硅酸盐学报2005，Vol.33Issue(11)：1385-1389,5.
偏高岭石-磷酸基矿物键合材料的制备与结构特征
SYNTHESIS AND STRUCTURE CHARACTERIZATION OF GEOPOLYMERIC MATERIAL BASED ON METAKAOLINITE AND PHOSPHORIC ACID
曹德光 1苏达根 2路波 2杨云霞1
作者信息
- 1. 广西大学化学化工学院,南宁,530004
- 2. 华南理工大学材料学院,广州,510641
- 折叠
摘要
Abstract
A geopolymer material based on dehydrolyed aluminosilicate and phosphoric acid was synthesized from metakaolinite condensed with low-polymeric [PO4]n3n- tetrahedral units in phosphoric acid aqueous solution at room temperature. The product of the geopolymerization has a polymeric Si-O-Al-O-P three-dimensional structure. The material structure and geopolymerization mechanism of the products were investigated using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and 29 Si and 27 Al magic angle spinning nuclear magnetic resonance (NMR). The results show that there are three chemical environments for Al3+ in the geopolymer. The NMR chemical shift of 29 Si in the product is presented only at- 110,which demonstrates that the linking among[SiO4]tetrahedral units keeps the layer structure in the geopolymers. In the infrared spectrum of the geopolymer, the resonance absorbance peak of 800 cm-1 of the Al-O layer of metakaolinite disappeared. The XRD pattern of the obtained polymers is essentially amorphous. A model of the geopolymerization mechanism was proposed to explain the experimental results.关键词
键合反应机理/偏高岭石/磷酸/制备/结构Key words
geopolymerization mechanism/metakaolinite/phosphoric acid/synthesis/structure分类
化学化工引用本文复制引用
曹德光,苏达根,路波,杨云霞..偏高岭石-磷酸基矿物键合材料的制备与结构特征[J].硅酸盐学报,2005,33(11):1385-1389,5.
