Journal of Surfactants and Detergents最新文献

{"title":"The study of micellar transitions in mixed systems of dibranched cationic/nonionic fluorinated surfactants using various physicochemical methods","authors":"Amina Sardi,&nbsp;Khadidja Kradra Brahma,&nbsp;Souad Bennabi,&nbsp;Soumia Abdelkrim","doi":"10.1002/jsde.12813","DOIUrl":"https://doi.org/10.1002/jsde.12813","url":null,"abstract":"<p>In this study, a new method was introduced to induce micellar transitions by using vesicles formed from mixed surfactants, which offer enhanced stability. Different physicochemical analysis methods were used to study the transition mechanism and the aggregation behavior of the mixed aqueous system composed of the double-chain cationic didodecyldimethylammonium bromide (DDAB) and a single-chain nonionic fluorinated surfactant undecafluoro n-pentyl decaoxyethylene ether (C₅F₁₁(EO)₁₀), by varying the fraction of DDAB, then the total surfactant concentration of DDAB/C₅F₁₁(EO)₁₀ mixed system at X_DDAB = 0.9. The obtained results indicated that the addition of the fluorinated surfactant C₅F₁₁(EO)₁₀ to the mixed system resulted in a reduction of the surface tension (<i>γ</i>) and a decrease in the Electrical conductivity (K). Furthermore, even at high total concentrations of the mixed system, the conductivity and charge density at the surface remained stable. As X_DDAB values increased, a higher degree of dissociation (α) was observed, along with negative values in the thermodynamic parameters of micellization (Δ<span></span><math>\u0000 <mrow>\u0000 <msubsup>\u0000 <mi>G</mi>\u0000 <mi>CMC</mi>\u0000 <mo>°</mo>\u0000 </msubsup>\u0000 </mrow></math>, Δ<span></span><math>\u0000 <mrow>\u0000 <msubsup>\u0000 <mi>G</mi>\u0000 <mi>CVC</mi>\u0000 <mo>°</mo>\u0000 </msubsup>\u0000 </mrow></math>, and Δ<span></span><math>\u0000 <mrow>\u0000 <msubsup>\u0000 <mi>G</mi>\u0000 <mi>ads</mi>\u0000 <mo>°</mo>\u0000 </msubsup>\u0000 </mrow></math>), confirming the transition from micelles to vesicles. The dynamic light scattering (DLS) analysis revealed the formation of two stable types of aggregates at both low and high concentrations, as supported by the zeta potential (ζ). Upon increasing the concentration of surfactants, UV–Vis absorption measurements indicated that small spherical micelles grow into large multilamellar vesicles, as evidenced by an increase in turbidity and confirmed transmission electron microscopy images.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 1","pages":"201-212"},"PeriodicalIF":1.6,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121176","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":"Special issue: Industrial surfactants R&D—A tribute to George A. Smith","authors":"Gregory P. Dado PhD,&nbsp;Nancy A. Falk PhD,&nbsp;Aslin Izmitli PhD,&nbsp;Thu Landry PhD,&nbsp;Philip K. Vinson PhD","doi":"10.1002/jsde.12812","DOIUrl":"https://doi.org/10.1002/jsde.12812","url":null,"abstract":"","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"27 6","pages":"835-836"},"PeriodicalIF":1.6,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642048","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":"Investigation of the detergency properties of mixtures of biocides and nonionic surfactants using a new simplified hard surface cleaning method","authors":"Veronika Yavrukova,&nbsp;Emma Cooban,&nbsp;Isabel Blanco,&nbsp;Elias Pambou,&nbsp;Krastanka Marinova,&nbsp;Jordan Petkov","doi":"10.1002/jsde.12811","DOIUrl":"https://doi.org/10.1002/jsde.12811","url":null,"abstract":"<p>The present study explores the cleaning efficacy of a set of nonionic surfactants (linear ethoxylated alcohol, secondary ethoxylated alcohols with 5, 7, and 9 ethoxy groups, glycoside surfactants, polyglycerol surfactants, and an ethoxylated sorbitan monolaurate) combined with cationic biocides—alkyl quaternary ammonium salts. A simple hard surface cleaning methodology was applied, which was shown to discriminate well between poor and good cleaning formulations. In addition to cleaning efficacy, surface aesthetics such as gloss and haze were evaluated together to assess surface streaking caused by a residual surfactant layer. The haziness determination turned out to be the key feature revealing the complex cleaning performance of multi-component products.