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1. Equilibrium and kinetically trapped aggregates in polyelectrolyte–oppositely charged surfactant mixtures

Author:
Guzmán, Eduardo; Fernández-Peña, Laura; Ortega, Francisco; Rubio, Ramón G.
Source:
Current opinion in colloid & interface science 2020 v.48 pp. 91-108
ISSN:
1359-0294
Subject:
surfactants,   etc   ; electrolytes; physicochemical properties;     Show all 3 Subjects
Abstract:
... The widespread of mixtures formed by polyelectrolytes and oppositely charged surfactants in different industrial sectors requires a thorough understanding of the physicochemical bases governing their interactions. These interactions lead to the formation of polyelectrolyte–surfactant aggregates, with the presence of such aggregates in the aqueous mixtures impacting decisively on their bulk and int ...
DOI:
10.1016/j.cocis.2020.04.002

2. Current perspective of sustainable surfactants based on renewable building blocks

Author:
Bhadani, Avinash; Kafle, Ananda; Ogura, Taku; Akamatsu, Masaaki; Sakai, Kenichi; Sakai, Hideki; Abe, Masahiko
Source:
Current opinion in colloid & interface science 2020 v.45 pp. 124-135
ISSN:
1359-0294
Subject:
surfactants,   etc   ; ingredients; organic matter;     Show all 3 Subjects
Abstract:
... Surfactants are active or essential ingredient of several industrial and consumer formulations. These amphiphilic organic molecules demonstrate unique ability to adsorb at the interface and self-aggregate or self-assemble into different phases in aqueous or nonaqueous solution. In recent years, environmental concerns coupled with increased consumer awareness have guided substantial growth of envir ...
DOI:
10.1016/j.cocis.2020.01.002

3. Coming to Order: Adsorption and Structure of Nonionic Polymer at the Oil/Water Interface as Influenced by Cationic and Anionic Surfactants

Author:
Altman, Rebecca M.; Richmond, Geraldine L.
Source:
Langmuir 2020 v.36 no.8 pp. 1975-1984
ISSN:
1520-5827
Subject:
anionic surfactants; cationic surfactants,   etc   ; adsorption; electrolytes; oils; polyacrylamide; spectroscopy;     Show all 7 Subjects
Abstract:
... Polymer–surfactant mixtures are versatile chemical systems because of their ability to form a variety of complexes both in bulk solution and at surfaces. The adsorption and structure of polymer–surfactant complexes at the oil/water interface define their use surface chemistry applications. Previous studies have investigated the interactions between charged polyelectrolytes and surfactants; however ...
DOI:
10.1021/acs.langmuir.9b03375

4. The fabrication of supramolecular assembly with quadruple switchable fluorescence by ionic self-assembly strategy

Author:
Sui, Pengliang; Li, Qiuhong; Yu, Huajie; Luo, Dongqin; Zhang, Zhaoyu; Si, Weimeng; Li, Aixiang
Source:
Colloids and surfaces 2020 v.596 pp. 124708
ISSN:
0927-7757
Subject:
surfactants,   etc   ; dyes; fluorescence; micelles; sulfates;     Show all 5 Subjects
Abstract:
... The supramolecular assembly with quadruple fluorescence switching behavior was fabricated by the complexation of cationic ferrocenyl surfactant, 16-alkyl (ferrocenyl-methyl) ammonium bromide (Fc16AB) and anionic dye molecule, Orange G (OG) via ionic self-assembly (ISA) strategy. The obtained micromaterials exhibited different morphologies (including rod-like fiber, spindle micelle and fiber bundle ...
DOI:
10.1016/j.colsurfa.2020.124708

5. Pickering–Ramsden emulsions stabilized with chemically and morphologically anisotropic particles

Author:
Iwashita, Yasutaka
Source:
Current opinion in colloid & interface science 2020 v.49 pp. 94-106
ISSN:
1359-0294
Subject:
surfactants,   etc   ; anisotropy; colloids; emulsions; isotropy; nanotechnology;     Show all 6 Subjects
Abstract:
... Recent developments in nanotechnology have facilitated the use of surface-active colloidal particles with tailor-made anisotropic properties. These surface-active agents have introduced unprecedented emulsion systems that exhibit qualitatively different self-assembled/organized structures and material properties from those of emulsions with conventional surfactants or isotropic colloidal particles ...
DOI:
10.1016/j.cocis.2020.05.004

