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Lu H, Bao L, Dong Q, Li X, Dong J. Coal-Based Branched Vicinal Diol Ethoxylates Versus Guerbet Alcohol Ethoxylates: Role of Tertiary Hydroxyl Groups. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:12539-12552. [PMID: 38842621 DOI: 10.1021/acs.langmuir.4c00965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Branched surfactants exhibit a lower surface tension, excellent low defoaming performance, and better wetting ability compared with linear surfactants, making them promising for applications in industrial cleaning. In this study, 2-hexyl-1-decene (C8 olefin dimer), obtained from the dimerization of 1-octene, was used as the hydrophobe to synthesize branched nonionic surfactants via hydroxylation and ethoxylation. The hydroxylation of the C8 olefin dimer to synthesize 2-hexyldecane-1,2-diol (C8 BD) using H2O2 and HCOOH was investigated systematically. Under the optimal reaction conditions (H2O2/C8 olefin dimer molar ratio: 1.5, HCOOH/C8 olefin dimer molar ratio: 4.0, reaction time: 10 h, reaction temperature: 50 °C), the conversion of the C8 olefin dimer and selectivity toward C8 BD were found to reach 99.96 and 79.89%, respectively. Further, branched nonionic surfactants (C8 BDEn) were synthesized via ethoxylation of C8 BD with ethylene oxide and characterized using FTIR, LCMS, 1H NMR, and 13C NMR techniques. The presence of a tertiary hydroxyl group in C8 BD increases the reactivity of the primary hydroxyl group, leading to a narrower range of products and lower residual substrate content. The physicochemical properties and surface properties of C8 BDEn with different degrees of ethoxylation at various concentrations were investigated and compared with those of commercially available Guerbet alcohol polyoxyethylene ethers (C8 GAEO9 and C6 GAEO9). The results show that, compared with C8 GAEO9 and C6 GAEO9, C8 BDE6 displayed a higher surface activity with a lower equilibrium surface tension (27.14 mN·m-1), superior wettability with a smaller contact angle (39.2°), better emulsification performance with a longer emulsification time of 548 s, and excellent foaming properties (initial foam volume of 11.6 mL). This strategy of utilizing coal-based α-olefins for the synthesis of branched nonionic surfactants presents a route to prepare value-added fine chemicals from coal-based resources.
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Affiliation(s)
- Haochuan Lu
- College of Chemical Engineering and Technology, Shanxi Key Laboratory of Chemical Product Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China
| | - Lining Bao
- College of Chemical Engineering and Technology, Shanxi Key Laboratory of Chemical Product Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China
| | - Qingwen Dong
- College of Chemical Engineering and Technology, Shanxi Key Laboratory of Chemical Product Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China
| | - Xu Li
- College of Chemical Engineering and Technology, Shanxi Key Laboratory of Chemical Product Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China
| | - Jinxiang Dong
- College of Chemical Engineering and Technology, Shanxi Key Laboratory of Chemical Product Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China
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Deyab MA, Ibrahim IZ, El-Shamy OAA, Khalil KA, Awad AF, Alghamdi MM, El-Zahhar AA, Abo-Riya MA. Synthesis, surface activity, and corrosion inhibition capabilities of new non-ionic gemini surfactants. Sci Rep 2024; 14:8040. [PMID: 38580731 PMCID: PMC10997777 DOI: 10.1038/s41598-024-57853-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 03/22/2024] [Indexed: 04/07/2024] Open
Abstract
Several environmentally acceptable non-ionic gemini surfactants are synthesized in this work using natural sources, including polyethenoxy di-dodecanoate (GSC12), polyethenoxy di-hexadecanoate (GSC16), and polyethenoxy di-octadecenoate (GSC18). The produced surfactants are confirmed by spectrum studies using FT-IR, 1HNMR, and 13CNMR. It explored and examined how the length of the hydrocarbon chain affected essential properties like foaming and emulsifying abilities. Surface tension examinations are used to assess the surface activity of the examined gemini surfactants. The lower value of critical micelle concentrations (0.381 × 10-4M) is detected for GSC18. Their spontaneous character is shown by the negative values of the free energy of adsorption (ΔGads) and micellization (ΔGmic) which arranged in the order GSC18 > GSC16 > GSC12. Based on theoretical, weight loss, and electrochemical investigations, these novel surfactants were investigated for their possible use in inhibiting carbon steel from corroding in 1 M HCl. Measuring results show that GSC18 inhibits corrosion in carbon steel by 95.4%. The isotherm of adsorption evaluated for the investigated inhibitors and their behavior obeys Langmuir isotherm.