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 2","pages":"389-397"},"PeriodicalIF":1.6,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143565381","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":"Effect of droplet charge density on stabilization of oil-in-dispersion emulsions co-stabilized by binary mixed surfactants and nanoparticles","authors":"Wanqing Zhang,&nbsp;Jianzhong Jiang,&nbsp;Zhenggang Cui","doi":"10.1002/jsde.12810","DOIUrl":"https://doi.org/10.1002/jsde.12810","url":null,"abstract":"<p>Ionic surfactant and similarly charged nanoparticles can co-stabilize oil-in-dispersion (OID) emulsions at extremely low concentrations (0.001 cmc/0.001 wt%), in which particles do not adsorb at the oil/water interface but distribute in the aqueous phase forming a dispersion. In this paper, the effect of droplet charge density on stabilization of the <i>n</i>-decane-in-water OID emulsion was examined by using a cetyl trimethyl ammonium bromide (CTAB)/C₁₂B (dodecyl dimethyl carboxyl betaine) binary mixture at a low fixed total concentration (0.01 mM) with varying molar fractions of CTAB. A model based on the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory is proposed to calculate interaction energies between droplets and between droplets and particles. It is found that the droplet charge density can be well compensated by particle concentration along the stabilization boundary, and the OID emulsion still follows the DLVO stabilization. Particles tend to surround droplets at large distances but may form a monolayer between approaching droplets at shorter distances, which significantly reduces the van der Waals attraction between droplets. In addition, the induced auxiliary droplet–particle repulsion is proportional to the number of particles per unit area of droplet surfaces, which together with the droplet–droplet repulsion ensures a large total repulsion preventing droplets from flocculation and coalescence. This work explains quantitatively the stabilization of OID emulsions, which have potential applications in emulsion products such as foods, cosmetics, pesticides, and various industrial emulsion systems. Moreover, the development of the OID emulsions represents an important advancement in green chemistry as it substantially reduces the required amounts of emulsifiers and their environmental impact after use.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 2","pages":"373-387"},"PeriodicalIF":1.6,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143565303","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 performance evaluation of CNF-enhanced polyether-modified polysiloxane defoamer","authors":"Yifei Gao,&nbsp;Jian Wang,&nbsp;Dehua Xu,&nbsp;Yuxuan Lin,&nbsp;Wenbao Song,&nbsp;Yubo Wang,&nbsp;Fei Xu,&nbsp;Gang Chen","doi":"10.1002/jsde.12808","DOIUrl":"https://doi.org/10.1002/jsde.12808","url":null,"abstract":"<p>In this article, polyether-modified polysiloxanes were synthesized by the reaction of poly(methyl hydrogen siloxane) (PMHS) with Allyl alcohol polyether B-400. FT-IR, laser particle size analysis, hydrophilic–lipophilic balance (HLB) value test, and surface tension measurements were used to characterize its structures and properties. The results show that the control law for the HLB value of polyether-modified polysiloxanes was obtained as follow: the HLB value increases with increasing hydrogen content of PMHS. When the polyether-modified polysiloxanes were used to emulsify the polysiloxane, at the HLB value of 10.5, the average particle size of the emulsion was about 0.23 μm with a narrow particle size distribution. The emulsion has good emulsifying and dispersing properties, as well as excellent foam elimination and foam inhibition performance. When the cellulose nanofibrils (CNF) was used as a protective agent for the preparing of the polysiloxane defoamer, the stability of the emulsion does not affect, but its foam elimination and foam inhibition of emulsion can be further improved at the presence of CNF. The lowest surface tension of CNF-enhanced polyether-modified polysiloxane defoamer is about 22.4 mN m⁻¹, which has good surface property. When the concentration of CNF-enhanced polyether-modified polysiloxane defoamer was 0.1 g L⁻¹, the foam elimination time and foam inhibition time were 5.8 s and 38 min, respectively, at the temperature (80°C) and alkali environment (pH 13).