A comparative study on the impact of the carbon nanotubes-modified polydimethylsiloxane nanocomposites on the colonization dynamics of the pioneer biofilm communities

摘要

In the current study, the AF properties of carbon nanotubes (CNTs)-modified polydimethylsiloxane (PDMS) nanocomposites were examined via the field assays. The impact of the CNTs incorporated in PDMS on the biological colonization and successional dynamics of the pioneer natural biofilm communities was investigated using the single-stranded conformation polymorphism (SSCP) technique. Coating characterizations, including water contact angle (WCA) measurement, scanning electron microscope (SEM) and atomic force microscopy (AFM) analysis were conducted in order to characterize the surface properties changes triggered by the incorporation of the CNT fillers. The results revealed that the incorporation of low amount of the CNT nano particles (0.1% wt) as fillers in the PDMS would greatly improve its AF properties under static submergence. The CNTs incorporated in the PDMS could exert significant impact on the diversity level, distribution patterns and the successional dynamics of the pioneer prokaryotic and eukaryotic microbial communities, particularly on the early eukaryotic microbial communities. Coating characterizations revealed the remarkable changes in the wettability and surface nanostructures of the PDMS resin would contribute considerably to the enhanced modulating and perturbation effects on the initial colonization of the pioneer microorganisms in the natural biofilms.