Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献

{"title":"Oligochitosan stabilized silver nanodispersions as a promising basis for SERS substrates","authors":"Ekaterina K. Urodkova ,&nbsp;Ol’ga Ya. Uryupina ,&nbsp;Alexey A. Averin ,&nbsp;Elena S. Zhavoronok ,&nbsp;Ivan N. Senchikhin","doi":"10.1016/j.colsurfa.2025.136786","DOIUrl":"10.1016/j.colsurfa.2025.136786","url":null,"abstract":"<div><div>New nanodispersions of silver particles stabilized by oligomeric chitosans have been synthesized. The synthesis was controlled by electronic absorption spectroscopy and the particle size (from 30 to 90 nm) was measured by dynamic light scattering. The formation of ring-shaped deposits on glass slides from these dispersions was studied. It was proposed to use the obtained nanodispersions and ring-shaped deposits based on them as substrates for Raman spectroscopy. A specific modification of the synthesis protocol of the nanodispersions was carried out in order to obtain larger nanoparticles (90 nm) with a small thickness (2–5 nm) of the oligochitosan shell, which does not limit the measurement of the signal of small amounts of analytes. It is shown that SERS substrates based on modified nanodispersions allow obtaining a well resolved Raman spectrum of an analyte (Rhodamine 6 G) deposited on the substrate at a low concentration (10⁻⁸ M). Thus, the developed solid SERS substrates can be used for the analysis of trace amounts of chemicals in analytical applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"717 ","pages":"Article 136786"},"PeriodicalIF":4.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interfacial competitive behavior of water/oil/surfactant systems in ultra-deep tight reservoir – Insights from dissipative particle dynamics","authors":"Shun Liu ,&nbsp;Ying Qiu ,&nbsp;Jianbin Liu ,&nbsp;Xin Chen ,&nbsp;Long He ,&nbsp;Yao Wang ,&nbsp;Xin Li ,&nbsp;Luyao Chao ,&nbsp;Bing Yang ,&nbsp;Tao Liu","doi":"10.1016/j.colsurfa.2025.136766","DOIUrl":"10.1016/j.colsurfa.2025.136766","url":null,"abstract":"<div><div>The high-temperature and high-pressure characteristics of ultra-deep reservoirs pose significant challenges to studying their efficient development mechanisms, and conventional experimental research struggles to unravel the complex interaction mechanisms between oil, water, and chemicals at the molecular and interfacial levels. To address this, Dissipative particle dynamics (DPD) simulations were employed to delve into oil/water interfacial adsorption behaviors and influencing factors of ultra-deep tight reservoir. Initially, the interfacial dynamics, adsorption characteristics of crude oil components, and interfacial properties were studied. Further, the competitive adsorption dynamics at interface of surfactants and active crude oil components were analyzed. This comprehensive analysis encompasses interfacial dynamics, competitive adsorption characteristics, and interfacial properties, shedding light on the factors modulating these properties. In oil-water systems, resin and asphaltene migrate towards the interface under the influence of hydrogen bonding and heteroatoms, forming a stable interfacial film. The interfacial activity of crude oil components follows a specific order: asphaltene &gt; resin &gt; aromatic &gt; saturated. As temperature increase, molecular thermal motion intensifies, extending interfacial stability time but also enhancing adsorption capacity of resin and asphaltene. This results in increased adsorption density, expanded interface thickness, and reduced Interfacial Tension (IFT). Moreover, this study finds that increasing the oil-water ratio prolongs the time to interfacial stability, yet IFT remains stable. In contrast to crude oil components, surfactants preferentially occupy the oil-water interface. However, resin and asphaltene also demonstrate a degree of competitive adsorption. As surfactant concentration increases, adsorption density rises, leading to decreased IFT. Upon reaching adsorption saturation, the interface undergoes structural changes to accommodate additional adsorption sites. Elevated temperatures further intensify molecular thermal motion, amplifying competitive interfacial adsorption and extending interfacial stability. Conversely, decreasing the oil-water ratio enhances the proportion of surfactant molecules at interface, resulting in reduced interfacial stability time and IFT.