Sustainable formulations are gaining increasing importance in a wide range of industrial sectors including cosmetics, homecare etc. This need for sustainability is causing a shift in the industry in potentially moving away from synthetic surfactants and replacing them with more sustainable alternatives. One possible route to this has been through the potential utilization of biosurfactants such as rhamonolipids and sophorolipids as emulsifiers. The challenge however has been adequate rheology build in these emulsion systems. In this study we illustrate that the addition of silica particles to biosurfactant stabilized water-in-oil emulsions significantly enhances the viscosity and impacts the viscoelastic response remarkably. The concentration of silica particles and the size of the particles was significantly seen to impact the rheological response. In addition to mechanical rheometry, optical microrheology through Diffusing Wave Spectroscopy (DWS) was carried out to gain insights into the high frequency (short time) dynamics in the system.

Engineering rheological response in water-in-oil emulsions through mixtures of rhamnolipid and sophorolipid biosurfactants with silica particles

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.