the balance in size between hydrophilic head and hydrophobic tail. A measure of this is the HLB, Hydrophilic-lipophilic balance. Higher HLB s urfactants ( 10) are hydrophilic (water loving) and form O/W (Oil -in-water) emulsions. Dish detergents, surfactants for emulsion. In the bulk aqueous phase surfactants form masses, such as micelles where the hydrophobic tails form the core and the hydrophilic heads are immersed in the surrounding liquid. Surface active agents play an important role as cleaning, wetting, dispersing, emulsifying, foaming and antifoaming agents in many practical applications and products, including: paints, emulsions adhesives, inks, biocides, shampoos, toothpastes, firefighting, detergents, insecticides, deinking of recycled papers, ski waxes, spermicides. Lipophilic surfactants possess low HLB values (1-10) and form W/O (water-in-oil) emulsions. In the general sense, any material that affects the interfacial surface tension, can be consider a surfactant,but in the practical sense, surfactants may act as wetting agents, emulsifiers, foaming agents, and dispersants.
A thesis about biosurfactant, surfactant, the word surfactant is a contraction of three word Surface Active Agent. Others types of structures can also be formed, such as spherical micelles or lipid bilayers. A, thesis, about, biosurfactant. Page i isolation AND characterization. Biosurfactant, producing bacteria from OIL contaminated soil A, thesis submitted to the National Institute of Technology, Rourkela. Biosurfactant, producing Bacteria from Oil. Microbial Culture Isolation of biosurfactant. Effect of different pH on biosurfactant production.
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