Bicontinuous microemulsions with extremely high temperature stability based on skin friendly oil and sugar surfactant

Effect of Protein Incorporation on the Nanostructure of the Bicontinuous Microemulsion Phase of Winsor-III Systems: A Small-Angle Neutron Scattering Study

“…Values of f a obtained for system 2a, −0.63 ≥ f a ≥ −0.92 (Table ), are comparable to those for system 1 (Table ) and those reported for other water/oil/surfactant/cosurfactant BμE systems. ,,,, Cytochrome c and lysozyme promoted a decrease in f a from −0.709 to −0.892 and −0.931, respectively, the latter two of which are near the f a value obtained for lamellar systems, −1.0. Chymotrypsin (1.0 g/L aq ) also decreased f a , ξ, and d , but to a much lesser extent than did lysozyme and cytochrome c (Table ).…”

“…Therefore, the effect of proteins on the structure of BμEs reveals a complex relationship, attributable to electrostatic attractive and perhaps hydrophobic interactions and protein size. The results suggest that controlling the relative strength of hydrophobic and electrostatic attractive interactions (e.g., by salinity and ethoxylate size) can be used to modify the interaction of proteins with charged membranes, relevant to the use of W III systems to purify proteins and the controlled release of biomolecules from BμEs drug delivery vehicles. − In addition, the protein-laden BμE phases are a relevant biomimetic system for cell membranes. (An aqueous plus oil nanochannel, with associated surfactant monolayers, is similar in structure to an oil-swollen lipid bilayer…”

“…Bicontinuous microemulsions (BμEs) are a unique nanostructured fluid formed from water, oil, surfactant, and perhaps cosurfactant, which are balanced in their oil and water contents. Similar to other μE systems, BμEs are isotropic, optically clear, and thermodynamically stable, but unlike the more commonly investigated water-in-oil (w/o-) and o/w-μEs, which possess spherical geometry, BμEs form interconnected nanodomains of oil and water (e.g., lamellae, spheres, or cylinders) separated by semiflexible surfactant monolayers existing at near-zero curvature. , Reviewed elsewhere, BμEs have several applications, including enhanced oil recovery, templating media for nanomaterials − and nanostructured gels, oral and transdermal delivery of hydrophilic and/or lipophilic drugs, − and hosting chemical and biochemical reactions, , including polymerization . In addition, BμEs have been formed from combining immiscible polymer blends with amphiphilic diblock copolymers, useful for polymer processing. , …”

Sugar Surfactant Based Microemulsions at Solid Surfaces: Influence of the Oil Type and Surface Polarity

“…At this scale, the bending of the membrane is superimposed by thermal fluctuations at smaller scales such that the larger the thermal fluctuations, the easier it is to deform the membrane. , Conversely, the bare bending modulus is associated with the high momentum cut off, given by the effective thickness of the amphiphilic films, l c . , The values of the renormalized and bare bending modulus for both series of microemulsions are between 0.3 k B T and 0.8 k B T . This is slightly lower than bending moduli commonly reported in the literature for nonionic microemulsion systems, for example, microemulsions stabilized with C i E j or sugar surfactants. − This suggests that the amphiphilic interface is highly flexible at all α . Nevertheless, it is important to point out that the renormalized bending moduli are comparatively larger for TD-microemulsions than for MO-microemulsions.…”

Experimental Investigation of the Wetting Ability of Microemulsion to Different Coal Samples

“…Microemulsion, a transparent or semi-transparent thermodynamically stable isotropic homogeneous liquid with ultra-low surface tension, was composed of water, oil (or other two-phase insoluble), surfactant and cosurfactant [23]. Microemulsions can dissolve hydrophobic and hydrophilic components [24], and exhibit high temperature stability in structure and phase [25], stable type for long-term storage [26], and coexistence of hydrophilic and lipophilic substances [27]. It has good water solubility and oil solubility [28,29], which allows coal seam wetting.…”