engleski

The influence of cationic surfactant desorption to cotton antimicrobial properties

In this paper the adsorption and desorption of cationic surfactants on standard cotton fabric was researched, as well its influence to fabric antimicrobial properties. Four different QACs: Hexadecyltrimethyl ammonium chloride (HDTMAC), Hexadecyltrimethyl ammonium bromide (HDTMAB), N- cetylpyridinium chloride (N-CPC) and Cetylpyridinium bromide (CPB), have been used. The adsorbed QAC amount, as well as desorbed amount, were determined indirectly by potentiometric titration using ion-selective electrode. The antimicrobial activity was determined according to AATCC TM147-2016 to Staphylococcus aureus, Escherichia coli, and Candida albicans. It has been shown that QAC adsorption is different for different hydrophilic ammonium and pyridinum groups in a surfactant molecule. Ammonium group leads to higher adsorption, whilst pyridinium have better bonding. The antimicrobial results show similar behavior – pyridinium group QACs show better antimicrobial activity.

cotton, cationic surfactants, desorption, antimicrobial properties

Lodz University of Technology