Química Nova | |
Thermal behavior of hydrated kaolinite | |
Universidade Federal do Paraná, Curitiba1  Martins Filho, Harley Paiva1  Wypych, Fernando1  Gardolinski, José Eduardo1  | |
关键词: kaolinite; clay minerals; intercalation compounds.; | |
DOI : 10.1590/S0100-40422003000100007 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
Well-ordered kaolinite from the Brazilian Amazon Region (State of Pará) was initially reacted at 60 °C with a water dimethylsulfoxide mixture. After washing and characterisation, the resulting material was washed several times with methanol and in the final step with water. The water molecules displace the previously dimethylsulfoxide intercalated molecules and two different hydrated kaolinites were obtained. An unstable phase characterized by an interplanar basal distance of 0,996 nm that after drying collapse to the stable 0,844 nm hydrated kaolinite. The dehydration of the sample to disordered kaolinite was accompanied by Powder X-ray Diffractometry, thermal analysis (simultaneous TG and DSC) and FTIR spectroscopy.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912050592889ZK.pdf | 487KB | download |