Journal of Surfactants and Detergents最新文献

{"title":"Adsorption of cationic Gemini surfactants on carbon steel surface and their anticorrosion performance in hydrochloric acid solution","authors":"Lin Liu,&nbsp;Chunxia Wang,&nbsp;Jun Du,&nbsp;Youpeng Zuo,&nbsp;Ligang Zhang,&nbsp;Xiaoxiao Hu,&nbsp;Zhenhua Xu","doi":"10.1002/jsde.12831","DOIUrl":"https://doi.org/10.1002/jsde.12831","url":null,"abstract":"<p>Metal corrosion has hindered the advancement of new technologies. The surfactant as one kind of corrosion inhibitor can effectively restrain metal corrosion in corrosive medium. In this research, two cationic Gemini surfactants, 3,3′-(ethane-1,2-diyl)bis(1-octyl-1<i>H</i>-imidazol-3-ium) dibromide ([C₈im-2-C₈im]Br₂) and 3,3′-(butane-1,4-diyl)bis(1-octyl-1<i>H</i>-imidazol-3-ium) dibromide ([C₈im-4-C₈im]Br₂), have been prepared for the corrosion inhibition of carbon steels in 1.0 mol/L HCl solution. The weight loss measurement demonstrates that two inhibitors both achieve high inhibition efficiencyies at concentration of 0.50 mM for carbon steels in 1.0 mol/L HCl solution. By comparison, the anticorrosion performance of [C₈im-2-C₈im]Br₂ for carbon steel specimens in 1.0 mol/L HCl solution are better than that of [C₈im-4-C₈im]Br₂, and the maximum corrosion efficiency can reach 96.15% at the temperature of 30°C. The determination of adsorption thermodynamics and kinetics parameters reveals that the adsorption behavior of two inhibitors on the steel surface is chemisorption and follows Langmuir isotherm. Good anticorrosion performance of the inhibitor for carbon steel in HCl solution owes to a dense and compact protective film formed onto the steel surface. It indicates that the proposed cationic Gemini surfactants have great prospect in the corrosion inhibition of metals.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 4","pages":"705-717"},"PeriodicalIF":1.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144525158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and application of cardanol ether-based anionic–nonionic surfactant","authors":"Hong Chen,&nbsp;Aijun Hao,&nbsp;Baowei Zhu,&nbsp;Jingyu Zhang,&nbsp;Xiao Wu,&nbsp;Lei Yuan","doi":"10.1002/jsde.12835","DOIUrl":"https://doi.org/10.1002/jsde.12835","url":null,"abstract":"<p>Using cardanol polyoxyethylene ether, maleic anhydride, and sodium bisulfite as main raw materials, a new type of surfactant, sodium dicardanol polyoxyethylene sulfosuccinate anionic–nonionic surfactant was synthesized. The effects of reaction temperature, material ratio, and catalyst dosage on esterification reaction were investigated by single factor and orthogonal experiment method, and the reaction conditions of esterification and sulfonation were optimized. Fourier infrared spectroscopy, liquid chromatography-mass spectrometry and proton nuclear magnetic resonance were employed to determine the target product. The surface tension of obtained sodium dicardanol polyoxyethylene sulfosuccinate <i>γ</i>_CMC was measured as 34.54 mM/m, and critical micelle concentration was 1.61 × 10⁻⁴ mol/L. The surface tension of sodium dicardanol polyoxyethylene sulfosuccinate under different pH and salty environments was further tested, and it was found that sodium dicardanol polyoxyethylene sulfosuccinate showed certain resistance to acid-base and salt conditions. The cleaning agent for aluminum was prepared using sodium dicardanol polyoxyethylene sulfosuccinate, exhibiting promising performance characterized by its non-corrosive and environmentally friendly properties.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 3","pages":"675-686"},"PeriodicalIF":1.6,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Macroscopic thermodynamic properties of ionic micellar solutions depending on physicochemical formulation for the sodium dodecyl sulfate/sodium sulfate/water/n-heptane/1-pentanol system","authors":"Shirley Marfisi-Valladares,&nbsp;Angiemar Correa,&nbsp;Michael Kluchuikon,&nbsp;Alexis Cova-Bonillo,&nbsp;Rayda Patino-Camino,&nbsp;Mario Lobo,&nbsp;José López","doi":"10.1002/jsde.12833","DOIUrl":"https://doi.org/10.1002/jsde.12833","url":null,"abstract":"<p>This work characterized the macroscopic thermodynamic properties of ionic micellar solutions. Formulation-composition