出现,且其含量逐渐增加,然后Q2(1Al)和Q4(2Al)含量相对降低,Q4(0Al)含量增加;变高岭石原料中的Al有四次配位也有六次配位,且六次配位的峰比四次配位的峰高而尖锐,随着反应的进行,四次配位的峰逐渐变高;固化28天制品中的Si主要以Q4(2Al)形式存在,Al则以四次配位为主.实验结果为进一步揭示矿物聚合材料的形成机理、改善制品的性能奠定了良好基础.
Mineral polymer with good properties can be equivalents of the portland cement products. The existence state of Si and Al element is deduced from the analytical data of MAS-NMR of mineral polymer products cured for 3 days,7 days, 14 days,and 28 days respetively. The results show Q4 (0Al) is the main form of Si in the raw of metakaolinite. The content of Q4 (0Al) decrease,and the peak of Q2 (1Al) and Q4 (2Al) increase during the solidification of mineral polymer. Octahedral aluminum is the main form of Al elment in the metakaolinite,but the content of tetrahedral aluminum increase during the polymerization. Q4 (2Al) is the principal form of Si element and tetrahedral aluminum is the main form Al element in the mineral polymer products cured for 28 days. The experimental results provide a good basis for understanding the reactive mechanism of polymerization during the processing of mineral polymer products.
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