Microbicidal properties of polymer films modified by five-membered polynitrogen heterocycles

Abstract

The probability of a series of substituted 1,2,4-tri- and tetrazole compounds and by these modified polymer film materials to inhibit the process of microbiological corrosion of metals has been investigated. Fungi-toxicity of the studied compounds and materials has been observed for Aspergillus, Penicillium and Trichoderma fungi whose metabolites initiate corrosion of ferrous and nonferrous materials. For Thiobacillus ferrooxidans as an example, the bactericidal properties have been studied and azoles have been proven to suppress test-culture growth in culture medium. A comparative analysis of fungi and bactericidal activity of the studied compounds has been carried out. According to experimental results of kinetics of modifier desorption from the polymer matrix, the microbicidal effect of modified films is determined along with the corrosion inhibitor (CI) biocidal properties by its volatility and the intensity of the liquid phase (plasticizer + CI) syneresis from the material bulk. It has been concluded that there are fair prospects of application of azoles and by azoles modified materials as means of protection against both microbiological and electrochemical corrosion.