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Petkov JT, Penfold J, Thomas RK. Surfactant self-assembly structures and multilayer formation at the solid-solution interface induces by electrolyte, polymers and proteins. Curr Opin Colloid Interface Sci 2022. [DOI: 10.1016/j.cocis.2021.101541] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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2
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Ou Z, Liang Z, Dong X, Tan F, Gong L, Zhao P, Wang H, Liu W, Zheng Z. Surfactants Mediated Synthesis of Highly Crystalline Thin Films of
Imine‐Linked
Covalent Organic Frameworks on Water Surface. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100493] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhaowei Ou
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Chemistry and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat‐Sen University Guangzhou Guangdong 510275 China
| | - Zihao Liang
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Chemistry and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat‐Sen University Guangzhou Guangdong 510275 China
| | - Xin Dong
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Chemistry and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat‐Sen University Guangzhou Guangdong 510275 China
| | - Fanglin Tan
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Chemistry and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat‐Sen University Guangzhou Guangdong 510275 China
| | - Li Gong
- Instrumental Analysis and Research Center, Sun Yat‐Sen University Guangzhou Guangdong 510275 China
| | - Pei Zhao
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Chemistry and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat‐Sen University Guangzhou Guangdong 510275 China
| | - Honglei Wang
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Chemistry and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat‐Sen University Guangzhou Guangdong 510275 China
| | - Wei Liu
- Key Laboratory of Low‐Carbon Chemistry & Energy Conservation of Guangdong Province, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Materials Science and Engineering, Sun Yat‐Sen University Guangzhou Guangdong 510275 China
| | - Zhikun Zheng
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Chemistry and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat‐Sen University Guangzhou Guangdong 510275 China
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Wang Z, Li P, Ma K, Chen Y, Webster JRP, Campana M, Yan Z, Penfold J, Thomas RK. Multivalent counterion induced multilayer adsorption at the air-water interface in dilute Aerosol-OT solutions. J Colloid Interface Sci 2021; 597:223-232. [PMID: 33872879 DOI: 10.1016/j.jcis.2021.03.183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 11/28/2022]
Abstract
The formation of surface multilayer structures, induced by the addition of multivalent counterions in dilute surfactant solutions, has been widely observed in a range of anionic surfactants. The phenomenon is associated with the ability to manipulate surface properties, especially in the promotion of enhanced surface wetting, and in the presence of an extensive near surface reservoir for rapid surface delivery of surfactant and other active components. HYPOTHESIS In the single alkyl chain anionic surfactants, such as sodium dodecysulfate, SDS, sodium alkylethoxylsulfate, SAES, and alkylestersulfonate, AES, surface multilayer formation is promoted by trivalent counterions such as Al3+, and is generally not observed with divalent counterions, such as Ca2+ or with monovalent counterions. In the di-alkyl chain anionic surfactant, dodecylbenzenesulfonate, LAS, surface multilayer formation now occurs in the presence of divalent counterions. It is attributed to the closer proximity of a bulk lamellar phase, resulting in a greater tendency for surface multilayer formation, and hence should occur in other di-alkyl chain anionic surfactants. EXPERIMENTS Aerosol-OT, AOT, is one of the most commonly used di-alkyl chain anionic surfactants, and is extensively used as an emulsifying, wetting and dispersing agent. This paper reports on predominantly neutron reflectivity, NR, measurements which explore the nature of surface multilayer formation of the sodium salt of AOT at the air-solution interface with the separate addition of Ca2+ and Al3+ counterions. FINDINGS In the AOT concentration range 0.5 to 2.0 mM surface multilayer formation occurs at the air-solution interface with the addition of Ca2+ or Al3+ counterions. Although the evolution in the surface structure with surfactant and counterion concentration is broadly similar to those reported for SDS, SAES and AES, some notable differences occur. In particular the surfactant and counterion concentration thresholds for surface multilayer formation are higher for Ca2+ than for Al3+. The differences encountered reflect the greater affinity of the di-alkyl chain structure for lamellar formation, and how the surface packing is controlled in part by the headgroup structure and the associated counterion binding affinity.
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Affiliation(s)
- Zi Wang
- School of Science, State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China; ISIS Facility, Rutherford Appleton Laboratory, STFC, Chilton, Didcot, Oxon OX11 0QX, UK
| | - Peixun Li
- ISIS Facility, Rutherford Appleton Laboratory, STFC, Chilton, Didcot, Oxon OX11 0QX, UK
| | - Kun Ma
- ISIS Facility, Rutherford Appleton Laboratory, STFC, Chilton, Didcot, Oxon OX11 0QX, UK
| | - Yao Chen
- ISIS Facility, Rutherford Appleton Laboratory, STFC, Chilton, Didcot, Oxon OX11 0QX, UK
| | - John R P Webster
- ISIS Facility, Rutherford Appleton Laboratory, STFC, Chilton, Didcot, Oxon OX11 0QX, UK
| | - Mario Campana
- ISIS Facility, Rutherford Appleton Laboratory, STFC, Chilton, Didcot, Oxon OX11 0QX, UK
| | - Zifeng Yan
- School of Science, State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China.
| | - Jeff Penfold
- ISIS Facility, Rutherford Appleton Laboratory, STFC, Chilton, Didcot, Oxon OX11 0QX, UK; Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, UK.
