We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Interfacial rheology insights: particle texture and Pickering foam stability
Summary
Researchers studied the interfacial rheology of particle-laden interfaces stabilized with fumed and spherical colloidal silica particles, finding that particle texture significantly affects interfacial mechanical properties and the resulting stability of Pickering foams.
Interfacial rheology studies were conducted to establish a connection between the rheological characteristics of particle-laden interfaces and the stability of Pickering foams. The behavior of foams stabilized with fumed and spherical colloidal silica particles was investigated, focusing on foam properties such as bubble microstructure and liquid content. Compared to a sodium dodecyl sulfate-stabilized foam, Pickering foams exhibited a notable reduction in bubble coarsening. Drop shape tensiometry measurements on particle-coated interfaces indicated that the Gibbs stability criterion was satisfied for both particle types at various surface coverages, supporting the observed arrested bubble coarsening in particle-stabilized foams. However, although the overall foam height was similar for both particle types, foams stabilized with fumed silica particles demonstrated a higher resistance to liquid drainage. This difference was attributed to the higher yield strain of interfacial networks formed by fumed silica particles, as compared to those formed by spherical colloidal particles at similar surface pressures. Our findings highlight that while both particles can generate long-lasting foams, the resulting Pickering foams may exhibit variations in microstructure, liquid content, and resistance to destabilization mechanisms, stemming from the respective interfacial rheological properties in each case.
Sign in to start a discussion.
More Papers Like This
Hydrophobisation of Silica Nanoparticles Using Lauroyl Ethyl Arginate and Chitosan Mixtures to Induce the Foaming Process
Silica nanoparticles were coated with a mixture of chitosan and a biodegradable surfactant to make them partially hydrophobic and capable of stabilizing foam films. The study found that small amounts of the surfactant promoted foam formation by reducing the surface tension around the nanoparticles. Stable biodegradable foams have potential applications in food processing and environmental cleanup.
Evaluation of Ceramic Membrane Filtration for Alternatives to Microplastics in Cosmetic Formulations Using FlowCam Analysis
Ceramic membrane crossflow filtration was evaluated for removing silica powder and cornstarch—common microplastic alternatives in cosmetics—with FlowCam particle analysis revealing high removal efficiency and insights into particle behavior that can guide greener cosmetic formulation strategies.
The bouncing threshold in silica nanograin collisions
This molecular dynamics simulation study characterized collision behavior between nanoscale silica particles, identifying the threshold between sticking and bouncing under different impact conditions. It is a materials physics paper with no direct connection to microplastics or environmental health.
Weathering effects of secondary microplastics from expanded polystyrene foam on interactions with palmitic acid monolayers
Researchers generated size-fractionated microplastics and nanoplastics from photochemically weathered expanded polystyrene foam via colloidal ball-milling and found that weathered particles caused greater disruption to palmitic acid monolayers than commercial microbeads, primarily due to their colloidal stability and negative surface charge.
Surface topography of nanoplastics modulates their internalization and toxicity in liver cells
Researchers found that the surface topography of nanoplastics significantly affects their internalization and toxicity in liver cells, revealing that surface roughness and texture modulate how these particles interact with cellular systems.