Comportamento térmico da caulinita hidratada
AUTOR(ES)
Gardolinski, José Eduardo, Martins Filho, Harley Paiva, Wypych, Fernando
FONTE
Química Nova
DATA DE PUBLICAÇÃO
2003-01
RESUMO
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.
Documentos Relacionados
- Comportamento Térmico da Fibra do Açaí.
- Comportamento térmico da decomposição de alguns complexos metálicos de poliditiooxamidas
- Comportamento térmico do EPDM/Ferro carbonila
- Estudo do comportamento térmico e propriedades físico-mecânicas da lama vermelha
- Estudo dos tratamentos químico e térmico na caulinita e a influência na remoção de contaminantes em efluentes de mineração