6. Recent advances in particle-based simulation of surfactants

Author:
Taddese, Tseden; Anderson, Richard L.; Bray, David J.; Warren, Patrick B.
Source:
Current opinion in colloid & interface science 2020 v.48 pp. 137-148
ISSN:
1359-0294
Subject:
surfactants,   etc   ; adsorption; micelles; molecular dynamics; surface tension;     Show all 5 Subjects
Abstract:
... We review the recent literature on particle-based simulation of surfactants, focusing on key methodological developments in the areas of surfactant self-assembly, micelle formation, micelle kinetics, the properties of worm-like micelles, interfacial adsorption and surface tension. We pay particular attention to dissipative particle dynamics where a considerable amount of work has been performed re ...
DOI:
10.1016/j.cocis.2020.04.001

7. Surfactant-enhanced aquifer remediation: Mechanisms, influences, limitations and the countermeasures

Author:
Huo, Lili; Liu, Guansheng; Yang, Xin; Ahmad, Zulfiqar; Zhong, Hua
Source:
Chemosphere 2020 v.252 pp. 126620
ISSN:
0045-6535
Subject:
surfactants,   etc   ; aquifers; nonaqueous phase liquids; pollution; remediation;     Show all 5 Subjects
Abstract:
... In recent years, surfactant-enhanced aquifer remediation (SEAR) has attracted increasing interest duo to the high efficiency of removing non-aqueous phase liquids (NAPLs) from aquifer. A thorough understanding of SEAR is necessary for its successful implementation in field remediation. This paper reviewed the SEAR technology in a comprehensive way based on the recent research advances. Firstly, an ...
DOI:
10.1016/j.chemosphere.2020.126620

8. Langmuir–Scheaffer Technique as a Method for Controlled Alignment of 1D Materials

Author:
Bodik, Michal; Maxian, Ondrej; Hagara, Jakub; Nadazdy, Peter; Jergel, Matej; Majkova, Eva; Siffalovic, Peter
Source:
Langmuir 2020 v.36 no.16 pp. 4540-4547
ISSN:
1520-5827
Subject:
surfactants,   etc   ; Raman spectroscopy; carbon nanotubes; mathematical models;     Show all 4 Subjects
Abstract:
... A widely applicable method for aligning 1D materials, and in particular carbon nanotubes (CNTs), independent of their preparation would be very useful as the growth methods for these materials are substance-specific. Langmuir–Schaefer (LS) deposition could be such an approach for alignment, as it aligns a large number of 1D materials independently of the desired substrate. However, the mechanism a ...
DOI:
10.1021/acs.langmuir.0c00045

9. Measuring slow heteroaggregation rates in the presence of fast homoaggregation

Author:
Cao, Tianchi; Trefalt, Gregor; Borkovec, Michal
Source:
Journal of colloid and interface science 2020 v.566 pp. 143-152
ISSN:
0021-9797
Subject:
anionic surfactants,   etc   ; latex; light scattering; sulfates;     Show all 4 Subjects
Abstract:
... Homoaggregation and heteroaggregation involving amidine and sulfate latex particles in the presence of the anionic surfactant octyl sulfate (OS) is studied by light scattering. This surfactant causes a charge reversal of the amidine particles. This reversal induces a rapid homoaggregation near the charge reversal point. In the presence of the same surfactant, the sulfate particles remain negativel ...
DOI:
10.1016/j.jcis.2020.01.075

10. Defying gravity: Drops that climb up a vertical wall of their own accord

Author:
Tadmor, R.; Baksi, A.; Gulec, S.; Jadhav, S.; N'guessan, H.E.; Somasi, V.; Tadmor, M.; Tang, S.; Wasnik, P.; Yadav, S.
Source:
Journal of colloid and interface science 2020 v.562 pp. 608-613
ISSN:
0021-9797
Subject:
surfactants,   etc   ; amines; gravity; liquids; mica; solutes; swimming;     Show all 7 Subjects
Abstract:
... Drops that move uphill on a gradient surface have been introduced in the past. In this paper, however, we present drops that climb a surface that does not have a gradient to begin with. In our study, Octadecylamine in Tetradecane (ODA/TD) drops were placed on either vertical or horizontal mica surfaces, and both the cases show spreading and retraction that initiate the motion of the ODA/TD drops. ...
DOI:
10.1016/j.jcis.2019.10.120

