The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, surface roughness of self-supported montmorillonite clay films was studied by the use of fractal analysis to study its links with various inter-foliar cations, mechanical properties, and permeability. The Hurst exponent of fractional Brownian motion was estimated by maximum likelihood from optical images in reflection mode. Images corresponding to films with different inter-foliar exchanged...
A series of molecularly imprinted photocatalysts containing rhodamine B (RhB) as a template were prepared from four different routes, namely acid, basic-catalyzed, two-steps and non-hydrolytic sol–gel routes, using TiCl4 as a TiO2 source. Variations in acid route synthesis (rate of heat on calcination, absence of HCl and replacement of TiCl4 for commercial P25) were also evaluated. For comparison,...
The movement behavior of glycerol–water mixtures as sessile drops on a tilted PTFE incline is investigated here. The slip angles found showed complex relationships in relation to the mixture composition. Since the drop was found to breach its front contact line first, the levels of contact angle hysteresis did not have corresponding trends with the slip angles. However, the ratios of the drop lengths...
Aiming to prepare potentially biocompatible dextran-covered nanoparticles (NPs), the use of a pharmaceutically acceptable oil (Miglyol 810, M810—a medium chain saturated triglyceride) as co-stabilizer and of amphiphilic dextran derivatives (DexPτ) as stabilizers was investigated for Activator Generated by Electron Transfer Atom Transfer Radical Polymerization (AGET ATRP) of methyl methacrylate in...
A water-in-oil (W/O) microemulsion was prepared by mixing cyclohexane and HAuCl4 aqueous solution at the presence of a nonionic surfactant Triton X-100 and 1-hexanol. By successively adding sodium borohydride (NaBH4), ammonium hydroxide (NH3·H2O) and tetraethyl orthosilicate (TEOS) to this microemulsion, Au@SiO2 hybrid nanoparticles were produced which have been fully characterized by transmission...
Low energy emulsification methods have gained ground the recent years because of their simplicity in use and low cost. Our work was focused on the use of catastrophic phase inversion (CPI) technique for the formation of olive oil emulsions in the presence of bacterial cellulose (BC) and whey protein isolate (WPI). Firstly, phase behavior of the biopolymers was established. Then, surface and interfacial...
Amines supported on silica or alumina supports are among the most well-studied sorbents for CO2 capture from ultra-dilute sources, such as ambient air. Another class of sorbents that may also bind CO2 strongly enough to function well under ultra-dilute conditions are supported alkali metal based compositions. In this work, the synthesis of alumina-supported potassium (AlK) via calcination of impregnated...
Layer-by-layer adsorption of oppositely charged polyelectrolytes is a suitable method to improve the filtration properties of polyethersulfone (PES) membrane. Therefore, a weak polycation (poly(allylamine hydrochloride, PAH) was combined with either a weak polyanion (polyacrylic acid, PAA) or a strong polyanion (polystyrene sulfonate, PSS) to create a polyelectrolyte multilayer film (PEM) of 11 layers...
Monodispersed tri-layer structured cadmium sulfide/silica/sulfonated polystyrene (CdS/SiO2/SPS) nanospheres were synthesized and used as a photocatalyst to catalyze the degradation of pollutants in polluted water containing organic matters under solar light irradiation. Polystyrene (PS) layer was used to improve the dispersion of CdS/SiO2 in polluted water containing organic matters, and it was sulfonated...
In this work, graphene oxide (GO) and polyvinylpyrrolidone (PVP) were introduced into poly(vinylidene fluoride) (PVDF) membranes that were prepared through phase inversion induced by immersion precipitation technique. The effects of GO and PVP on hydrophilicity, pore morphology and porosity of membranes were systematically investigated. The results demonstrated that GO and PVP exhibited synergistic...
The physicochemical characterization of the structure and desorption relationship in tioconazole (TN)-assembled gold nanoparticles (AuNPs) was studied using density functional theory (DFT) calculations and Raman spectroscopy. UV–vis absorption spectroscopy and surface-enhanced Raman scattering (SERS) were performed to examine the loading of TN on the metal nanoparticle surfaces. From the SERS spectra,...
The attractive and tunable wetting behaviors extend the applications of nanofluids into many scientific and engineering areas; however, the corresponding mechanisms are not well understood. In this work, the time-dependent wetting radius and contact angle for various dilute nanofluid droplets were measured by the droplet spreading method. The effects of the nanoparticle material, loading and diameter,...
When a drop of aqueous surfactant solution is placed on a deep subphase of water, multiple phenomena occur. The contact line of the drop spreads until the drop merges with the subphase. A capillary wave train is initiated by the disturbance caused by the drop touching the subphase surface. Marangoni stresses cause the formation and propagation of a localized distortion of the subphase surface (subsequently...
Long-chain primary amines are not only good collectors for silicate minerals, but, they can also float some metallic sulfides. However, the flotation mechanism of sulfide minerals using long-chain primary amines as collector is uncertain. In this paper, the flotation performance and adsorption mechanism of dodecylamine in the flotation of sphalerite was studied using micro flotation tests, zeta potential...
We present a method of metallic nanoparticles (mNPs) deposition from water-based colloid onto solid substrates via electrospray technique. Gold nanoparticles (AuNPs) with the size of about 13nm were synthesized in water via chemical reduction method and characterized with UV–vis spectroscopy, dynamic light scattering (DLS), and atomic force microscopy (AFM). AuNPs were deposited via electrospray onto...
The measurements of the contact angle of the aqueous solutions of n-octyl-β-d-glucopyranoside (OGP) and monorhamnolipid (RL) on polytetrafluoroethylene surface (PTFE) as well as the water, diiodomethane and formamide on the PTFE covered by the OGP and RL layer were made at 293K. On the basis of the obtained contact angle the values of the critical surface tension of the PTFE wetting, adhesion work...
The recent development of scaffolds with controlled topography has garnered a good deal of interest from researchers in various fields. In this paper, the authors focused on thermal deformation during reactive ion etching (RIE) of monolayers of two-dimensional polystyrene colloidal crystals as a simple method for the fabrication of such scaffolds. Various interesting structures, such as micro-polygons...
The alumina sol doped with rhodamine B (RB) was concentrated to different degree and then dip-coated to prepare thin film. Dimerization of RB happens in the concentrated sol and the dip-coated thin film. As the sol concentrated, H-dimers are presented whereas in the dip-coated film J-dimers are displayed. When the dip-coated film is exposed to high humidity environment, J-dimer will transfer to H-dimer...
Globular proteins can be considered as nanotools useful to perform a variety of chemical reactions. These biological macromolecules have very complex and detailed topological characteristics responsible for their several functions, which can be used for technological applications.Albumin is one of the few commercially available proteins with potential use in the preparation of nanomaterials by the...
Silicic acid polymerization on metal oxide surfaces depends upon the orientation of sorbed monomers. This work explores how H4SiO4 polymerization at the water–iron oxide interface is influenced by the presence of arsenate (AsV), a sorbing ligand that does not participate in the polymerization. In situ infrared spectroscopy showed that the presence of a high surface coverage of AsV on the iron oxide...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.