Abstract
We examined coadsorption from mixtures of the anionic surfactant sodium dodecyl sulfate (SDS) with either hydroxypropyl cellulose (HPC) or hydrophobically modified hydroxyethyl cellulose (hmHEC). Coadsorption to nonselective, hydrophobic poly(dimethylsiloxane) (PDMS) surfaces was compared with coadsorption to negatively charged silica surfaces that were selective for the polymers. Optical reflectometry provided the total extent of adsorption as well as the adsorption kinetics. We referenced SDS concentrations against the critical association concentration (cac) and saturation concentration (csat) for solution-phase polymer/surfactant binding as determined by pyrene solubilization and fluorescence spectroscopy methods. Depending on the bulk SDS concentration, the total adsorbed mass could be either increased or decreased compared to the adsorbed mass attained from SDS-free polymer solutions. Above the cac, the total adsorbed amount decreased with increasing SDS concentration, for either polymer on either t...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
