Enhanced activity of commercial biocides by encapsulation in mesoporous silicas

L. E. MARDONES; M S. LEGNOVERDE; N. BELLOTTI; E. I. BASALDELLA

Santa Fe

Conferencia; VI San Luis School and Conference on Surfaces, Interfaces and Catalysis; 2018

Ministerio de Ciencia Tecnología e innovación Productiva

The use of two types of nanostructured materials as new hosts for stabilizing isothiazolinone-based biocides was investigated. SBA-15 mesoporous silica was prepared according to the methodology described by Zhao1, and mesocellularsiliceous foam (MCF) was obtained employing a procedure described by Schmidt-Winkel2. The physicochemical properties of the silicas (structure, textural properties) were evaluated in order to determine their ability to encapsulate, stabilize and subsequently release a commercial biocide used for latex preservation3 (CMIT/MIT). CMIT/MIT consists of an aqueous solution of the active ingredients CMIT (5-chloro-2-methyl-4-isothiazolin-3-one) and MIT (2-methyl-4-isothiazolin-3-one), present in a CMIT/MIT: 3/1 weight ratio4.