studies were done along one dimension by varying the salinity (S) or oil–water ratio (WOR) in mixtures of sodium dodecyl sulfate, sodium sulfate, water, <i>n</i>-heptane, and 1-pentanol at 25°C and 1 atm. Material balance and multiple regression models were used to get the partial, mixed, and excess molar volumes. The UNIFAC local composition model, coupled with Debye–Hückel theory, was employed to calculate activity coefficients and dimensionless Gibbs energies (partial, mixed, and excess). The equilibrium SOW systems exhibited phase transitions (WI-WIII-WII), with micellar solubilization increasing as salinity increased at constant WOR. Solubilization peaked at the optimal formulation, and further increases in WOR enhanced solubilization up to the formation of a single-phase system. Deviations from ideal behavior, in the thermodynamic properties between aqueous and oil micellar solutions, were mainly due to chemical interaction of solutes (<span></span><math>\u0000 <mrow>\u0000 <mi>γ</mi>\u0000 <mo>≠</mo>\u0000 <mn>1</mn>\u0000 <mo></mo>\u0000 </mrow></math>) respect to solvents (<span></span><math>\u0000 <mrow>\u0000 <mi>γ</mi>\u0000 <mo>→</mo>\u0000 <mn>1</mn>\u0000 <mo></mo>\u0000 </mrow></math>). Negative values of the Gibbs energy of mixing confirmed the stability of the liquid phases and their extension to the liquid–liquid equilibrium. The response surfaces V = f(WOR, S) and G^E/RT = f(WOR, S) represent the macroscopic thermodynamic behavior of micellar solutions as a function of physicochemical formulation. These results can be extended to other colloidal systems for the design of formulations with surfactants and anionic salts, oriented to the diagnosis and resolution of problems in real systems, both at laboratory and industrial level.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 4","pages":"689-704"},"PeriodicalIF":1.6,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Managing a chronic skin ailment with non-ionic surfactant based micro-emulgel loaded with bio-actives: Formulation, characterization and biological evaluation","authors":"Khushbu Vyas,&nbsp;Madhuri Channawar,&nbsp;Jayshree Dalal,&nbsp;Anil Chandewar,&nbsp;Prasad Jumade","doi":"10.1002/jsde.12829","DOIUrl":"https://doi.org/10.1002/jsde.12829","url":null,"abstract":"<p>In a global report on psoriasis, World Health Organization stated that, a significant portion of the global population suffers from psoriasis, a chronic, non-contagious autoimmune, inflammatory skin disorder mediated by T cells with unpredictable relapse. Overall, there is ample evidence to suggest that the treatment of psoriasis with synthetic agents is associated with ample of systemic long term side effects. The present study aims at the use of novel nanosized carriers for plant bio-actives to significantly enhance the pharmacokinetic and pharmacodynamic properties of plant actives and avoid side-effects of synthetic agents. In present study, we have created Quercetin and Ferulic acid loaded micro-emulsion formulations using, oleic acid, Polysorbate 80 and propylene glycol as the oil, surfactant, and co-surfactant, respectively. To make topical psoriasis treatment easier, various batches of microemulsions with surfactant: cosurfactant compositions ranging from 31%w/w to 34%w/w were prepared and embedded in a hydrogel system containing gelling agents like sodium alginate and carbapol 940. Numerous parameters, including viscosity, spreadability, globule size, zeta potential, polydispersibility index, refractive index, percent transmittance, conductivity test, etc., were assessed for these developed microemulsions and micro-emulgels (microemulsion loaded hydrogels). The created formulations were found pharmaceutically satisfactory and known to possess good antibacterial activity against <i>Staphylococcus aureus,</i> the most commonly known pathogen which can be the possible agent to exaggerate the psoriatic symptoms.