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"717 ","pages":"Article 136766"},"PeriodicalIF":4.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innovative bio-based bamboo adhesive: Performance breakthrough through the host-guest interaction of cyclodextrin and adamantane","authors":"Weibing Xue ,&nbsp;Rui Zhao ,&nbsp;Tongda Liu ,&nbsp;Xin Ran ,&nbsp;Rong Liu ,&nbsp;Tonghua Lu ,&nbsp;Renzhong Wei ,&nbsp;Guanben Du ,&nbsp;Jun Li ,&nbsp;Long Yang","doi":"10.1016/j.colsurfa.2025.136765","DOIUrl":"10.1016/j.colsurfa.2025.136765","url":null,"abstract":"<div><div>Recently, the use of agricultural, forestry, and fishery residues and wastes to develop green and environmentally friendly bio-based adhesives has gradually become the industry development trend and is an effective technical path to implement energy saving, environmental protection, and achieve sustainable development. The present work cleverly leverages the unique advantages of bio-based chitosan and 1-adamantane carboxylic acid to develop an innovative adamantane-chitosan bamboo adhesive through an amidation reaction. Meanwhile, sulfhydryl-functionalized cyclodextrins were prepared, and the cyclodextrin host molecules were successfully anchored to the bamboo surface through bridging 3-mercaptopropyltrimethoxysilane. During the bonding process, the adamantane guest molecules on the adhesive and the cyclodextrin host molecules on the bamboo surface were subject-guest recognized, resulting in the construction of a host-guest chemical bonding interface to achieve a breakthrough in bonding performance. The dry, hot, and boiling water strength of the bamboo bonded specimens without the formation of supramolecular bonding interface were 7.8, 6.4, and 4.9 MPa, respectively. After constructing the supramolecular bonding interface, the dry, hot, and boiling water strengths were enhanced by 37.2 %, 12.5 %, and 30.6 % to 10.7 MPa, 7.2 MPa, and 6.4 MPa, respectively. The results demonstrated that the host-guest recognition in the supramolecular bonding interface effectively enhanced the bonding performance. The present work utilizes biomass materials and supramolecular forces to achieve high-performance bonding of substrates, breaking the bonding performance enhancement mechanism of traditional adhesives and providing a new way for technological innovation in the field of bonding.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"716 ","pages":"Article 136765"},"PeriodicalIF":4.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly efficient removal of Mn(II) and organic pollutant by adipate functionalized Ca-Al layered double hydroxides: Capture behavior and mechanism","authors":"Yang Zhang ,&nbsp;Hanjun Wu ,&nbsp;Zhenyue Zhang ,&nbsp;Wenda Guo ,&nbsp;Junxia Yu ,&nbsp;Rongying Zeng ,&nbsp;Ruan Chi ,&nbsp;Zhiquan Pan","doi":"10.1016/j.colsurfa.2025.136774","DOIUrl":"10.1016/j.colsurfa.2025.136774","url":null,"abstract":"<div><div>In this work, Ca-Al LDHs were modified via co-precipitation method utilizing two distinct chemical forms of adipic acid (adipate salt and adipic acid) as intercalation agents, with the resulting materials denoted as At-LDHs (adipate-intercalated LDHs) and Aa-LDHs (adipic acid-intercalated LDHs). The results indicated that At-LDHs and Aa-LDHs all exhibit a sheet-like porous structure stacked with each other. Due to the different synthesis conditions, the sheet structure of Aa-LDHs is smaller than that of At-LDHs. The kinetic and isotherm simulation results indicated that the capture capacity of At-LDHs for Mn^2 + was up to 227.53 mg·g⁻¹ when the pH value was 7, while that of Aa-LDHs for naphthol green B reached to 132.73 mg·g⁻¹ at a pH value of 9. The kinetic and thermodynamic simulation results indicated that the capture of Mn²⁺ by At-LDHs conformed to the pseudo-first-order kinetic model and the Langmuir isotherm model, and the capture of naphthol green B by Aa-LDHs conformed to the Elovich kinetic model and the Temkin isotherm model. In addition, the capture process of both was a spontaneous exothermic reaction. Benefiting from the excellent adsorption properties of At-LDHs composites (Ion exchange, electrostatic attraction, adsorption precipitation, functional group chelation), the adsorption effect on Mn²⁺ was better. Aa-LDHs have good adsorption effect on naphthol green B in solution through electrostatic attraction, dipole-dipole hydrogen bond, Yoshida hydrogen bond and n-π interaction. At-LDHs and Aa-LDHs have great potential to be employed as the materials for the removal of organic and inorganic composite pollutants from wastewater.