Modification of a Brazilian smectite clay with different quaternary ammonium salts

Química Nova

Delbem, Maria Flávia¹  Valenzuela-Diaz, Francisco R.¹  Valera, Ticiane S.¹  Universidade de São Paulo, São Paulo, Brasil¹  Demarquette, Nicole R.¹ 

关键词: alkyl quaternary ammonium salts;    thermal stability;    Brazilian smectite clay.;   

DOI  :  10.1590/S0100-40422010000200015

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

In this work, a smectite clay from the State of Paraiba, Brazil, was treated with six different types of ammonium salts, which is an usual method to enhance the affinity between the clay and polymer for the preparation of nanocomposites. The clays, before and after modification, were characterized by X ray diffraction. The conformation of the salts within the platelets of the clay depended on the number of long alkyl chains of the salt. The thermal stability of the clays was also studied. The ammonium salts thermal decomposition was explained in light of their position within the organoclays.

【 授权许可】

Unknown