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Affiliation(s)
- M A Deyab
- Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt.
| | - Ibrahim Z Ibrahim
- Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt
| | | | - Khalil A Khalil
- Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Abdelhamid F Awad
- Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Majed M Alghamdi
- Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, 61413, Abha, Saudi Arabia
| | - Adel A El-Zahhar
- Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, 61413, Abha, Saudi Arabia
| | - Mohamed A Abo-Riya
- Chemistry Department, Faculty of Science, Benha University, Benha, 13518, Egypt
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Rana AA, Yusaf A, Shahid S, Usman M, Ahmad M, Aslam S, Al-Hussain SA, Zaki MEA. Unveiling the Role of Nonionic Surfactants in Enhancing Cefotaxime Drug Solubility: A UV-Visible Spectroscopic Investigation in Single and Mixed Micellar Formulations. Pharmaceuticals (Basel) 2023; 16:1663. [PMID: 38139790 PMCID: PMC10747636 DOI: 10.3390/ph16121663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/18/2023] [Accepted: 11/22/2023] [Indexed: 12/24/2023] Open
Abstract
This study reports the interfacial phenomenon of cefotaxime in combination with nonionic surfactants, Triton X-100 (TX-100) and Tween-80 (TW-80), and their mixed micellar formulations. Cefotaxime was enclosed in a micellar system to improve its solubility and effectiveness. TX-100 and TW-80 were used in an amphiphilic self-assembly process to create the micellar formulation. The effect of the addition of TX-100, a nonionic surfactant, on the ability of TW-80 to solubilize the drug was examined. The values of the critical micelle concentration (CMC) were determined via UV-Visible spectroscopy. Gibbs free energies (ΔGp and ΔGb), the partition coefficient (Kx), and the binding constant (Kb) were also computed. In a single micellar system, the partition coefficient (Kx) was found to be 33.78 × 106 and 2.78 × 106 in the presence of TX-100 and TW-80, respectively. In a mixed micellar system, the value of the partition coefficient for the CEF/TW-80 system is maximum (5.48 × 106) in the presence of 0.0019 mM of TX-100, which shows that TX-100 significantly enhances the solubilizing power of micelles. It has been demonstrated that these surfactants are effective in enhancing the solubility and bioavailability of therapeutic compounds. This study elaborates on the physicochemical characteristics and solubilization of reactive drugs in single and mixed micellar media. This investigation, conducted in the presence of surfactants, shows a large contribution to the binding process via both hydrogen bonding and hydrophobic interactions.
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Affiliation(s)
- Aysha Arshad Rana
- Department of Chemistry, Government College Women University, Faisalabad 38000, Pakistan
| | - Amnah Yusaf
- Department of Chemistry, Government College Women University, Faisalabad 38000, Pakistan
| | - Salma Shahid
- Department of Biochemistry, Government College Women University, Faisalabad 38000, Pakistan
| | - Muhammad Usman
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Matloob Ahmad
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Sana Aslam
- Department of Chemistry, Government College Women University, Faisalabad 38000, Pakistan
| | - Sami A. Al-Hussain
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
| | - Magdi E. A. Zaki
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
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Hechenbichler M, Prause A, Gradzielski M, Laschewsky A. Thermoresponsive Self-Assembly of Twofold Fluorescently Labeled Block Copolymers in Aqueous Solution and Microemulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5166-5182. [PMID: 34734729 DOI: 10.1021/acs.langmuir.1c02318] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A nonionic double hydrophilic block copolymer with a long permanently hydrophilic and a small thermoresponsive block is synthesized by reversible addition-fragmentation chain-transfer polymerization (RAFT). By employing a specifically designed chain-transfer agent, the polymer is functionalized with complementary end groups which are suited for Förster resonance energy transfer (FRET). The end group attached to the permanently hydrophilic block of poly(N,N-dimethylacrylamide) pDMAm is designed as a permanently hydrophobic segment ("sticker") comprising a long alkyl chain and the 4-aminonaphthalimide fluorophore. The other end attached to the thermoresponsive block of poly(N-isopropylacrylamide) pNiPAm incorporates a coumarin fluorophore. The temperature-dependent self-assembly of the twofold fluorescently labeled copolymer is studied in pure aqueous solution as well as in an o/w microemulsion by several techniques including turbidimetry, dynamic light scattering (DLS), and fluorescence spectroscopy. It is compared to the behaviors of the analogous twofold-labeled pDMAm and pNiPAm homopolymer references. The findings indicate that the block copolymer behaves as a polymeric surfactant at low temperatures, with one relatively small hydrophobic end block and an extended hydrophilic chain forming "hairy micelles". At elevated temperatures above the LCST phase transition of the pNiPAm block, however, the copolymer behaves as an associative telechelic polymer with two nonsymmetrical hydrophobic end blocks, which do not mix. Thus, instead of a network of bridged "flower micelles", large dynamic aggregates are formed. These are connected alternatingly by the original micellar cores as well as by clusters of the collapsed pNiPAm blocks. This type of structure is even more favored in the o/w microemulsion than in pure aqueous solution, as the microemulsion droplets constitute an attractive anchoring point for the hydrophobic dodecyl sticker but not for the collapsed pNiPAm chains.
