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 result is a decrease in the average distance between the micelles and hence an increase in intermicellar repulsion. Chemistry, interfacial properties, applications, volume 1st edition. To be a surfactant a molecule must have both a polar. Please fill out the form on the bottom left of this page. 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. To be a surfactant a molecule must have both a polar hydrophilic or lipophobic region not necessarily large and a nonpolar hydrophobic or lipophilic region which must be large in.
In the dyeing of textiles, surfactants help the dye penetrate the fabric evenly. Tcholakova department of chemical engineering, faculty of chemistry, sofia university, sofia, bulgaria lecture at cost p21 training school physics of droplets. This will cause the decrease in surface or interfacial tensions. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that. In the bulk aqueous phase, surfactants form aggregates, such as micelles, where the hydrophobic tails form the core of the aggregate and the hydrophilic heads are in contact with the surrounding liquid.
The adobe flash plugin is needed to view this content. Alcorn, in lung epithelial biology in the pathogenesis of pulmonary disease, 2017. Chemistry free download as powerpoint presentation. Illustrated glossary of organic chemistry surfactant. Phase equilibria of catanionic surfactantwater systems the. Jul 12, 2017 in the presence of a pathology, when surface tension is high and surfactant production is low, this can lead to infant respiratory distress syndrome, which is described in this video. This book is designed to give practical help to those involved with the use of surface active agents or surfactants. Free chemistry powerpoint templates are made, while keeping in mind students who are required to give clear. Physical chemistry of surfactant action surfactant science series hardcover january 1, 1981 by e. However, here we describe how a so far unknown phenomenon, that of drastically decreasing the surface tension of surfactant solutions by lowering the solutions. Ppt koloid2 free download as powerpoint presentation. Surfactants are a common ingredient in detergents and other cleaning products. Motivated by this, we report here a bioinspired surfactant catalyst that incorporates a variety of chemical functionalities. Funding has been provided by cemast to produce and mail out instructional cds.
Gerrard marangoni3 1petroleum recovery institute, 100, 3512 33rd st. Mar 31, 2019 surfactant molecules are usually organic compounds that contain hydrophobic groups or tails and hydrophilic groups or heads. A molecule that lowers the surface tension of a liquid, or the interfacial tension between two liquids. A molecule that reduces the surface tension of water. Surfactant is produced by type ii cells in the wall of the alveolus 83, 84, as is ha 85, 86. The book is a straightforward and practical survey of the chemistry of surfactants and their uses, providing a basic introduction to surfactant theory, information on the various types of surfactant and some application details. The short course in surfactant science and technology course provides indepth understanding of surfactant processes and technologies to key teams and personnel. Photograph your local culture, help wikipedia and win. Colloid chemistry is closing the gap between molecular chemistry and solid state properties. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects.
This allows the molecule to interact with both water a polar molecule and oils which are nonpolar. Phase equilibria of catanionic surfactantwater systems. Once the surfactant is added to water, the waterfearing ends try to stay away from the water. Gerrard marangonic a saskatchewan research council, 15 innovation blvd. They are amphiphilic molecules and are thus absorbed in the airwater interface. The term surfactant comes from the words surface active agent. In the present study one of the most common classes of chemicals used in such situations i. Schematic diagram of a micelle of oil in aqueous suspension, such as might occur in an emulsion of oil in water. Surfactant science and technology pdf free download. Learn about the chemistry of cleaning and how surfactants react with soil and water to clean everything from laundry to dishes and everything in between. Rather surfactant adsorption and aggregation properties are exploited in improving wellknown techniques or are the basis of new techniques such as cloud. For example, during the process of pesticide spraying, more than 50% of agrochemicals are lost because of the undesired bouncing and splashing behaviors on hydrophobic or.
In the presence of a pathology, when surface tension is high and surfactant production is low, this can lead to infant respiratory distress syndrome, which is described in this video. Thermal energy and coulombic forces keep surfactant monomers and aggregates in motion, and in. Nw, calgary, ab, canada t2l 2a6 2 university of calgary, dept. Most helpful is a brief glossary of terms relating to surfactant chemistry. Works as a foaming agent, emulsifier and dispersant. At the interface, they align themselves so that the hydrophobic part is in the air and hydrophilic part is in water. Surfactants are used to alter spray solution properties so that herbicides can be more effectively applied to and absorbed by target plant foliage. Surfactants are one of many different compounds that make up a detergent. Controlling liquid splash on superhydrophobic surfaces by a. Surfactant, substance such as a detergent that, when added to a liquid, reduces its surface tension, thereby increasing its spreading and wetting properties.
The term surfactant is derived from the term surface active agent and is defined as a substance which at low concentration has the property of absorbing onto the surfaces or interfaces of a system and altering the surface or interfacial energies of those surfaces or interfaces. Surfactants chemistry and its application introduction 1 1 surface and. Bonnie anderson bray, in chemistry and biology of hyaluronan, 2004. When removal of napl or sorbed compounds is the intent, anionic andor nonionic surfactants are utilized, as loss of surfactant to the aquifer solids is minimized. Cholesterol is currently removed from most lung surfactant extract preparations used in clinical applications. Updated website with files now available in pdf, word 2007 and powerpoint 2007.
The true surface tension value of a solvent or a solution, being an intensive thermodynamic quantity, should not depend on extensive parameters such as the diameter of a container or the filling height of the liquid. The result will be improved products and processes and increased corporate efficiency and profitability. Surfactant is being considered as a very demandable molecule in the field of chemistry. Open the file from within powerpoint, and you will have a fully editable version of the presentation. However, here we describe how a so far unknown phenomenon, that of drastically decreasing the surface tension of surfactant solutions by lowering the solutions level in. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Surfactants classification, features and applications. Rds is due to surfactant deficiency, which increases the surface tension at the airliquid interface of the terminal respiratory units. Ppt surfactants powerpoint presentation, free download id. Surfactant structure all surfactants are characterized by having two regions in their molecular structure.