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 3","pages":"663-673"},"PeriodicalIF":1.6,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sodium nonylcyclohexanol ethoxylate sulfate-based strategy for remediating dye-contaminated soil with low surfactant adsorption","authors":"Xueyi Hu,&nbsp;Yongjin Zhang,&nbsp;Fei Qian,&nbsp;Jianyi Liu,&nbsp;Guiju Zhang,&nbsp;Yongmei Xia","doi":"10.1002/jsde.12822","DOIUrl":"https://doi.org/10.1002/jsde.12822","url":null,"abstract":"<p>Surfactant-assisted soil cleaning has been considered as a promising technology for remediating of dye-contaminated soil, but is significantly impeded by limitations such as the adsorption or precipitation of surfactants in soil. To take the advantage of effective remediation of anionic surfactant and lower adsorption of nonionic surfactant, a remediation system has been developed in this study for soil contaminated with model dyes methyl orange and alizarin red, employing a designed anionic-nonionic surfactant known as sodium nonylcyclohexanol ethoxylates sulfate (NCEO₅S) and a commercial surfactant—sodium alkyl alcohol ethoxylate sulfate (AES). Using simple wash, the elution efficiency on highly-contaminated soil (methyl orange and alizarin red) reached up to 94.34% and 97.66%, respectively, at 25°C in 24 h with 1 wt% of surfactant solution. Electrostatic repulsion noticeably mitigates surfactant adsorption on the soil surface. The low adsorption of surfactants on the eluted soil surface was characterized with SEM-EDS and thermogravimetric analysis. The kinetics of surfactant-enhanced dyes desorption from contaminated soil follow the Elovich equation. The findings will be benefit for developing eco-friendly surfactant systems to clean-up dyes-contaminated soils while minimizing surfactant adsorption.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 3","pages":"651-662"},"PeriodicalIF":1.6,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulation of cationic surfactant micellization by imidazolium-based ionic liquids: A thermodynamic study","authors":"Álvaro Javier Patiño-Agudelo,&nbsp;Gabriel Max Dias Ferreira,&nbsp;Guilherme Max Dias Ferreira,&nbsp;Yara Luiza Coelho,&nbsp;Isabela A. Marques,&nbsp;Pedro dos Santos Moreau,&nbsp;Ruben Ramallo Ribera,&nbsp;Ana Clarissa dos Santos Pires,&nbsp;Luis Henrique Mendes da Silva","doi":"10.1002/jsde.12823","DOIUrl":"https://doi.org/10.1002/jsde.12823","url":null,"abstract":"&lt;p&gt;Understanding the modulation of ionic surfactant properties in the presence of ionic liquids (ILs) is fundamental for expanding the application of that class of compounds. Although the effect of ILs on the micellization process of anionic surfactant has gained broad attention, its effect on cationic surfactants aggregation processes has been underexplored. This work investigated the effect of 1-alkyl-3-methylimidazolium chlorides (C&lt;sub&gt;n&lt;/sub&gt;mimCl, with &lt;i&gt;n&lt;/i&gt; = 2 or 4) and NaCl on the micellization of alkylpyridinium chlorides (C&lt;sub&gt;n&lt;/sub&gt;PyCl, with &lt;i&gt;n&lt;/i&gt; = 12 or 16) cationic surfactants using Isothermal Titration Calorimetry (ITC) and electrical conductivity. The reduction in the critical micellar concentration (CMC) in the presence of the electrolytes depends similarly on the stoichiometry between the surfactant and the electrolyte in the solution before micellization, independent of the electrolyte nature. However, the more hydrophobic the ionic liquid and the surfactant, the more intense the effects of electrolyte concentration on the micellar dissociation degree (α) and the micellization parameters (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msubsup&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;∆&lt;/mo&gt;\u0000 &lt;mi&gt;G&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mi&gt;mic&lt;/mi&gt;\u0000 &lt;mi&gt;o&lt;/mi&gt;\u0000 &lt;/msubsup&gt;\u0000 &lt;mo&gt;,&lt;/mo&gt;\u0000 &lt;msubsup&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;∆&lt;/mo&gt;\u0000 &lt;mi&gt;H&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mi&gt;mic&lt;/mi&gt;\u0000 &lt;mi&gt;o&lt;/mi&gt;\u0000 &lt;/msubsup&gt;\u0000 &lt;/mrow&gt;&lt;/math&gt;, and &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msubsup&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;T&lt;/mi&gt;\u0000 &lt;mo&gt;∆&lt;/mo&gt;\u0000 &lt;mi&gt;S&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mi&gt;mic&lt;/mi&gt;\u0000 &lt;mi&gt;o&lt;/mi&gt;\u0000 &lt;/msubsup&gt;\u0000 &lt;/mrow&gt;&lt;/math&gt;). The presence of C&lt;sub&gt;2&lt;/sub&gt;mimCl or