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Affiliation(s)
- Michelle Hechenbichler
- Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam-Golm, Germany
| | - Albert Prause
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, FG Physical Chemistry/Molecular Material Science Institute of Chemistry, Technische Universität Berlin, Straße des 17 Juni 124, 10623 Berlin, Germany
| | - Michael Gradzielski
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, FG Physical Chemistry/Molecular Material Science Institute of Chemistry, Technische Universität Berlin, Straße des 17 Juni 124, 10623 Berlin, Germany
| | - André Laschewsky
- Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam-Golm, Germany
- Fraunhofer Institute of Applied Polymer Research IAP, Fraunhofer Institute, Geiselbergstr. 69, 14476 Potsdam-Golm, Germany
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Li Y, Hou W. A Model for the Structure of Adsorbed Layers at Solid/Liquid Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:2267-2275. [PMID: 35134293 DOI: 10.1021/acs.langmuir.1c02921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Understanding the structure of adsorbed layers, including their composition (the mole fraction of sorbate, xA) and thickness (dal), is of great significance for revealing the nature of adsorption and guiding its applications. Many techniques have been used to estimate the structure of adsorbed layers of organics at solid/liquid interfaces. However, there is still a lack of feasible thermodynamic models to describe the correlation between the structure (more precisely, xA and dal) and the equilibrium adsorption amount (Γe). Herein, a thermodynamic model, called the dynamic bonding equilibrium (DBE) model, was developed on the basis of the adsorption equilibrium thermodynamics with an assumption that, at adsorption equilibrium, the sorbate and solvent within the adsorbed layer both exist in different bonding states. The DBE model relates xA and dal with Γe and thus can predict or describe the structure (xA and dal) of adsorbed layers from Γe. Its rationale was confirmed by the literature-reported adsorption data of organics, including surfactants, proteins, and polymers, on hydrophilic and hydrophobic surfaces in water. This work provides a feasible approach for obtaining information about the structure of adsorbed layers at solid/liquid interfaces.
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Affiliation(s)
- Ying Li
- Key Laboratory of Colloid & Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, P. R. China
| | - Wanguo Hou
- Key Laboratory of Colloid & Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, P. R. China
- National Engineering Technology Research Center of Colloidal Materials, Shandong University, Jinan 250100, P. R. China
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Tan J, Zhang YF. Synthesis and micellization of cationic trisiloxane surfactants with poly(ethylene glycol). Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127946] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Adsorption Properties and Composition of Binary Kolliphor Mixtures at the Water-Air Interface at Different Temperatures. Molecules 2022; 27:molecules27030877. [PMID: 35164143 PMCID: PMC8839182 DOI: 10.3390/molecules27030877] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 11/16/2022] Open
Abstract
The studies on the adsorption properties and composition of the adsorbed monolayer at the water–air interface of the binary Kolliphor® ELP (ELP) and Kolliphor® RH 40 (RH40) mixtures based on the measurements of the surface tension (γLV) of their aqueous solution in the temperature range from 293 to 318 K were carried out. The γLV isotherms were described by the exponential function of the second order and the Szyszkowski equation as well as predicted by Fainerman and Miller equation. The obtained γLV isotherms were analyzed using the exponential function of the second order, the Szyszkowski, Fainerman and Miller as well as independent adsorption equations. The γLV isotherms were also used for determination of the Gibbs surface excess concentration of RH40, ELP and their mixture (Γ) at the water–air interface as well as the mixed monolayer composition. Based on Γ and the constant a in the Szyszkowski equation, the standard thermodynamic functions of adsorption were considered. From the consideration dealing with the γLV isotherms obtained by us, it results, among others, that these isotherms for the non-ideal solution of macromolecular surfactants mixture can be predicted using the Fainerman and Miller equation. From this consideration, it also results that a simple method proposed by us, based on the isotherms of RH40 and ELP, allows us to predict the composition of their mixed monolayer in the whole concentration range of RH40 and ELP in the bulk phase.
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