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"717 ","pages":"Article 136774"},"PeriodicalIF":4.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical evaluation of reference electrode for LiF-CaF2-LaF3 melt and electrochemical studies on Ni electrode","authors":"Jing Pan ,&nbsp;Yongde Yan ,&nbsp;Yuan Deng ,&nbsp;Xuepeng Wang ,&nbsp;Li Ding ,&nbsp;Yun Xue ,&nbsp;Fuqiu Ma ,&nbsp;Kai Zhu ,&nbsp;Wei Liu","doi":"10.1016/j.colsurfa.2025.136782","DOIUrl":"10.1016/j.colsurfa.2025.136782","url":null,"abstract":"<div><div>Reference electrode is considered to be very important in studies of the recovery of lanthanum (La) from fluorinated molten salt electrolysis. Undoubtedly, the search for economically stable reference electrodes is crucial. Herein, a Ni/NiF₂ reference electrode encapsulated in corundum material that can be used for electrochemical studies in LiF-CaF₂ melt is proposed. The performance of Ni/NiF₂ reference electrode in LiF-CaF₂ melt at 1113 K, such as stability and repeatability, is verified by the cyclic voltammetry (CV) method. Moreover, the electrochemical test results obtained with Ni/NiF₂ reference electrode and Pt quasi-reference electrode (QRE) were compared and analyzed. The diffusion coefficient of La(III) ions on the W electrode was calculated to be 7.72 × 10⁻⁵ cm² s⁻¹ using the Ni/NiF₂ reference electrode. Furthermore, the electrochemical behavior of La(III) on active Ni electrode was further investigated using a Ni/NiF₂ reference electrode, and La was successfully extracted on the Ni electrode. The results indicate that the Ni/NiF₂ reference electrode is extremely stable in LiF-CaF₂ melt, which opens a new possibility for reference electrode in fluoride salts.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"717 ","pages":"Article 136782"},"PeriodicalIF":4.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of separation angle on bubble-particle detachment behavior and detachment force","authors":"Shihao Ding ,&nbsp;Hongji Chen ,&nbsp;Wenqing Shi ,&nbsp;Xin Feng ,&nbsp;Chao Yang ,&nbsp;Xiahui Gui ,&nbsp;Yaowen Xing","doi":"10.1016/j.colsurfa.2025.136777","DOIUrl":"10.1016/j.colsurfa.2025.136777","url":null,"abstract":"<div><div>The study of bubble-particle detachment is crucial for enhancing the flotation effect of coarse particles and increasing the upper limit of flotation particle size. At present, there is a wide consensus on the normal direction detachment behavior of bubble-particle and the detachment force model. However, bubble-particle detachment may occur at arbitrary separation angle (<em>ω</em>) in actual flotation. Therefore, this study conducts an in-depth investigation into the effect of the separation angle on bubble-particle detachment. Firstly, using a self-made bubble-particle detachment testing system, the detachment behavior and detachment force of bubble-particle at different separation angles were tested. At the same time, the distribution of contact angles along the contact line in the normal direction (<em>ω</em>=0°) and non-normal direction (<em>ω</em>≠0°) detachment cases was tested, and the relevant models were revised. Finally, based on the revised contact angle distribution model, the detachment force model at arbitrary separation angle was derived, and the model prediction results were consistent with the experimental values. The study shows that with the increase of separation angle, the contact line in the bubble-particle detachment process successively shows the regularity of \"two-way synchronous contraction, two-way asynchronous contraction, one side contraction and one side fixed, one side contraction and one side spreading\", the contact angle changes from \"synchronous change\" to \"cross change\", and the detachment force decreases accordingly. In addition, it was found that when bubble-particle non-normal direction detachment occurs, the distribution of contact angles along the contact line is not the traditional step or linear model but shows a third-order distribution model. Based on this, the detachment force model at arbitrary angle was derived. This study not only helps to optimize the quantitative analysis of the bubble-particle detachment process but also provides strong support for the improvement of the bubble-particle turbulent detachment theory in the flotation process.