Preparation of cetylpyridinium montmorillonite for antibacterial applications
Source abstract
Abstract
Abstract The antibacterial activities of cetylpyridinium-montmorillonites (CP + -Mt) were tested on Staphylococcus aureus and Pseudomonas aeruginosa . The Mt were prepared by using the five different CP + amounts of 0.5, 0.7, 1.0, 1.5, and 2.0 times of cation exchange capacities (CEC) of Na + -Mt. Desorption of CP + from the surface was also determined by successive adsorption–desorption experiments. The antibacterial activity tests were conducted by using Na + -Mt and CP + -Mt through the disk diffusion (Kirby–Bauer) method against the P. aeruginosa ATCC 27853, and S. aureus ATCC 29213 strains. XRD analyses of the CP + -Mt showed that basal spacing regularly increased by increasing the amount of CP + cations. Adsorption/desorption studies revealed that desorption occurred only in 2.0 CEC CP + -Mt by dilution with water and in 1.0 CEC CP + -Mt at a pH of 2.0. Na + -Mt exhibited no antibacterial activity against both bacteria. All of the CP + -Mt samples prepared were active against S. aureus , whereas they had no antibacterial activity against P. aeruginosa . Minimum inhibitory concentration (MIC) was found to be 1 mg/plate against S. aureus , determined with 0.5 CEC CP + -Mt. Because nearly no desorption of CP + was observed, the antibacterial activity was attributed to the CP + bound to the Mt surface.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Clay minerals and soil interactions · Concrete and Cement Materials Research · Nanoparticles: synthesis and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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