• Login
    View Item 
    •   Home
    • Proceedings
    • Prosiding Simposium Nasional Teknologi Terapan (SNTT)
    • Simposium Nasional Teknologi Terapan (SNTT) II 2014
    • View Item
    •   Home
    • Proceedings
    • Prosiding Simposium Nasional Teknologi Terapan (SNTT)
    • Simposium Nasional Teknologi Terapan (SNTT) II 2014
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Simulation of Dynamics of Adsortion Of Mixed Protein-Surfactant on A Bubble Surface

    Thumbnail
    View/Open
    KM-1 Denny Vitasari UMS.pdf (653.6Kb)
    Date
    2014-11-25
    Author
    Vitasari, Denny
    Grassia, Paul
    Martin, Peter
    Metadata
    Show full item record
    Abstract
    The dynamics of adsorption of mixed protein-surfactant on a bubble surface is simulated mathematically.The model for the adsorption dynamics is developed based on the Ward-Tordai equation combined with the Frumkin adsorption isotherm. The simultaneous equations are solved using the Newton method for iteration. Base case adsorption and diffusion parameter values for the simulation were sourced from literature. It was found that protein arrives on the surface at a later time than surfactant. At this later time, the protein replaces the surfactant resulting in depletion of surfactant on the surface. There is, however, less protein adsorbed in the presence of more surfactant in the bulk. In contrast, more protein stays in the subsurface layer under these conditions. In addition to the base case simulation and a comparison to the experimental data available in the literature, a parametric study was performed to explore the effects of varying adsorption and diffusion parameters. The parametric study varying the protein surface affinity revealed that below a certain critical affinity, protein tends not to replace surfactant on the surface, even though the affinity of protein remains higher than that of surfactant. Therefore, protein molecules need to have sufficiently high affinity to displace surfactant molecules from the surface. Another parametric study setting a fixed protein surface affinity and varying relative diffusivity and surface affinity of surfactant (for a specified maximum possible surface capacity of surfactant) concluded that with high relative diffusivity and low surfactant affinity (relative to protein), the displacement of surfactant on the surface is more likely to occur.
    URI
    http://hdl.handle.net/11617/5043
    Collections
    • Simposium Nasional Teknologi Terapan (SNTT) II 2014

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    Publikasi IlmiahCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Login

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV