Wettability of Aqueous Rhamnolipids Solutions Produced by <i>Pseudomonas aeruginosa</i> LBI

Costa, Siddhartha G. V. A. O.; Souza, Sandro R. de; Nitschke, Márcia; Franchetti, Sandra Mara Martins; Jafelicci, Miguel; Lovaglio, Roberta Barros; Contiero, Jonas

doi:10.1007/s11743-008-1102-6

Cited by 14 publications

(12 citation statements)

References 15 publications

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“…The comparison of the wetting profiles showed dynamic changes in the contact angle at low SDS and RL concentrations -the contact angle increased and when the concentration of the surfactant increased further, the contact angle decreased. 59 The results showed that RLs produced by P. aeruginosa LBI exhibited superior wetting abilities compared to SDS. This is the first work that evaluated the wetting properties of RLs on polymer blends.…”

Section: Formulation Of Cleaners and Wetting Agentsmentioning

confidence: 94%

“…59 Determination of the HLB value, which varies between 0 and 20, enables the prediction of the behavior of surface-active compounds: 0-3 antifoaming agents, 4-6 W/O (water/oil) emulsifiers, 7-9 wetting agents, 8-18 O/W (oil/water) emulsifiers, 13-15 typical detergents and 10-18 solubilizers/hydrotropes. The HLB value can only be used as a preliminary guide, and further analysis by more exact and precise analytical techniques is required.…”

Section: Tensioactive Propertiesmentioning

confidence: 99%

“…59,63 Surface tension and contact angle measurements as a function of surfactant concentration are directly related to the difference in the adsorption of surfactants on solid-vapor (S-V) and solid-liquid (S-L) interfaces. Contact angle measurements also aid the elucidation of the nature of interactions between a surfactant molecule and a solid surface.…”

Section: Tensioactive Propertiesmentioning

confidence: 99%

“…59 The properties and efficacy of detergent formulations are critically dependent on the interfacial activity of various surfactants, which are present in their composition. 64 At present, the liquids and powders generally contain alkyl sulfonates, such as linear alkylbenzene sulfonates, but the glycolipid biosurfactants and among them rhamnolipids, produced by P. aeruginosa, are possible candidates to be used for the, at least, partial replacements of these synthetic compounds.…”

Section: Formulation Of Cleaners and Wetting Agentsmentioning

confidence: 99%

“…64 Moreover, on hydrophobic surfaces, the adhesion tension had a specific dynamic, depending on surfactant concentration, while on hydrophilic surfaces a steady decrease in adhesion tension was observed with both surfactant solutions. 64 Costa et al 59 also studied the wetting behavior of RLs produced by P. aeruginosa LBI grown on a waste oil substrate, and the chemical surfactant SDS, on glass, PET, poly(vinyl chloride) (PVC), poly(ε-caprolactone) (PCL) and a polymer blend (PVC-PCL) by measuring the contact angle of sessile drops. The comparison of the wetting profiles showed dynamic changes in the contact angle at low SDS and RL concentrations -the contact angle increased and when the concentration of the surfactant increased further, the contact angle decreased.…”

Section: Formulation Of Cleaners and Wetting Agentsmentioning

confidence: 99%

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Rhamnolipid biosurfactant from Pseudomonas aeruginosa: From discovery to application in contemporary technology

2015

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The rhamnolipids will most likely be the next generation of biosurfactants to reach the market. They should follow closely after alkyl polyglycosides, already established in the biosurfactants market, and sophorolipids, which can be found in several cleaning agents. However, the greatest numbers of recent publications and patents among glycolipid biosurfactants have been dedicated to rhamnolipids. Produced mainly by Pseudomonas aeruginosa, rhamnolipids are mixtures of different rhamnolipid congeners, which show physico-chemical properties that differ from those of single congeners, with the most abundant structure in the mixture having the largest impact on the overall characteristics of the total mixture. Characteristics of biodegradability, low toxicity, production from renewable sources and antimicrobial (particularly antifungal) activity together make rhamnolipid biosurfactants particularly promising for broad commercial application. Although to date, bioremediation has been the major topic filed for patents utilizing rhamnolipids, the increasing number of patents for applications in cosmetics, agronomy and food industries, formulation of cleaners and nanotechnology indicates their future implementation in these fields.