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"717 ","pages":"Article 136777"},"PeriodicalIF":4.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication and characterization of chitosan/Ag@hydroxyapatite nanocomposite films for osteoregeneration: Insights into mechanical properties, biological performance, and drug release","authors":"Gowri Rengasamy,&nbsp;Sundrarajan Mahalingam","doi":"10.1016/j.colsurfa.2025.136790","DOIUrl":"10.1016/j.colsurfa.2025.136790","url":null,"abstract":"<div><div>Biopolymers based composites have contributed significantly to the advancement of biocompatibility in the field of biomedical applications. Hence, the appropriate biopolymers and their composites to generate effective biocomposite were prepared by combining chitosan (CS), polyvinyl alcohol (PVA), ceramic nanofiller hydroxyapatite (HAp), and silver nanoparticle (AgNPs) in casting method. The physicochemical behaviour showed the nanofiller enhances matrixes bonding, improving mechanical strength (6.8 MPa, elongation at break (∼11 %)) and thermal stability (enthalpy ΔH= 21989.8108 J/g), ensured interaction between them. In swelling and contact angle value (69 ± 2.0°) of the composite are modified with improved hydrophilicity on the surface area (15.9 m²/g) attributed the mesopores distribution. The 21.6 % of silver incorporation in the polymer matrix is to release of 0.0525 ppm by the swelling kinetics mechanism (R²=0.997). The gradual and controlled release of AgNPs effectively enhances antibacterial activity against S. aureus and E. coli, with zone inhibition of 19 ± 0.1 mm and 21 ± 0.1 mm, respectively. Further enhanced the cell adhesion and proliferation of human bone osteosarcoma cell line MG-63 IC₅₀ (12.17 at 100 µg) (P &lt; 0.001), and suggesting a potential of inhibition ability with different images on AO-EB staining. The biocomposite exhibits non-cytotoxicity and biocompatibility towards the human embryonic kidney HEK-293 cell line. The development of a CS/PVA/Ag@HAp biocomposite combined properties make it a multifunctional material maintaining biocompatibility suitable for antimicrobial and osteosarcoma treatment.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"717 ","pages":"Article 136790"},"PeriodicalIF":4.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Macromolecular pore model construction and theoretical study of Inner Mongolia Long-flame coal","authors":"Xiangjun Chen ,&nbsp;Peiqi Zuo ,&nbsp;Rui Min ,&nbsp;Guixin Zhang ,&nbsp;San Zhao","doi":"10.1016/j.colsurfa.2025.136772","DOIUrl":"10.1016/j.colsurfa.2025.136772","url":null,"abstract":"<div><div>Studying the sorption and wettability behavior of coal by molecular simulation requires an understanding of its molecular structural characteristics. Herein, a plane molecular model of coal in the Ordos region of Inner Mongolia was established through elemental analysis, nuclear magnetic resonance spectroscopy (NMR), Fourier transform infrared reflection (FTIR) and X-ray photoelectron spectroscopy (XPS) experiments. The results show that the coal belongs to long-flame coal. Its aromatic hydrocarbon content was 56.14 %, mainly dominated by benzene and naphthalene rings. The oxygen-containing functional groups (OGs) existed mainly in the C<img>O form. The aliphatic carbons were mainly composed of methylene groups. The N and S elements were present as pyrrole nitrogen and thiophene nitrogen, respectively. The molecular formula of the long-flame coal model was C₁₄₅H₈₇O₂₁NS. A microporous network of long-flame coal structures was constructed by molecular simulation. It was found that with the increase of the probe radius, the shape of the inaccessible holes changed to pear-shaped, tongue-shaped, and inverted bottle-shaped with a small mouth and large cavity, and aggregation and connection phenomena appeared between the holes. The appropriate aperture detection range should be determined to be between 0.1 and 0.44 nm. The main distribution regions of LUMO and HOMO orbitals of long-flame coal were determined by quantum chemical calculation. The IGMH (independent gradient model based on Hirshfeld partition) isosurfaces between long-flame coal and water were calculated, and the adsorption regions and interaction types of water on the surface of long-flame coal were clarified. The results provide the basis for enhanced coal wettability and improved dust suppression efficiency.