C&lt;sub&gt;4&lt;/sub&gt;mimCl made the micellization process of both surfactants more exothermic, associated mainly with the maximization of non-dispersive interactions among monomers within the micelles and reduction of repulsive electrostatic interactions among surfactant head groups. Additionally, kosmotropic effects and preferential solvation of the surfactant, more intense for C&lt;sub&gt;4&lt;/sub&gt;mimCl, actuate at high concentrations of this ionic liquid, intensifying the decrease of &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msubsup&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;∆&lt;/mo&gt;\u0000 &lt;mi&gt;H&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mi&gt;mic&lt;/mi&gt;\u0000 &lt;mi&gt;o&lt;/mi&gt;\u0000 &lt;/msubsup&gt;\u0000 &lt;/mrow&gt;&lt;/math&gt;. This underscores that, despite both the imidazolium cation and the surfactant being positively charged, dispersive interactions between them play an important role in efficiently modu","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 3","pages":"639-650"},"PeriodicalIF":1.6,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Glucose-induced self-assembly in structurally diverse polyoxyethylene based nonionic surfactants for enhanced anticancer drug solubilization","authors":"Ketan Kuperkar,&nbsp;Virendra Prajapati,&nbsp;Gerrard Marangoni,&nbsp;Pratap Bahadur","doi":"10.1002/jsde.12826","DOIUrl":"https://doi.org/10.1002/jsde.12826","url":null,"abstract":"<p>This study investigates the influence of glucose in inducing the micellar growth/transition in several structurally diverse, longer, and shorter chain polyoxyethylene (POE)-based nonionic surfactants, commercially known as Kolliphor® HS15 (Solutol), Kolliphor EL®, Akypo®, Brij®-78, Pluronic® (P103 and F77), Tetronic® (T1304), and Tyloxapol® in aqueous solution environment. It was observed that the addition of glucose induces dehydration of the POE moieties or chains in the tested systems, thereby enhancing the inter-micellar interactions via hydrogen bonding in the hydrophilic part of the selected surfactants. This dehydration leads to an interesting clouding behavior across all the studied surfactant systems. Also, the dynamic light scattering (DLS) technique accounted for the probable self-assembly and micellar growth in water and 1 M glucose (<i>fix</i>) across various temperatures. Being pharmaceutical excipients, these micellar entities were successfully employed to assay the hydrophobic anticancer drug curcumin (Cur) solubilized, as confirmed by the peak intensity variation from UV–visible spectroscopy. Cur solubilization into glucose-containing micelles revealed enhanced solubility expressed in terms of drug loading efficiency (DL%), encapsulation efficiency (EE%), partition coefficient (log P), and standard free energy of solubilization (Δ<i>G</i>°), which is due to the glucose-induced hydrophobicity in the examined nonionic micellar systems.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 3","pages":"613-625"},"PeriodicalIF":1.6,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rheology as a tool for identifying and characterizing optimal microemulsions formulations","authors":"Guillaume Lemahieu,&nbsp;Jesús F. Ontiveros,&nbsp;Valérie Molinier,&nbsp;Jean-Marie Aubry","doi":"10.1002/jsde.12827","DOIUrl":"https://doi.org/10.1002/jsde.12827","url":null,"abstract":"<p>This study investigates the use of rheology to detect phase inversion in surfactant–oil–water (SOW) systems, offering a rapid method for identifying “optimal formulations.” Phase inversion through temperature or salinity variation provides a faster alternative compared with equilibrium scans. Using well-defined polyethoxylated surfactants (C₈EO₃, C₁₀EO₄, C₁₂EO₅), phase inversion was monitored through viscosity measurements at a constant shear rate, with temperature as formulation variable. Emulsion viscosity reaches a minimum at the phase inversion point, which corresponds to an ultra-low interfacial tension condition. A strong correlation between the reported fish-tail temperature (<i>T</i>*) and the phase inversion temperature (PIT) was observed. While identifying optimal conditions through a formulation scan in a series of test tubes is relatively quick, evaluating the surfactant system's ability to reduce interfacial tension can take several weeks due to the requirement of equilibrium. Formulation conditions at which minimal emulsion viscosity occurs are related to those where three-phase systems are obtained, with the magnitude of interfacial tension inversely proportional to this value. An empirical approach linking the emulsion destabilization zone with the interfacial tensions is proposed. By measuring this interval, it is possible to roughly predict interfacial tension for model systems.