11. Disintegration of Surfactant Micelles at Metal–Water Interfaces Promotes Their Strong Adsorption

Author:
Singh, Himanshu; Sharma, Sumit
Source:
TheJournal of physical chemistry 2020 v.124 no.11 pp. 2262-2267
ISSN:
1520-5207
Subject:
cationic surfactants,   etc   ; Gibbs free energy; adsorption; micelles;     Show all 4 Subjects
Abstract:
... We have studied the adsorption behavior of micelles of cationic surfactants at metal–water interfaces via fully atomistic simulations. We show that the micelles experience a free energy barrier to adsorption. Near the metal surface, surfactant molecules in the micelles slowly rearrange, leading to complete disintegration of the micelles. The disintegration of the micelles results in much stronger ...
DOI:
10.1021/acs.jpcb.9b10780

12. Temperature-controlled regioselective thiolation of 2-indolylmethanols under aqueous micellar conditions

Author:
Zhu, Shengzhen; Zhang, Yu; Luo, Jinyue; Wang, Fei; Cao, Xiaoji; Huang, Shenlin
Source:
Green chemistry 2020 v.22 no.3 pp. 657-661
ISSN:
1463-9270
Subject:
surfactants,   etc   ; catalysts; green chemistry; regioselectivity; sulfides; thiols;     Show all 6 Subjects
Abstract:
... A sustainable and regioselective synthesis of highly functionalized indole-based sulfides from thiols and 2-indolymethanols is described. Notably, this reaction can be performed in the presence of 5 mol% In(OTf)₃ under aqueous micellar conditions using an inexpensive surfactant DBSA. This protocol offers several advantages including excellent regioselectivities, being organic solvent-free, ease of ...
DOI:
10.1039/c9gc04155a

13. Lactobionamide-based fluorinated detergent for functional and structural stabilization of membrane proteins

Author:
Faugier, Clarisse; Igonet, Sébastien; Cornut, Damien; Besson, Romain; Durand, Grégory; Jawhari, Anass
Source:
Methods 2020
ISSN:
1046-2023
Subject:
surfactants,   etc   ; detergents; drugs; purinergic receptors; solubilization; transporters;     Show all 6 Subjects
Abstract:
... Membrane proteins (MPs) are important drug discovery targets for a wide range of diseases. Conventional detergents such as n-Dodecyl β-D-maltoside have been used largely and efficiently to solubilize MPs with varying degrees of success concerning MPs functionality and stability. Fluorinated surfactants (FSs) have shown a great potential for the stabilization of various MPs. However, so far only a ...
DOI:
10.1016/j.ymeth.2020.02.005

14. A review of electrokinetically enhanced bioremediation technologies for PHs

Author:
Saini, Anish; Bekele, Dawit Nega; Chadalavada, Sreenivasulu; Fang, Cheng; Naidu, Ravi
Source:
Journal of environmental sciences (China) 2020 v.88 pp. 31-45
ISSN:
1001-0742
Subject:
surfactants,   etc   ; bioremediation; groundwater; hydrocarbons; petroleum; soil; technology;     Show all 7 Subjects
Abstract:
... Since the early 1980’s there have been several different strategies designed and applied to the remediation of subsurface environment including physical, chemical and biological approaches. They have had varying degrees of success in remediating contaminants from subsurface soils and groundwater. The objective of this review is to examine the range of technologies for the remediation of contaminan ...
DOI:
10.1016/j.jes.2019.08.010

15. Dual-Stage Method Using Supercritical and Subcritical Water for Precise Control of Size and Distribution of CeO₂ Nanoparticles

