Proposta de otimização de avaliação antimicrobiana em têxteis

Abstract

Textiles have long been recognized for being susceptible to attack by microorganisms. These attacks are considered inconvenient as it results in loss of resistance, odors and health problems for users. Thus, antimicrobial finishes appear as products to protect textiles from these attacks. The present work aimed to compare methods of antimicrobial evaluation, since quantitative tests can have a high number of experiments. proposing, a new approach for evaluation, aiming at cost and time reduction in this procedure. For this purpose, a mesh fabric with 100% PES composition, functionalized with a metal-organic structure, was used for the study. The tissue was evaluated quantitatively, through adaptation of the ASTM E2149-13 standard. Then, a method of indirect, visual and faster reading, was developed by elaborating a bacterial growth curve by spectrophotometric evaluation in order to determine a standard growth curve for E. coli ATCC® 25922TM bacteria and an equation that relates color (due to the use of the indicator dye Resazurina) with the concentration of CFU mL-1 from an experiment with textiles with potential antimicrobials and compare with the quantitative methodology. As a result of the present work, it was possible to propose an intermediate method for quantitative tests that selects samples that prove viable, in a visual way and simplified by the method, reducing the time and cost of quantitative antimicrobial analysis.