Artículos de revistas
Evaluation of the biocide activity of phosphorylated and sulfophosphorylated resins
Fecha
2013-08-02Registro en:
MATERIALS LETTERS, AMSTERDAM, v. 74, n. 3, supl. 1, Part 3, pp. 121-124, MAY 1, 2012
0167-577X
10.1016/j.matlet.2012.01.093
Autor
Souza, Marcelo A. V.
Santa Maria, Luiz C.
Costa, Luciana C.
Galvao, Raquel C.
Hui, Wang S.
Mercon, Fabio
Institución
Resumen
Phosphorylated poly(styrene-co-divinylbenzene) copolymers prepared by aromatic electrophilic substitution reaction with PCl3/AlCl3 were reacted with carbon dissulfite in order to introduce sulfophosphorylated groups into copolymers. These modifications were characterized by FTIR, elemental analysis, spectrophotometry, optical and scanning electron microscopy. The antibacterial activities of the phosphorylated and sulfophorylated copolymers were assessed against Escherichia coli ATCC25922 suspensions (10(3)-10(7) cells mL(-1)) using a column system. The unmodified copolymers did not have antibacterial activity against the E. coil suspensions but the phosphorylated and sulfophorylated copolymers showed significant bactericidal action for all E. coli concentrations. The sulfophosphorylated copolymers had higher antibacterial activity than the phosphorylated ones, mainly for high concentrations of E. coli cells. Published by Elsevier B.V.