Surfactants Based on Natural Fatty Acids

Svensson, Martin

doi:10.1002/9780470686607.ch1

Cited by 12 publications

(13 citation statements)

References 82 publications

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“…Such one-component system is of great importance in some applications such as tertiary oil recovery where the wormlike micellar system free of hydrotropes can effectively prevent the 'chromatographic fractionation' from multicomponent displacing fluids. 40 On the other hand, in contrast with carbon dioxide-sensitive wormlike micellar systems formed by single UC22AMPM 38 or ODPTA, 37 erucic acid used here is akin to natural, renewable resources, which can be extracted from rapeseed plants, 55,56 without investing time and effort in organic synthesis. Moreover, both protonated UC22AMPM and ODPTA are cationic surfactants, which are generally more toxic and less biodegradable than anionic ones.…”

Section: Comparison With Other Carbon Dioxideresponsive Wormlike Micementioning

confidence: 99%

CO₂-responsive anionic wormlike micelles based on natural erucic acid

2014

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Research interests highlighted in recent years a remarkable growing focus on stimuli-responsive surfactant wormlike micelles, particularly those using carbon dioxide as the trigger. In this article, we report a novel carbon dioxideresponsive wormlike micellar system based on natural erucic fatty acid and examined its solution properties through rheology, Fourier transform infrared spectroscopy and cryo-tranmission electron microscopy. When carbon dioxide is introduced into the erucic acid solution, high-viscelastic wormlike micelles shift to low-viscosity solutions in short-time scale, accompanied by decrease in pH from 11·34 to 8·90, which is accounted for the effect of pH on the existence form of erucic acid in aqueous solutions. Bubbling nitrogen under heating cannot make a converse process since the viscoelastic worms can only be obtained at a high pH. Compared with other carbon dioxide-responsive wormlike micelles, the current one is more readily obtained and more environment-friendly because it can be formed by simply changing pH value of the natural erucic acid solutions without needing complex organic synthesis or addition of hydrotropes. IntroductionStimuli-responsive materials whose properties respond remarkably on minor environmental change have attracted much attention in the last decade.1-3 Among all such materials, colloids and micelles represent important soft matters and play crucial roles in various industrial applications.2 Different micellar morphologies can be obtained by self-assembly of amphiphilic compounds such as surfactants or block copolymers. 4 One of such fascinating morphological aggregates is the wormlike or threadlike micelles. Above a critical overlapping concentration (C*), the wormlike micelles entangle into a dynamic 3D transient network reminiscent of polymer solutions to display remarkable macroscopic viscoelastic properties. However, unlike the polymer entanglements, they break and recombine in a dynamic process, and are thus called 'living' or 'equilibrium' polymers. 5,6 Because of their unique micellar structures and rheological response, 7,8 viscoelastic fluids based on wormlike micelles have been a key focus of research in soft matter from both theoreticians and experimentalists for fundamental studies as well as industry applications, including rheology control, 8

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Section: Comparison With Other Carbon Dioxideresponsive Wormlike Micementioning

confidence: 99%

CO₂-responsive anionic wormlike micelles based on natural erucic acid

2014

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“…Thanks to the presence of a positively charged counter‐ion (Na + , K + , NH 4 + , etc. ), soaps are water‐soluble and showed good surfactant properties (Svensson, ). In aqueous solution, fatty‐acid soaps have the ability to agglomerate solid particles to larger ones changing their surface from hydrophilic to hydrophobic.…”

Section: Surfactants Based On a Natural Hydrophobic Tailmentioning

confidence: 99%

“…Thanks to the presence of a positively charged counter-ion (Na + , K + , NH 4 + , etc. ), soaps are watersoluble and showed good surfactant properties (Svensson, 2010). In aqueous solution, fatty-acid soaps have the ability (a) (b) Fig.…”

Section: Fatty-acid Soapsmentioning

confidence: 99%

Renewable Surfactants for Biochemical Applications and Nanotechnology

Guenic

Chaveriat

Lequart

et al. 2018

J Surfact & Detergents

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Surfactants find applications in almost every chemical industry, such as household and industrial cleaning, paper, inks, agrochemicals, and personal care or pharmaceuticals. However, their production and use can have a negative impact on the environment and health. Increasing environmental concerns and the strong interest in renewable resources have led to the development of innovative and environmentally friendly surfactants produced by clean and/or sustainable technologies. The aim of this review is to explore the different types of surfactants and their architectures. Then, it will describe the two categories of renewable surfactants: biosurfactants obtained by fermentation, and bio‐based surfactants containing either a bio‐sourced polar head group or a bio‐sourced hydrophobic tail. Finally, this review will focus on highly specialized applications of surfactants (protein crystallization, transfection, and nanotechnology), which are closely related to the ability of surfactants to organize themselves in supramolecular architectures.

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“…This has largely determined the value and use of oils and fats in food and oleochemical applications [7][8][9][10][11]. Lubricant application sets specifi c requirements to the oily feedstocks, both in terms of composition (See Table 5.4) and chemical and physical properties.…”

Section: Natural Vegetable Oils and Animal Fats In Lubricationmentioning

confidence: 99%