Author:
Orita, Yasuhiko; Akizuki, Makoto; Oshima, Yoshito
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.7 pp. 3035-3043
ISSN:
1520-5045
Subject:
surfactants,   etc   ; ceric oxide; nanoparticles; temperature; variance;     Show all 5 Subjects
Abstract:
... In the synthesis of metal oxide nanoparticles (NPs), methods to control their size and distribution have been desired. Precise and rapid control without the use of organic surfactants is a serious challenge. In this study, we report a strategy, dual-stage method using supercritical and subcritical water, for precise and rapid control of the size and distribution of NPs and applied it to the synthe ...
DOI:
10.1021/acs.iecr.9b06754

16. On the Mechanism of Shear-Thinning in Viscous Oppositely Charged Polyelectrolyte Surfactant Complexes (PESCs)

Author:
Del Sorbo, Giuseppe Rosario; Prévost, Sylvain; Schneck, Emanuel; Gradzielski, Michael; Hoffmann, Ingo
Source:
TheJournal of physical chemistry 2020 v.124 no.5 pp. 909-913
ISSN:
1520-5207
Subject:
anionic surfactants,   etc   ; crosslinking; electrolytes; sodium dodecyl sulfate;     Show all 4 Subjects
Abstract:
... Semidilute mixtures of the cationically modified cellulose-based polyelectrolyte JR 400 and the anionic surfactant sodium dodecyl sulfate (SDS) form highly viscous solutions if a slight excess of charges from the polyelectrolyte is present. The reason for this is the formation of mixed rodlike aggregates in which the surfactant cross-links several polyelectrolyte chains. The same solutions also sh ...
DOI:
10.1021/acs.jpcb.9b10467

17. Photo-responsive wormlike micellar systems based on mixed cationic/anionic surfactants and mixed photo-sensitive additives

Author:
Nan, Yan-Qing; Liu, Jian-Xiu; Zhang, Sha-Sha; Chen, Deng-Jing; Ye, Qiu-Xiang; Yuan, Cheng; Hao, Li-Sheng
Source:
Colloids and surfaces 2020 v.601 pp. 124988
ISSN:
0927-7757
Subject:
anionic surfactants; cationic surfactants,   etc   ; additives; bile salts; environmental impact; micelles; moieties; photoisomerization; sodium; ultraviolet radiation; viscosity;     Show all 11 Subjects
Abstract:
... A method to construct photo-responsive wormlike micellar systems with high photo-responsive efficiency and strong photo-responsive ability and reduced impact on the environment by mixed cationic/anionic surfactants and mixed photo-sensitive additives has been proposed. For this purpose, a cleavable cationic ester-containing gemini surfactant, N,N’-bis(2-(dodecanoyloxy)ethyl)-N,N,N’,N’-tetramethyl- ...
DOI:
10.1016/j.colsurfa.2020.124988

18. Impact of anionic and cationic surfactants interfacial tension on the oil recovery enhancement

Author:
Pan, Fei; Zhang, Zaixu; Zhang, Xiaoxuan; Davarpanah, Afshin
Source:
Powder technology 2020 v.373 pp. 93-98
ISSN:
0032-5910
Subject:
anionic surfactants; cationic surfactants,   etc   ; adsorption; cetyltrimethylammonium bromide; micelles; oils; porous media; sulfonic acids; surface tension; wettability;     Show all 10 Subjects
Abstract:
... Surfactant flooding is considered as one of the efficient chemical enhanced oil recovery techniques in recent decades as it has the potential ability to alter the wettability and reduce the interfacial tension of water-oil. Addition of surfactants has caused a dramatic decrease in the interfacial of water-oil. Thereby, the capillary number has increased and has caused to enhance oil mobilization i ...
DOI:
10.1016/j.powtec.2020.06.033

19. Mesoporous Silica Formation Mechanisms Probed Using Combined Spin–Echo Modulated Small-Angle Neutron Scattering (SEMSANS) and Small-Angle Neutron Scattering (SANS)

Author:
Schmitt, Julien; Zeeuw, Jan Joost; Plomp, Jeroen; Bouwman, Wim G.; Washington, Adam L.; Dalgliesh, Robert M.; Duif, Chris P.; Thijs, Michel A.; Li, Fankang; Pynn, Roger; Parnell, Steven R.; Edler, