Surfactants from Renewable Resources

Kjellin, Mikael; Johansson, Ingvar

doi:10.1002/9780470686607

Cited by 91 publications

(8 citation statements)

References 292 publications

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“…Only a few studies have attempted to identify the surface-active molecules responsible for the reduced ST in PF. Initial tests with several members of Sarraceniaceae failed to detect saponins [18], a type of organic surfactant found in various plants [47,48]. Recently, both the ant retention rate and the ST value of D.…”

Section: Lower Surface Tension Of Pf Facilitates Sinking Of Insect Preymentioning

confidence: 99%

How a sticky fluid facilitates prey retention in a carnivorous pitcher plant (Nepenthes rafflesiana)

Kang¹,

Isermann

Sharma

et al. 2021

Preprint

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Nepenthes pitcher plants live in nutrient-poor soils and produce large pitfall traps to obtain additional nutrients from animal prey. Previous research has shown that the digestive secretion in N. rafflesiana is a sticky viscoelastic fluid that is much more effective at retaining insects than water, even after significant dilution. Although the physical properties of the fluid are important for its retentive function, it is unclear how the fluid interacts with insect cuticle and how its sticky nature affects struggling insects. In this study, we investigated the mechanisms behind the efficient prey retention in N. rafflesiana pitcher fluid. By measuring the attractive forces exerted on insect body parts moving in and out of test fluids, we show that it costs insects significantly more energy to separate from pitcher fluid than from water. Moreover, both the maximum force and the energy required for retraction increase after the first contact with the pitcher fluid. We found that insects sink more easily into pitcher fluid than water and, accordingly, the surface tension of N. rafflesiana pitcher fluid was significantly lower than that of water (60.2 vs. 72.3 mN/m). By analysing the pitcher fluid dewetting behaviour, we demonstrate that it strongly resists dewetting from all surfaces tested, leaving behind residual films and filaments that can facilitate re-wetting. This inhibition of dewetting may be a further consequence of the fluid's viscoelastic nature and likely represents a key mechanism underlying prey retention in Nepenthes pitcher plants.

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Section: Lower Surface Tension Of Pf Facilitates Sinking Of Insect Preymentioning

confidence: 99%

How a sticky fluid facilitates prey retention in a carnivorous pitcher plant (Nepenthes rafflesiana)

Kang¹,

Isermann

Sharma

et al. 2021

Preprint

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“…Surfactants based on natural starting materials can often be made more biodegradable, less toxic and less allergenic. Renewable sources of hydrophilic groups include carbohydrates, proteins, amino acids and lactic acid, and sources of the hydrophobic moiety are steroids, monoterpenes, rosin acids, fatty acids and long chain alkyl groups, as well as aromatic compounds (Kjellin and Johansson, 2010). Rosin is reputed as green petroleum because it is renewable, not expensive, and environmental friendly.…”

Section: Surfactants From Renewable Resourcesmentioning

confidence: 99%

“…S urface-active agents (usually referred as surfactants, synthetic and biobased) are active at interfaces and possess both polar (hydrophilic) and non-polar (hydrophobic) characteristics in the same molecule. The hydrophobic part is referred to as the head group and the hydrophobic part as the tail (Corrigan and Healy, 2006); Kjellin and Johansson, 2010;Monsteqszia and Haqqueniq, 2012;Schramm et al, 2003) (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Surfactants: Pharmaceutical and Medicinal Aspects