Chapter 2 covers the organic chemistry of surfaceactive molecules, based on the wellknown classification by type. Surface tension of surfactant solutions the journal of. Surfactants or tensides are chemical species that act as wetting agents to lower the surface tension of a liquid and allow for increased spreadability. They are added to remove dirt from skin, clothes and household articles particularly in kitchens and bathrooms.
A multifunctional surfactant catalyst inspired by hydrolases science. Pdf applications of surfactants in modern science and. This course is ideal for scientists and engineers with a good background in. A free powerpoint ppt presentation displayed as a flash slide show on id. Free chemistry powerpoint templates are made, while keeping in mind students who are. Phase behavior and rheological properties of a saltfree catanionic surfactant ttaohlah2o system. In this example, the surfactant molecules oilsoluble tails project into the oil blue, while the watersoluble ends remain in contact with the water phase red.
This chapter discusses the chemistry of surfactants. The surfactant itself is not the primary subject of investigation here. Surfactants are compounds that lower the surface tension between two liquids, between a gas and a liquid, or between a liquid and a solid. 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. Whether it is an organic or inorganic reaction, it can be explained with free chemistry ppt backgrounds. Introduction to surfactants authorstream presentation. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. The molecules at the surface do not have other molecules on all sides of them and therefore are pulled inwards. Surfactant associates offsite short course in surfactant. Surfactant chemistry and general phase behaviour 1. Surfactant chemistry research virginia department of.
Other types of aggregates can also be formed, such as spherical or cylindrical micelles or lipid bilayers. Surfactant is the word that combines the terms surface active agent. Important in colloid and surface chemistry and biology surfaceactive agent. Surfactant chemistry research fact sheet jerre creighton september 2006 abstract. Effect of cholesterol on the molecular structure and.
Surfactant is produced exclusively by alveolar type ii epithelial cells and stored in specialized organelles called lamellar bodies lbs until it is secreted into the lumen of the alveolus. The science of surfactants lab muffin beauty science duration. Class xi new final exam surface chemistry redox reaction pblock sblock hydrogen m. Large surface area to volume ratio size appropriate for scattering light. Surfactant definition surface active agent substance which reduces surfaceinterfacial tension between two phases compounds having tendency to gather around the interface between two different materials by altering the properties of interface remarkably serves as good mediator to settle. Surfactant is produced exclusively by alveolar type ii epithelial cells and stored in specialized organelles called lamellar bodies lbs. All worksheets have answers and work typed in equation editor and are editable. Templates include iron, chemistry test tube, entropy, and nuclear medicine among others. Some examples of surfactant applications in the petroleum industry gasliquid systems producing oilwell and wellhead foams. Cholesteroldepleted samples are also used in most in vitro studies of the lung surfactant layer. The chemistry of cleaning the american cleaning institute aci. Surfactants surface acting agent reduces surface tension.
It has a hydrophobic nonpolar, fatloving tail and a hydrophilic polar, waterloving head. Surfactant solutions with additional additives can affect other water chemistry or aquifer properties, most notably groundwater viscosity, salinity, and solid phase carbon content. Ppt surface chemistry powerpoint presentation free to download id. The journal of physical chemistry b 2008, 112 34, 10508. Download highres image open in new tab download powerpoint. Deposition of liquid droplets on solid surfaces is of great importance to many fundamental scientific principles and technological applications, such as spraying, coating, and printing. Surfactants can be used as detergents, wetting agents, emulsifiers, foaming agents and dispersants.
How to develop effective study habits mar, 2020 pdf view jh sir physical chemistry notes for class 12 mar 8, 2020 pdf nv sir 11th class physics notes for jee and boards feb 27, 2020 pdf download nv sir physics notes complete for jee feb 22, 2020. Controlling liquid splash on superhydrophobic surfaces by. This creates some internal pressure and forces liquid surfaces to contract to the minimal area. The journal of physical chemistry b 2008, 112 47, 1486914876.
Remove this presentation flag as inappropriate i dont like this i like. A term surfactant comes from the word surface active agent. Surfactants ppt1 surfactant physical chemistry free 30. With regard to the occurrence of related colloidal systems in the petroleum industry, three recent books table 1. Introduction surface chemistry is the study of processes that occur at the interface of two bulk phases.
Pdf download allen jee mains 2020 minor and major test papers with solutions apr 12, 2020. Surfactants classification, features and applications surfactants classification, features and applications n. Ppt surface chemistry powerpoint presentation free to. Surface active substances or surfactants are amphiphilic compounds having a lyophilic, in particular hydrophilic, part polar group and a. It is intended particularly for new graduate and postgraduate chemists and chemical engineers at the beginning of their industrial careers and for those who, in later life, become involved with surfactants for the first time. Figure 1 shows the impacts of droplets of pure water and aqueous solutions containing the same mass fraction of the micelle surfactant sodium dodecyl sulfate sds, trisiloxane molecules tss, and the vesicle surfactant sodium bis2ethylhexyl sulfosuccinate aerosol ot aot on a brassica oleracea l. Pulmonary surfactants and their role in pathophysiology of. In our study we have performed a detailed molecular characterization of the structure of the lung surfactant with regard to cholesterol content and temperature.
828 1259 714 1641 982 1459 126 881 858 1397 1573 1105 666 550 1397 561 1127 78 513 461 1133 976 376 843 811 277 1427 244 1429 982 1212 686 1396 293 1455