Microemulsions are clear, thermodynamically stable, isotropic liquid mixtures of oil, water, and surfactant, frequently in combination with a cosurfactant. Research on nanotechnology application in the oil and gas. Dispersion stability of sdbs was better than sds at all concentration levels. It is also found that water to surfactant molar ratio w o and the nature of co surfactant is a vital factor in the morphology and optical properties of cds nanoparticles. Cationic versus anionic surfactant in tuning the structure.
Preparation of dispersed, amorphous, spherical silica nanoparticles using cationic surfactant as organic template, tetraethoxysilane teos as. Surfactants find applications in almost every chemical industry, such as household and industrial. Surfactant are substances whose molecule exhibits both polar and apolar groups. Nano emulsions are transparent or translucent systems mostly covering the.
Nanoemulsion formation by the socalled dispersion or highenergy emulsification methods is generally achieved using highshear stirring. Introduction the lungs of preterm infants lack adequate pulmonary surfactant, a constituent of the air liquid interface, that normally lines the alveolar surfaces and terminal airways. A molecule that reduces the surface tension of water. Surfactant concentration above or below this ratio was shown to decreases the stability of dispersion. Also explore the seminar topics paper on nano concrete with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015 2016. Selfassembled surfactant nano structures important in drug delivery. In addition, the potential of the nanofluid in recovering oil was. Selfassembled surfactant nanostructures important in. Nano is a prefix used to describe one billionth, or 10. Surfactants classification, features and applications surfactants classification, features and applications n. These are the thermodynamically stable isotropic system in which two immiscible liquids are mixed to form a single phase by means of an emulsifying agent, i. It is also found that water to surfactant molar ratio w o and the nature of cosurfactant is a vital factor in the morphology and optical properties of cds nanoparticles. Works as a foaming agent, emulsifier and dispersant.
Novel nanoparticles systems solid lipid nanoparticles sln these are submicron colloidal carriers 50nm, composed of physiological lipid,dispersed in water or in aqueous surfactant solution. Nano surfactant system improves post frac oil and gas. Pdf vital role of nanopolymers in drilling and stimulations fluid. The concept of nanotechnology was first discussed in 1959 by richard feynman in his talk theres plenty of room at the bottom in 1974 norio taniguchi used the term nanotechnology for the first time. Emulsions 1, 2 the dispersion of one liquid phase within a second immiscible host liquidappear in numerous applications, including a range of drug delivery systems 1, 3,4,5,6,7,8,9. Oil and water are immiscible and they separate into two phases when mixed, each saturated with traces of the other component capek, 1999. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. The primary purpose of using surfactants in stimulating hydrocarbon rich gas reservoirs is to reduce interfacial tension, andor modify contact angle and reservoir wettability. Explore nano concrete with free download of seminar report and ppt in pdf and doc format. Nanoparticle interaction with model lung surfactant monolayers. Thus, the solvent diffusion towards the aqueous phase, generating nano emulsions causes the polymer to precipitate uniformly within the nano emulsion template. Oil surfactants and co surfactant smix were grouped together for phase study.
Surfactant structure all surfactants are characterized by having two regions in their molecular structure. Effect of surfactant concentration on the size of coated ferromagnetic nanoparticles t. Such powders offer some process and performance advantages to liquid phase hydrotropic cubosome precursors. Tenary phase diagram of microemulsion courtesy of advanced. Recent advances in application of nanotechnology in chemical. Nano came from the greek word dwarf means billionth. A a hydrophobic group, such as a hydrocarbon chain, that has no affinity for aqueous solvents b a hydrophilic group that has an affinity for water. Jun 12, 2012 commercial natural surfactant types and composition surfactant conc ofsurfactant origin protein b initial dose repeat dosing schedule phospholipid content porcine lung minces, lipid extraction withporactant 0. Consequently, energy input, generally from mechanical devices or from the chemical potential of the components, is required. The surfactantstabilized nano cavities typically in the range of 10 nm provide a confinement effect that limits particle nucleation, growth, and agglom. Besides phospholipids, four surfactantspecific proteins have been found to be associated with lung surfactant ls. Few decades ago, the surfactant and polymer flooding were the most common ceor methods.
