Surficial N+ charge density indicating antibacterial capacity of quaternary ammonium resins in water environment.

ABSTRACT: The antibacterial effects of quaternary ammonium resins (QARs) have been reported for decades, but there are few practical applications because of limited improvements in bactericidal capacity and the absence of an efficient antibacterial-indicating parameter. An in-situ determination method of surficial N+ groups for QARs, defined as surficial N+ charge density, was first established to merely quantify the exposed surficial quaternary ammonium groups (QAs). The mechanism of the new method depends on the tetraphenylboron sodium standard solution (TS), which is a colloidal solution with high steric hindrance, making it difficult to permeate into QARs and further react with the inner QAs. The results showed that the antibacterial efficacy of QARs correlates with the surficial N+ charge densi

SUBMITTER: Zhang H 

PROVIDER: S-EPMC7526928 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature