Abstract

LAREZ VELASQUEZ, Cristóbal et al. La densidad de carga de polielectrolitos y su capacidad de neutralización en sistemas coloidales. Rev. LatinAm. Met. Mat. [online]. 2003, vol.23, n.1, pp.16-20. ISSN 0255-6952.

Abstracts     Chitosan, N,N,N - trimethylchitosan (TMC) and poly (acryloxy - ethyl - trimetheylammoniun chloride) (Q9) have been evaluated as flocculant agents in aqueous caolin suspensions. A comparative study of these flocculant aggents in un-stabilized kaolin susspension is reported. A strong disturbance of the system was observed when chitosan was employed due to the excess of acid normally employed to solubilize it. The TMC showed an excellent flocculation capacity comparable to commercial polymer Q9, even though TMc charge density is smaller. On the other hand, agood correlation between charge density and the ammount required to induce in the systema zero charge was obtained.

Keywords : Trimethylchitosan; flocculation; polyelectrites.