We investigate effects of surfactants with different charges (anionic, cationic, and non-ionic) on foam stability in the presence charge-stabilized silica (SiO2) nanoparticles. Toward this aim, a comprehensive series experiments Hele-Shaw cell column is conducted at bubble bulk-scale respectively, that is, investigating phenomenologies coarsening by gas diffusion coalescence, separately gravita...

PURPOSE To assess the postural stability and gait characteristics of adults with age-related maculopathy (ARM) and to identify the visual factors associated with postural stability and gait in this clinical population. METHODS Participants included 80 individuals with a range of severity of ARM (mean age, 77.2 years). Binocular visual function measures included visual acuity, contrast sensiti...

The effect of long chain alcohols (5 mol% CnOH for n = 8, 10, 12, 14, and 16) on the micellar stability of sodium dodecyl sulfate (SDS) solutions (SDS concentration ranging from 25 to 200 mM) was investigated and related to foaming properties, such as foamability, dynamic and equilibrium surface tension, and surface viscosity. The slow micellar relaxation time tau2, which is directly related to...

Gold nanoparticle-carbon foam composites with highly-dispersed gold nanoparticles confined in the cavities were prepared. The gold nanoparticles are effectively separated from each other by permeable carbon shells, which show high temperature stability and were fully accessible to the substrate.

We present herein a novel method to prepare free-standing Dried Foam Films (DFFs) whereby individual polynuclear manganese complexes cover quantitatively the holes of micro-grids; the fabricated, homogeneous films have a cross-sectional thickness of only ca. 5 nm and are characterised by high mechanical stability.

Sulfur doped graphene foam has been successfully synthesized by a simple solve-thermal method, which exhibited a much enhanced oxygen reduction reaction (ORR) catalytic activity as well as an especially high electrochemical stability, and would be a promising non-metal cathode catalyst for the ORR.

Switchable ethoxylated amine surfactants are readily soluble in CO2 and high-saline brines. The objective of the current work is to maximize foamability stability foam at 150 °F (65 °C) through adjustments surfactant concentration, pH, brine salinity. From results, authors recommend potential applications Ethomeen C12 (EC12) for oil/gas industry. Foam tests helped determine optimum parameters 7...

In the tunnelling industry, a large share of market is occupied by EPB (Earth Pressure Balance) machines. To operate this kind machine, radical change in rheological behaviour excavated soil must be performed, and achieved adding water, foam, and, eventually, polymers. The stability foam assessed through half-life test. main limitation test that only one value used characterization degradation ...

Mesoporous MnO2 nanosheet arrays have been directly grown on nickel foam current collectors and exhibited a reversible capacity as high as 1690 mA h g(-1) even after one hundred cycles at 100 mA g(-1). They also reveal good rate capability and excellent cycling stability.