| | - Robert K Thomas
- Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, UK
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Wang Z, Li P, Ma K, Chen Y, Yan Z, Penfold J, Thomas RK, Campana M, Webster JR, Li Z, Neil JH, Xu H, Petkov J, Roberts DW. α-Sulfo alkyl ester surfactants: Impact of changing the alkyl chain length on the adsorption, mixing properties and response to electrolytes of the tetradecanoate. J Colloid Interface Sci 2021; 586:876-890. [DOI: 10.1016/j.jcis.2020.10.122] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 11/16/2022]
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Zhou R, Jin Y, Shen Y, Lai S, Zhou Y, Zhao P. Surface activity, salt and pH tolerance, and wettability of novel nonionic fluorinated surfactants with a short fluorocarbon chain. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1768862] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Rong Zhou
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education , Chengdu , China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University , Chengdu , China
| | - Yong Jin
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education , Chengdu , China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University , Chengdu , China
| | - Yichao Shen
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education , Chengdu , China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University , Chengdu , China
| | - Shuangquan Lai
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education , Chengdu , China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University , Chengdu , China
| | - Yutang Zhou
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education , Chengdu , China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University , Chengdu , China
| | - Peng Zhao
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education , Chengdu , China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University , Chengdu , China
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Li P, Wang Z, Ma K, Chen Y, Yan Z, Penfold J, Thomas RK, Campana M, Webster JR, Washington A. Multivalent electrolyte induced surface ordering and solution self-assembly in anionic surfactant mixtures: Sodium dodecyl sulfate and sodium diethylene glycol monododecyl sulfate. J Colloid Interface Sci 2020; 565:567-581. [DOI: 10.1016/j.jcis.2020.01.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 01/10/2020] [Accepted: 01/12/2020] [Indexed: 10/25/2022]
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7
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Zhao X, Nathanson GM, Andersson GG. Experimental Depth Profiles of Surfactants, Ions, and Solvent at the Angstrom Scale: Studies of Cationic and Anionic Surfactants and Their Salting Out. J Phys Chem B 2020; 124:2218-2229. [PMID: 32075369 DOI: 10.1021/acs.jpcb.9b11686] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Neutral impact ion scattering spectroscopy (NICISS) is used to measure the depth profiles of ionic surfactants, counterions, and solvent molecules on the angstrom scale. The chosen surfactants are 0.010 m tetrahexylammonium bromide (THA+/Br-) and 0.0050 m sodium dodecyl sulfate (Na+/DS-) in the absence and presence of 0.30 m NaBr in liquid glycerol. NICISS determines the depth profiles of the elements C, O, Na, S, and Br through the loss in energy of 5 keV He atoms that travel into and out of the liquid, which is then converted into depth. In the absence of NaBr, we find that THA+ and its Br- counterion segregate together because of charge attraction, forming a narrow double layer that is 10 Å wide and 150 times more concentrated than in the bulk. With the addition of NaBr, THA+ is "salted out" to the surface, increasing the interfacial Br- concentration by 3-fold and spreading the anions over a ∼30 Å depth. Added NaBr similarly increases the interfacial concentration of DS- ions and broadens their positions. Conversely, the dissolved Br- ions are significantly depleted over a depth of 0-40 Å from the surface because of charge repulsion from DS- ions within the interfacial region. These different interfacial Br- propensities correlate with previously measured gas-liquid reactivities: gaseous Cl2 readily reacts with Br- ions in the presence of THA+ but drops 70-fold in the presence of DS-, demonstrating that surfactant headgroup charge controls the reactivity of Br- through changes in its depth profile.
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Affiliation(s)
- Xianyuan Zhao
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Gilbert M Nathanson
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Gunther G Andersson
- Institute for Nanoscale Science and Technology, Flinders University, Adelaide, SA 5001, Australia
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Orczyk M, Wojciechowski K, Brezesinski G. The influence of steroidal and triterpenoid saponins on monolayer models of the outer leaflets of human erythrocytes, E. coli and S. cerevisiae cell membranes. J Colloid Interface Sci 2019; 563:207-217. [PMID: 31874308 DOI: 10.1016/j.jcis.2019.12.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 12/02/2019] [Accepted: 12/04/2019] [Indexed: 01/15/2023]
Abstract
The present paper discusses the use of monolayers of lipid mixtures mimicking the composition of biological membranes of bacteria, erythrocyte and yeast in the context of the anti-bacterial, hemolytic and anti-fungal activity of saponins. Saponins are plant-produced glycosidic biosurfactants with either steroidal or triterpenoidal aglycone. In the present study we used digitonin as a representative steroidal saponin (extracted from Digitalis purpurea) and a mixture of triterpenoid saponins from Quillaja saponaria Molina. The effect of saponins was studied first on monolayers consisting of single lipids characteristic for the given type of biological membrane, and then - on model mixed lipid monolayers. Finally, the monolayers were formed from total lipid extracts of natural cell membranes (E. coli and S. cerevisiae) to verify the results obtained in the simplified models. The effect of saponins on monolayers was studied by a combination of surface pressure relaxation, infrared reflection - absorption spectroscopy (IRRAS) and fluorescence microscopy. In line with expectations, sterols (cholesterol and ergosterol) play a major role in the saponin-lipid interactions in monolayers, which may explain especially the hemolytic and antifungal properties of saponins. In contrast, bacterial membranes are devoid of sterols, although the presence of similar compounds may be responsible for their affinity to saponins. Nevertheless, the effect of saponins on bacterial models is less pronounced than for the erythrocyte or fungal ones.
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Affiliation(s)
- M Orczyk
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - K Wojciechowski
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
| | - G Brezesinski
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, 14476 Potsdam, Germany
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Wang Z, Li P, Ma K, Chen Y, Penfold J, Thomas RK, Roberts DW, Xu H, Petkov JT, Yan Z, Venero DA. The structure of alkyl ester sulfonate surfactant micelles: The impact of different valence electrolytes and surfactant structure on micelle growth. J Colloid Interface Sci 2019; 557:124-134. [DOI: 10.1016/j.jcis.2019.09.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 09/03/2019] [Accepted: 09/04/2019] [Indexed: 11/16/2022]
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