Study of improved silica with carbon from recycled batteries for use in antimicrobial fabrics

IGAL, KATERINE; ARRECHE, ROMINA A.; BELLOTTI, NATALIA; JORGE E, SAMBETH; PATRICIA G, VÁZQUEZ

Sao Pablo

Congreso; 46th World Chemistry Congress, 40a Reunião Anual da Sociedade Brasileira de Química and IUPAC 49th General Assembly; 2017

IUPAC

Microorganisms under appropriate conditions attach and grow on materials developing biofilms and carrying out the corresponding bio-deterioration. Fabric microbial bio-deterioration is considered hazardous to human health, especially in healthcare centers where acquired infections are one of the leading causes of death. The increase in volume of urban waste, the simultaneous decline in available spaces and all the problems associated with pollution involved, are considered great importance issues. Therefore, it is very important that waste materials can be reused, for example, reuse the materials contained in batteries as carbon mixed with other oxides1. The purpose of this research was to obtain siliceous matrix doped with carbon (C) from waste batteries, functionalized with 3-aminopropyltriethoxysilane (APS), and impregnated with silver nitrate to evaluate their antimicrobial activity. The microorganisms used: Aspergillus sp., Cladosporium sp. and Chaetomium globosum were selected based on their cellulolytic ability determined in agar plate analyzes. Siliceous matrices were synthesized by the sol-gel method using tetraethyl orthosilicate (TEOS), as precursor and glacial acetic acid (KHA) or ammonium hydroxide (KB) as catalyst, adding C, in different concentrations: 0.1 (K1), 1 (K2) and 10 (K3) %(w/w) C. These supports were functionalized with APS (KB(HA)f) in relation to 1:1 and, subsequently, these were impregnated by incipient wetness technique with silver nitrate, resulting in 1 and 2 (2Ag) %(w/w) Ag in the dry solids2. These solids were characterized by different techniques: XRD, FT-IR, SBET, potentiometric titration, SEM-EDX and TEM (Figure 1).