</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 2","pages":"363-372"},"PeriodicalIF":1.6,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143565249","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":"Lamellar liquid crystals in commercial polyether-modified polydimetilsiloxanes for coating applications: Structure, rheology and cross-linking","authors":"Fatemeh Soleimani Rokni,&nbsp;Susana Vilchez,&nbsp;Carlos Rodríguez-Abreu","doi":"10.1002/jsde.12802","DOIUrl":"https://doi.org/10.1002/jsde.12802","url":null,"abstract":"<p>We have constructed the phase diagrams in water of two commercial additives for coatings consisting of polyether-modified polydimethylsiloxanes. These aqueous systems form a liquid crystal mesophase (LC) at copolymer concentrations higher than 60 wt%. At low copolymer concentrations, this LC coexists with a diluted aqueous phase. Small angle x-ray scattering (SAXS) measurements and polarized optical microscope observations indicate that the structure of the mesophase is lamellar, with an interlayer spacing that increases linearly with the concentration of water in the system. The lamellar liquid crystals display temperature-dependent viscoelastic behavior, with the copolymer with longer spacing showing a much lower elastic modulus. Since one of the copolymer has terminal acryl groups, its lamellar phase can be crosslinked to produce gelled liquid crystals. Other cross-linked self-assembled structures, such as bicontinuous microemulsions, are envisaged.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 2","pages":"355-362"},"PeriodicalIF":1.6,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jsde.12802","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143565248","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":"Study on the composition and removal effect of human odor on moisture-wicking fabric during home laundry","authors":"Hui Chen,&nbsp;Liujun Pei,&nbsp;Wenhua Shi,&nbsp;Siping Gong,&nbsp;Xiaomin Gu,&nbsp;Hongjuan Zhang,&nbsp;Qun Yang,&nbsp;Gang Sun,&nbsp;Jiping Wang","doi":"10.1002/jsde.12805","DOIUrl":"https://doi.org/10.1002/jsde.12805","url":null,"abstract":"<p>Armpit odors of different individuals were qualitatively and quantitatively collected and analyzed by gas chromatography–mass spectrometry (GC–MS). The results showed that human armpit odor contained 27 substances, including acids, ketones, alcohols, alkanes, and two noticeable odorants of n-nonaldehyde and dodecanol. A headspace solid-phase microextraction/gas chromatography–mass spectrometry method determined that both n-nonaldehyde and dodecanol with distinct characteristic peaks were common chemicals found in the body odors with detection limits at 46.88 and 17.50 ng/L, respectively. The limits of quantitation of both were 156.25 and 59.33 ng/L with relative standard deviation (RSD) less than 5%, and recoveries ranged from 85% to 115%, respectively. The removal of body odor on a moisture-wicking polyester fabric was quantified through by placement, washing, and deodorant finishing methods. The placement method needs at least 2 days for removing the majority of the odor. Sports washing liquid was the best detergent to remove odors with a removal rate of 76.44% for n-nonaldehyde and 87.88% for dodecanol. Deodorant finishing is a convenient and efficient method for removing odors with masking effect of added fragrance. The deodorants were able to remove over 85% of n-nonaldehyde and 75% of dodecanol after drying, indicating that deodorant treatment is an effective method for removing odorous substances. This successful approach in eliminating human odors could offer valuable insights for the advancement of sportswear and hygiene textiles.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 2","pages":"345-354"},"PeriodicalIF":1.6,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143565279","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":"Effect of emulsification step on calcium carbonate encapsulated eicosane and incorporation into geopolymer","authors":"Y. Boland,&nbsp;G. Fontaine,&nbsp;S. Bourbigot,&nbsp;C. Pierlot","doi":"10.1002/jsde.12803","DOIUrl":"https://doi.org/10.1002/jsde.12803","url":null,"abstract":"<p>The effect of the emulsification process of the organic n-eicosane as a phase change material (PCM) in an aqueous solution of sodium dodecyl sulfate (SDBS) as a surfactant has been studied regarding the properties of the CaCO₃ microcapsules. Such microcapsules aim to limit interactions between the PCM and the matrix (i.e., leakage and unwanted reactions). Optical and scanning electron microscopy (SEM) shows that the mean size of the n-eicosane capsule is of the order of 5 μm. However, large non-spherical objects which could be clusters of flocculated capsules or the results of encapsulation of coalescing n-eicosane droplets, are observed, particularly when mechanical stirring (MS) is used rather than when an ultra-turrax (UT) or sonotrode (S) is used in the initial emulsification step. These large, partially encapsulated objects could be the cause of the poor results in leakage tests. It is possible to encapsulate n-eicosane inside a calcium carbonate shell, with a greater than 50% encapsulation ratio. The yield of encapsulated n-eicosane measured by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) is similar and shows that 55% n-eicosane core in CaCO₃ shell can be produced. Up to 33 wt.