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"717 ","pages":"Article 136772"},"PeriodicalIF":4.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Emulsion-stabilized silver nanoparticles vs. aqueous solutions: Effects on aggregation, elastic scattering, and nonlinear optical properties","authors":"Shirin Adampour,&nbsp;Mehdi Khazaei Nezhad,&nbsp;Soheil Sharifi","doi":"10.1016/j.colsurfa.2025.136795","DOIUrl":"10.1016/j.colsurfa.2025.136795","url":null,"abstract":"<div><div>Silver nanoparticles are stabilized using the stable emulsion developed by mixing water, n-heptane, AOT surfactant, and Ag nanoparticles, and their nonlinear optical characteristics are studied. The plasmonic and nonlinear optical properties of emulsion-stabilized silver nanoparticles are unique due to their placement inside n-heptane and the accumulation of water nanodroplets around them. The optimal concentration and stability time of silver nanoparticles in the emulsion have been investigated to achieve the highest nonlinear absorption coefficient. By comparing the emulsion and aqueous solutions including NaCl, NaOH, L-alanine, and CTAB, a significant increase in nonlinear optical absorption along with elastic light scattering was observed in the emulsion sample, which is the result of increased aggregation of Ag nanoparticles along with a decrease in the dielectric constant of the medium. As a result, the emulsion has been introduced as a tool for modifying the optical properties of Ag nanoparticles. Nonlinear absorption mechanisms, including processes involving free carriers and reverse saturation absorption, are described. Emulsion-stabilized Ag nanoparticles can be used in photodynamic therapy. Since encapsulation enhances nonlinear optical quantities, it can be used as a solution for an effective strategy for the detection and removal of toxic pollutants such as metal ions.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"717 ","pages":"Article 136795"},"PeriodicalIF":4.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, characterization of novel double long-chain alkyl quaternary ammonium salts and their catalytic performance in the preparation of organic sulfonates","authors":"X.Q. Zou ,&nbsp;F.W. Liu ,&nbsp;J.J. Liu ,&nbsp;J.X. Wang","doi":"10.1016/j.colsurfa.2025.136783","DOIUrl":"10.1016/j.colsurfa.2025.136783","url":null,"abstract":"<div><div>Two double long alkyl chains quaternary ammonium salts, DDOAB and 12-DE-12, were synthesized through the reactions of octadecyl bromide, dichloroethyl ether with <em>N, N</em>-dimethyl long-chain alkyl tertiary amine, respectively. The chemical structures of these compounds were characterized by ¹H NMR and HRMS. The critical micelle concentrations of DDOAB and 12-DE-12 in aqueous solution were measured to be 0.07 g/L (0.13 mmol/L) and 0.25 g/L (0.43 mmol/L), respectively. In aqueous solutions, the micelles of DDOAB and 12 - DE - 12 have diameters of approximately 5 nm and 2 nm, respectively. The catalytic activity of cetyltrimethylammonium bromide (CTAB), DDOAB, and 12-DE-12 in the reaction of alkyl halides with sulfites for the preparation of organosulfonates was evaluated. The reaction between CH₂Br₂ and K₂SO₃ was catalyzed by DDOAB (10 CMC) at 100 °C for 8 h, resulting in a 93 % yield of K₂[CH₂(SO₃)₂]. Under the same conditions, when 12-DE-12 (12 CMC) was used as the catalyst for 8 h, the yield of K₂[CH₂(SO₃)₂] reached 96 %. Compared with CTAB and DDOAB, the gemini surfactant 12-DE-12 exhibits better catalytic performance in the reaction of alkyl halides with sulfite. Additionally, a reaction mechanism for the reaction between CH₂Br₂ and K₂SO₃ has been proposed.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"717 ","pages":"Article 136783"},"PeriodicalIF":4.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}