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 3","pages":"627-638"},"PeriodicalIF":1.6,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jsde.12827","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harmonizing rhamnolipid biosurfactant production by halophilic Pseudomonas aeruginosa Pa84 by applying response surface methodology","authors":"Priyanka Sharma,&nbsp;Shantam Gautam,&nbsp;Siddhi Joshi,&nbsp;Mousumi Debnath","doi":"10.1002/jsde.12825","DOIUrl":"https://doi.org/10.1002/jsde.12825","url":null,"abstract":"<p>Biosurfactants are gaining attention due to their biobased nature, including reduced toxicity and enhanced biocompatibility. This research work investigates the characteristics of the biosurfactant extracted from the halophilic strain Pa84 of <i>Pseudomonas aeruginosa</i> and optimizes its production using a statistical model. The identity of biosurfactant from <i>P. aeruginosa</i> strain Pa84 as rhamnolipid was determined by comparing the genomic sequences of strain Pa84 with high-yielding strains of <i>P. aeruginosa</i> that produce rhamnolipid, through Fourier transform infrared and liquid chromatography-mass spectrometer analyses, and by the presence of <i>rhlA</i>, <i>rhlB</i>, and <i>rhlC</i> genes in the genome of strain Pa84 that are responsible for the production of rhamnolipid. A methodical strategy using a time-course assessment and statistical software optimized the production of rhamnolipids. After optimization using central composite design-response surface methodology, the medium composition of 3.34 g/L of NH₄Cl, 1.03 g/L of NaCl, and 4 g/L of glycerol were chosen, yielding 7.48 ± 0.0217 g/L of biosurfactant. These findings will help in the development of effective and sustainable bioprocess that produce rhamnolipid biosurfactants, for use in a variety of sectors.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 3","pages":"599-612"},"PeriodicalIF":1.6,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructure of sulfosuccinates based microemulsions","authors":"Giuseppe Tartaro,&nbsp;Davide Schirone,&nbsp;Luigi Gentile,&nbsp;Gerardo Palazzo","doi":"10.1002/jsde.12828","DOIUrl":"https://doi.org/10.1002/jsde.12828","url":null,"abstract":"<p>The system made by water, isooctane and a blend of Sodium dioctyl sulfosuccinate (AOT) with its more hydrophilic homologue sodium dihexyl sulfosuccinate (SDHS) can give raise to Winsor I, III and II equilibria at room temperature by slight changes in salinity. The phase transitions have been tracked using diffusion NMR, and solubilized volume fractions while small-angle X-ray scattering (SAXS) provided insight into the characteristic lengths (ξ) within the microemulsions' structures. Our findings reveal a peculiar linear correlation between the reciprocal of these characteristic lengths (ξ⁻¹) and the HLD values. For HLD &lt;0, ξ⁻¹ decreases linearly with HLD with a slope = −0.0056 Å⁻¹ but just above HLD = 0 the slope reverses (+0.0056 Å⁻¹) and ξ⁻¹ increases linearly with HLD demonstrating that the HLD reflects the direction of interfacial curvature. However, at the optimal composition where the curvature is null and HLD = 0, the linear trends observed for ξ⁻¹ below and above HLD = 0 converge at a ξ⁻¹ value that is significantly greater than 0. This indicates that HLD is a measure of the interface/volume ratio and not of the interface curvature. This work aims to deepen the understanding of the relationship between the semi-empirical HLD equation and the spontaneous curvature of microemulsions.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 3","pages":"587-598"},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jsde.12828","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}