Assessment of silica-based solid modified with recycled battery products to be applied in antimicrobial fabrics

R. ARRECHE; P. VÁZQUEZ; K. IGAL; N. BELLOTTI; J.E. SAMBETH

San José

Workshop; 7th Workshop on Green Chemistry and Nanotechnologies in Polymer Chemistry. National Laboratory of Nanotechnology; 2016

Universidad Nacional de Costa Rica

The purpose of this research was to obtain siliceous matrix doped with carbon from waste batteries, functionalized with 3-aminopropyltriethoxysilane (APS), and impregnated with silver nitrate to assess their antimicrobial activity. The microorganisms used in this study, Aspergillus sp., Cladosporium sp. and Chaetomium globosum were selected based on their cellulolytic ability determined in agar plate assays. Both Aspergillus sp. and Cladosporium sp. were previously isolated from biodeteriorated fabrics by conventional microbiological techniques while C. globosum belong to the CIDEPINT culture collection. Siliceous matrices were synthesized by the sol-gel method under N2 atmosphere using tetraethyl orthosilicate (TEOS - Si(OCH3)4), as precursor and glacial acetic acid as catalyst, adding carbon (C), in different concentrations (0.1, 1 and 10% (w/w) of C. These supports were functionalized with APS in relation to 1:1 and, subsequently, these were impregnated by incipient wetness technique with silver nitrate, resulting in 1 and 2% (w/w) of Ag in the dry solids3. These solids were characterized by techniques as SEM-EDX, TEM, XRD, FT-IR, SBET and potentiometric titration.