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Section: Formulation Of Cleaners and Wetting Agentsmentioning

confidence: 94%

Section: Tensioactive Propertiesmentioning

confidence: 99%

Section: Tensioactive Propertiesmentioning

confidence: 99%

Section: Formulation Of Cleaners and Wetting Agentsmentioning

confidence: 99%

Section: Formulation Of Cleaners and Wetting Agentsmentioning

confidence: 99%

See 3 more Smart Citations

Rhamnolipid biosurfactant from Pseudomonas aeruginosa: From discovery to application in contemporary technology

2015

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Anti‐fouling performance of polyamide microfiltration membrane modified with surfactants

Maitam

Nicolini

Kronemberger

2022

J of Applied Polymer Sci

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Fouling is the main limitation in membrane separation processes. This phenomenon occurs by the adsorption/deposition of particles, colloids, or biomolecules on the membrane surface and it pores. This process can severely affect membrane performance due to the decrease in permeate flux, lifetime reduction, and selectively and separability changes. Studies have concluded that physicochemical superficial characteristics of membranes is a key for understanding and mitigating fouling. In this study, the surface of a commercial microfiltration membrane (MF) was modified with commercial surfactants and a biosurfactant to reduce fouling and improve its performance. Coated (MF‐SDS, MF‐CTAB, MF‐Tween80, and MF‐Rha) and uncoated membranes were characterized by Fourier‐transform infrared spectroscopy (FT‐IR), contact angle, and zeta potential. Microfiltration tests were performed by using Saccharomyces cerevisiae yeast suspensions as model fouling agent at different transmembrane pressures and feed flow rates. Interfacial analysis indicated that the adsorption of surfactants on the membranes' surface is responsible for significant changes in the membrane's hydrophilicity and superficial charges. Considering filtration of the model suspensions, the permeate flux values were increased for all coated membranes compared to the uncoated one. Long‐term experiments showed a high stability of the rhamnolipid adsorption on the membrane surface, proving its effectiveness in fouling reduction.

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Potential application of Bacillus subtilis SPB1 biosurfactants in laundry detergent formulations: Compatibility study with detergent ingredients and washing performance

Bouassida

Fourati

Ghazala

et al. 2017

Engineering in Life Sciences

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Surfactants play a very important role in laundry and household cleaning products ingredients. In this research, the application of lipopeptide biosurfactants, produced by Bacillus subtilis SPB1, in the formulation of a washing powder was investigated. The SPB1 biosurfactant was mixed with sodium tripolyphosphate as a builder and sodium sulfate as filler. The efficiency of the formulated detergent composition with different washing conditions to remove a stain from cotton fabric was examined. The results showed that the formulated detergent was effective in oil removal, with optimal washing conditions of pH, temperature, striate and time of washing system of 7, 65°C, 1000 RPM and 60 min, respectively. A comparative study of different detergent compositions (biosurfactant-based detergent, combined biosurfactantcommercial detergent, and a commercial detergent) for the removal of oil and tea stains, proved that the bio-scouring was more effective (>75%) in terms of the stain removal than the commercial powders (<60%). Moreover, the results demonstrated that the biosurfactant acts additively with a commercial detergent and enhances their performance from 33 to 45% in removing oil stain and from 57 to 64% in removing tea stain. As a conclusion, in addition to the low toxicity and the high biodegradability of the microbial biosurfactants, the results of this study have shown that the future use of this lipopeptide biosurfactant as laundry detergent additive is highly promising.

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Wettability of Aqueous Rhamnolipids Solutions Produced by Pseudomonas aeruginosa LBI

Cited by 14 publications

References 15 publications

Rhamnolipid biosurfactant from Pseudomonas aeruginosa: From discovery to application in contemporary technology

Rhamnolipid biosurfactant from Pseudomonas aeruginosa: From discovery to application in contemporary technology

Anti‐fouling performance of polyamide microfiltration membrane modified with surfactants

Potential application of Bacillus subtilis SPB1 biosurfactants in laundry detergent formulations: Compatibility study with detergent ingredients and washing performance

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