Sekhon¹

2013

JPTRM

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Surfactants are amphipathic substances with lyophobic and lyophilic groups and are critical components in pharmaceutical products. Surfactants have several uses in pharmaceuticals, i) for solubilisation of hydrophobic drugs in aqueous media, ii) as components of emulsions ,iii) surfactant self-assembly vehicles for oral and transdermal drug delivery, iv) as plasticizers in semisolid delivery systems, and v) as agents to improve drug absorption and penetration. Non-ionic surfactants such as ethers of fatty alcohols are most commonly used in pharmaceuticals. Cationic surfactants are capable of exerting antibacterial properties by disrupting bacterial cell membranes. In pharmaceutical processing, phospholipid lecithin, bile salts, certain fatty acids and their derivatives have become indispensable since they afford a uniquely effective and efficient mechanism of drug carriage by solubilising the drugs of fatty origin. The antibacterial, antifungal and antiviral activities make biosurfactants relevant molecules for applications in combating many diseases and as therapeutic agents. Biosurfactants have the potential for use as major immunomodulatory molecules, as anti-adhesive biological coating for biomaterials, in vaccines and gene therapy, and they may be incorporated into probiotic preparations to combat urogenetical tract infections and pulmonary immunotherapy. Gemini surfactants are effective potential transfection agents for non-viral gene therapy. Ionic liquids act as secondary surfactants and the use of surfactant/ionic liquid systems should be explored to build specific properties in the organized medium, and to explore pharmaceutical applications of traditional, biosurfactant and Gemini surfactants.

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“…Similar to the growth of the petrochemical industry, the oleochemicals industry has seen tremendous growth in the use of biobased oils as the donor for the hydrophobic moiety in renewable surfactants. In particular, commercially available linear alkyl benzene sulfonate surfactants represent a large proportion of the non-ionic surfactants market, with diverse applications that are currently dominated by petroleumderived products (Kjellin and Johansson, 2010;Pleissner et al, 2014;Laurens et al, 2017). To make a market impact with alternative biobased non-ionic surfactants, it is critical that both the surfactant properties and molecular composition approximate the target application.…”

Section: Introductionmentioning

confidence: 99%

“…The unsaponifiables are usually isolated after a strong alkaline treatment, which saponifies all the fatty-acid-derived lipids, rendering the fatty acids water-soluble, and phytol and sterols can either be purified for further use or used as a mixture with the phytol fraction retained for derivatization of the hydroxyl groups to form amphiphilic, non-ionic surfactants. Surfactants produced from sterols can be utilized in many different commercial products, including cosmetics and soaps (Folmer, 2003;Kjellin and Johansson, 2010;Urbin et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hydrophilic Derivative Surfactants From Algae-Derived Unsaponifiable Lipids

et al. 2022

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In the context of decarbonizing the economy, the utilization of biologically sourced feedstocks to produce replacements for petroleum-derived materials is becoming more urgent. Improving renewable biomass production and utilization is imperative for commercializing future biorefineries. Algae-derived biomass is a particularly promising feedstock thanks to its attractive oil content and composition; specifically, the high-value products in the unsaponifiable lipids have not been included in a conversion process. Here we demonstrate surfactant synthesis from a complex oil fraction as the hydrophobic donor moieties, yielding products that are similar to commercially available surfactants such as the linear alkyl benzene sulfonates. Unsaponifiable lipids extracted from algae were derivatized to non-ionic surfactants using a green chemical synthesis route based on a double esterification with succinic acid and polyethylene glycol. The in-depth molecular and structural surfactant characterization is included and indicates that the resulting properties fall between those of pure cholesterol and phytol used as surrogates for the reaction synthesis demonstration. This is the first demonstration of an effective and potentially high-value synthesis of functional surfactants with properties that can be tailored based on the relative composition of the resulting hydrocarbon alcohol components in the mixture. This novel green chemistry synthesis approach provides a route to high-value product synthesis from algae.

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Surfactants from Renewable Resources

Cited by 91 publications

References 292 publications

How a sticky fluid facilitates prey retention in a carnivorous pitcher plant (Nepenthes rafflesiana)

How a sticky fluid facilitates prey retention in a carnivorous pitcher plant (Nepenthes rafflesiana)

Surfactants: Pharmaceutical and Medicinal Aspects

Synthesis of Hydrophilic Derivative Surfactants From Algae-Derived Unsaponifiable Lipids

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