The structure and interaction in complexes of anionic ludox hs40 silica nanoparticle, anionic bovine serum albumin bsa protein, and cationic dodecyl trimethylammonium bromide dtab surfactant have been studied using smallangle neutron scattering sans. Nanoemulsions are transparent or translucent systems mostly covering the. Role of surfactants in nanotechnology and their applications. In our case, the obtained powder consists of 1020 nanosized ferromagnetic particles. She is currently working on the vectorization of contrast agents for molecular imaging. Pdf effect of cosurfactant on cds nps nano trends 2010. Selfassembled surfactant nanostructures important in drug delivery. Rds is due to surfactant deficiency, which increases the surface tension at the airliquid interface of the terminal respiratory units. Although surfactants can decrease the surface tension of the liquid, helping it spread on a hydrophobic surface under a lowspeed impact, the reduction of surface tension also plays a major.
A surfactant mixture that shows a reduction in surface tension compared with the individual components can be used. A term paper on nanaofiltration and its charge effects. Her studies were performed at the university of monshainaut, where she received her masters degree in. Effect of surfactant concentration on the size of coated. Nonionic polar groups such as oh or o ether link are not very polar, and thus must occur several. Effects of interplay of nanoparticles, surfactants and base.
An introduction to nanoparticles and nanotechnology book. Increasing in world oil demands versus declining world oil production highlights the importance of the enhanced oil recovery eor process in oil reservoirs. Lets have a closer look on the model again pv 0a e l 0 a e. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. The border between two materials extremity thin layer very small amount nano world controlled by surface tension surface free energy. A typical example of a doublechain surfactant is sodium bis2ethylhexylsulfosuccinate, often referred to by its american cyanamid trade name aerosolot, or aot. Renewable surfactants for biochemical applications and. Paper open access related content studies on effect of. Preparation of gold nanocomposites with tunable charge and.
This is the usual shape at surfactant concentrations below about 40 per cent, spherical vesicle bilayer structure. Nanofluids, the fluid suspensions of nanomaterials, have shown many interesting properties, and the distinctive features offer unprecedented potential for many applications. The polar group contains hetereoatoms such as o, s, n, p, as part of some functional group such as carboxylate, sulfonate, sulfate, ammonium, phosphate, etc. However, many surfactants either adsorb rapidly within the first few inches of the formation, or negatively impact reservoir wettability, thus reducing their. Since then, there have been many revolutionary developments in physics, chemistry and biology. Delaware basin, midland basin, wolfcamp, spraberry, eagle ford. Selfassembled surfactant nanostructures important in drug. Nano surfactant system improves post frac oil and gas recovery in hydrocarbon rich gas reservoirs. Classical examples are the works of fessi et al, or leroux et al. The nano particles modify the fluid properties, and suspensions of nanosized. The result is a decrease in the average distance between the micelles and hence an increase in intermicellar repulsion. Surfactants classification, features and applications.
Microemulsion is a technique for the synthesis of nanoparticles in which two immiscible fluids such as water in oil. A a hydrophobic group, such as a hydrocarbon chain, that has no affinity for aqueous solvents b a. Pulmonary surfactants and their role in pathophysiology of. Tcholakova department of chemical engineering, faculty of chemistry, sofia university, sofia, bulgaria lecture at cost p21 training school physics of droplets.