% CaCO₃ microcapsules (with 55% n-eicosane content) have been successfully incorporated into fresh geopolymer paste. This incorporation of 18% (55% × 33%) of PCM does not modify the hardening conditions of the geopolymer since demolding was possible after 2 days at room temperature. DSC curves confirm that the melting reaction with n-eicosane is conserved inside the hardened geopolymer.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 2","pages":"333-343"},"PeriodicalIF":1.6,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jsde.12803","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143565182","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":"Properties of liquid foams stabilized by sugar-based surfactants and prepared under different conditions","authors":"João Victor Cordeiro do Nascimento,&nbsp;Eduardo R. A. Lima,&nbsp;Natalie Preisig,&nbsp;Cosima Stubenrauch","doi":"10.1002/jsde.12800","DOIUrl":"https://doi.org/10.1002/jsde.12800","url":null,"abstract":"<p>The study of foam stability is a subject of continuous research, due to the different fields of application foams are used in. In this study, foams stabilized with a family of nonionic sugar-based surfactants were investigated systematically. For this purpose, we changed the concentration (c &gt; cmc), the gas flow rate, and the disk porosity. The foam properties were evaluated by measuring the foam volume, the liquid fraction, and the bubble size distribution as a function of time. We observed good foamability for all conditions tested with a tendency towards increasing stability with increasing chain length and increasing head group size. For foams stabilized by the short chain surfactants β-C₈G₁ and β-C₈G₂ we observed a significant time evolution due to coarsening and coalescence, while foams stabilized with the longer chain surfactants hardly changed during the observation time. From an industrial point of view, our study helps to understand properties of foams generated under different conditions. We conclude that for the special family investigated here a very good performance can be expected for a broad variety of conditions.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 2","pages":"321-331"},"PeriodicalIF":1.6,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jsde.12800","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143565181","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":"Application of surfactants for the resolution of emulsions and suspensions in slop oil storage tanks, cleaning, and final disposal","authors":"José López,&nbsp;Shirley Marfisi Valladares,&nbsp;Mario Lobo,&nbsp;Alix Guerrero,&nbsp;Carlos Carvajal","doi":"10.1002/jsde.12799","DOIUrl":"https://doi.org/10.1002/jsde.12799","url":null,"abstract":"<p>In order to provide environmental solutions for the treatment of oily residues (slop oil) from refineries, formulations with surfactants were proposed according to the type of dispersed system of the slop (crude oil emulsified with water and/or solid particles). Samples were collected in 12 tanks located at the Oxialquilados Venezolanos C.A., Barcelona Plant (Anzoátegui, Venezuela), performing physicochemical tests for the identification of the dispersed system (solubility, wettability, stability, water content) and microscopic observations (morphology and particle size). The results indicated heterogeneous slop samples with a water content of 2%–60% vol/vol consisting of single or multiple emulsions, with droplet sizes between approximately 10 and 30 micron; others formed by sludge or suspension (solids/oil/water). For the destabilization of these systems, aqueous and organic cleaning solutions were designed, determining the percentage of oil separated in the bottle tests at optimal and simulated field conditions. Field tests with volume scaling of the slop tank reported efficiencies of 63%, 85%, and 100% when treating the slop TK-17, TK-36, EE, respectively; for the mixture (Pulmon-2) an efficiency of 47%. By combining heat treatment and two demulsifiers was possible to treat the slop TK-17 (multiple emulsion). A considerable volume of water can be drained from the tanks for use in the plant. In conclusion, the surfactant formulas were effective in the recovery of a significant amount of crude oil, making it feasible to return it to the generating entity.</p>","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":"28 2","pages":"305-319"},"PeriodicalIF":1.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143564861","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}