Chitosan is a natural biopolymer with antibacterial properties and the solution of chitosan is prepared in acetic acid. So, has acetic acid any effect in contributing towards the antibacterial behavior of chitosan?
Based on the following link it was observed that chitosan water-acetic acid systems show the highest antimicrobial activity due to the highest chitosan charge density, compared to the mixtures with lactic and citric acid.
Article Chitosan Films in Food Applications. Tuning Film Properties ...