A review on natural surfactants

De, Sourav; Malik, Susanta; Ghosh, Aniruddha; Saha, Rumpa; Saha, Bidyut

doi:10.1039/c5ra11101c

Cited by 311 publications

(151 citation statements)

References 75 publications

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“…[16][17][18] Thus, for establishing this relationship, different solutions containing different concentrations of this biosurfactant were prepared and their surface tension was measured using a tensiometer Kruss EasyDyne, choosing the Wilhelmy plate method. [16][17][18] Thus, for establishing this relationship, different solutions containing different concentrations of this biosurfactant were prepared and their surface tension was measured using a tensiometer Kruss EasyDyne, choosing the Wilhelmy plate method.…”

Section: Determination Of the Critical Micellar Concentration Of Biosmentioning

confidence: 99%

Adsorption of natural surface active compounds obtained from corn on human hair

et al. 2016

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In this work, an aqueous solution containing surface-active compounds, extracted from corn steep liquor (CSL), was added to human hair and its adsorption was studied by applying an incomplete factorial design.The independent variables established in the study were temperature (20-50 C), pH (5-7) and treatment time (2-30 min); whereas the dependent variable studied was the adsorption capacity of hair. It was observed that the adsorption of the biosurfactant onto hair was very fast, occurring few minutes after starting the experiments. The time was, in the range studied, the least significant independent variable while temperature had an important effect on the adsorption of this biosurfactant onto hair. It was observed that the capacity of hair to adsorb the biosurfactant was improved at low temperatures. Moreover, pH had an intermediate significant effect, mainly at middle or high temperatures, meanwhile at low temperatures, the pH, in the range studied, almost did not affect the adsorption process. At the higher concentration of biosurfactant, hair was able to adsorb the biosurfactant with a maximum capacity of 3679 mg g À1 .

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Section: Determination Of the Critical Micellar Concentration Of Biosmentioning

confidence: 99%

Adsorption of natural surface active compounds obtained from corn on human hair

et al. 2016

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“…Natural surfactants, also termed biosurfactants or microbial surface active agents, are amphiphilic compounds of biological origin produced by a variety of microorganisms -including bacteria, yeasts, and fungi -from various substances and sometimes also from waste materials. They are usually classified into low molecular weight compounds (lipopeptides, glycolipids) and high molecular weight polymers [6]. Thanks to their unique properties, such as low toxicity, functionality under extreme conditions, biodegradable nature, and specific action, biosurfactants have several potential applications in the petroleum industry, mainly for the so-called microbial enhanced oil recovery (MEOR) [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Evaluating the potential of natural surfactants in the petroleum industry: the case of hydrophobins

Blešić

Dichiarante

Milani

et al. 2017

Pure and Applied Chemistry

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Enhancing oil recovery from currently available reservoirs is a major issue for petroleum companies. Among the possible strategies towards this, chemical flooding through injection of surfactants into the wells seems to be particularly promising, thanks to their ability to reduce oil/water interfacial tension that promotes oil mobilization. Environmental concerns about the use of synthetic surfactants led to a growing interest in their replacement with surfactants of biological origin, such as lipopeptides and glycolipids produced by several microorganisms. Hydrophobins are small amphiphilic proteins produced by filamentous fungi with high surface activity and good emulsification properties, and may represent a novel sustainable tool for this purpose. We report here a thorough study of their stability and emulsifying performance towards a model hydrocarbon mixture, in conditions that mimic those of real oil reservoirs (high salinity and high temperature). Due to the moderate interfacial tension reduction induced in such conditions, the application of hydrophobins in enhanced oil recovery techniques does not appear feasible at the moment, at least in absence of co-surfactants. On the other hand, the obtained results showed the potential of hydrophobins in promoting the formation of a gel-like emulsion 'barrier' at the oil/water interface.

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“…Though the crucial benefit of bio‐surfactants over chemically synthesized surfactants have already been mentioned before in the introduction. Bio‐surfactants have lower CMC, lower toxicity, higher biodegradability, more compatibility to environment, mildly affected activity at extreme pH or temperature, biologically diverse activities like antiviral, antimicrobial or haemolytic activity . On the basis of chemical structure, bio‐surfactants are classified into the following classes–glycolipids, lipopeptides, particular surfactants, fatty acids, phospholipids, neutral lipids and polymeric surfactants …”

Section: Classificationmentioning

confidence: 99%

Novel Amphiphiles and Their Applications for Different Purposes with Special Emphasis on Polymeric Surfactants

et al. 2019

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Amphiphiles or surfactants are widely known for its reducing power of interfacial tension and extraordinary rheological properties. Among the various classes of surfactants gemini surfactants, biosurfactants and polymeric surfactants are remarkable and distinguishable among the others for their structural diversity and profitable usefulness. Primarily, the performance of any surfactant can be determined by HLB (Hydrophile Lipophile Balance) value, an empirical parameter. This review attempts to clarify some of the terminology used in literature by providing illustration of classification, features and diverse applications of different surfactants.

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A review on natural surfactants

Cited by 311 publications

References 75 publications

Adsorption of natural surface active compounds obtained from corn on human hair

Adsorption of natural surface active compounds obtained from corn on human hair

Evaluating the potential of natural surfactants in the petroleum industry: the case of hydrophobins

Novel Amphiphiles and Their Applications for Different Purposes with Special Emphasis on Polymeric Surfactants

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