Functional role of cationic surfactant to control the nano size of silica. If it is used as stabilizer for nano particles, we can have in similar way emulsion surfactants, dispersion surfactants, adsorption surfactants despite the same surfactant used for stabilization. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. They show interesting phenomena in solution by modifying the interfacial and bulksolvent properties. Nanoemulsions, being nonequilibrium systems, cannot be formed spontaneously. Apr 08, 2014 nanoemulsions are nano sized emulsions, which are manufactured for improving the delivery of active pharmaceutical ingredients. The aqueous phase may contain salts andor other ingredients, and the oil may actually be a complex mixture of different hydrocarbons and olefins. Water was used as an aqueous phase for the construction of phase diagram. John rapko, senior research associate, has authored the environmental developments section of primary surfactant opportunities.
Due to magnetic interaction, they tend to agglomerate, which is possible because the. Pdf production of hydrocarbons from conventional, as well as unconventional. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Morsy1,2 1chemistry department, faculty of science, taif university, kingdom of saudi arabia 2egyptian petroleum research institute nasr city, cairo, egypt corresponding author. Gemini surfactant free download as powerpoint presentation. It has been argued that the surfactant reduces the capillary. Slns as colloidal drug carrier combines the advantages of polymeric nanoparticles, fat emulsions and liposomes. The results are compared with similar complexes having anionic sodium dodecyl sulfate sds surfactant mehan, s. Neglected role of the surfactant tail what is the role of the tail. In contrast, neither the destabilization nor the resolubilization effects of the added dodecyl maltoside were obsd.
Suria prabha hindu college of pharmacy, amaravati road, guntur, andhra pradesh, india. Creating nanoscale emulsions using condensation nature. The concept of nanotechnology was introduced by physics nobel laureate richard p feynman in his famous lecture entitled theres plenty of room at the bottom at the december 1959 meeting of the american physical society. It is suitable for encapsulation of the lipophilc and oil soluble compound they are generally obtain by interfacial polymerization of alkyalcyanoacrylates ethanol or acetone serve as vehicle for the monomer polymerization of monomer induced by the contact with hydroxyl ion from the water phase must be sufficient to allow efficient. Surfactants or surface active agents are a special class of versatile amphiphilic compounds that possess spatially distinct polar hydrophilic head and nonpolar hydrophobic tail group. The area a occupied by a surfactant molecule at the solutionair interface can be calculated from a 1n a 23. If possible, the surfactant is dissolved in the disperse phase rather than the continuous phase this often leads to smaller droplets. A nano particle madhurilatha thadanki, paruchuri srivalli kumari and k. Drug dispersion with high speed stirring surfactant solution high pressure homognization 1500 bar pressure nano. Oil surfactants and cosurfactant smix were grouped together for phase study. Combined particle and surfactant effect on surface tension of complex nanofluid.
Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. So, available natural, lowcost surfactants give an opportunity to recover remaining oil via wettability alteration and lowering the interfacial tension between oil and water in the subset of a chemical process. Parameter characterization method particle size and size distribution charge determination laser doppler anemometry zeta potentiometer chemical analysis of surface static secondary ion mass spectrometry sorptometer carrier drug interaction differential scanning calorimetry photon correlation spectroscopy. Thus, the solvent diffusion towards the aqueous phase, generating nanoemulsions causes the polymer to precipitate uniformly within the nanoemulsion template. Application of nanoparticles in enhanced oil recovery. Energent is the north america unconventional market intelligence service by westwood global energy group. Spa and spd, large hydrophilic proteins, are involved in the regulation of surfactant homeostasis and alveolar defence reid 1998.
Ppt koloid2 free download as powerpoint presentation. Dec 07, 2017 at appropriately large nonionic surfactant concns. Nanoemulsions are nanosized emulsions, which are manufactured for improving the delivery of active pharmaceutical ingredients. Surfactantaugmented functional silica nanoparticle based. Tween 20 and ethanol were used as surfactants and co surfactant respectively. Surfactant and co surfactant in group was mixed in weight ratio 1. Controlling liquid splash on superhydrophobic surfaces by. This paper summarizes the recent progress on the study of nanofluids, such as the preparation methods, the evaluation methods for the stability of nanofluids, and the ways to enhance the stability for nanofluids, the.
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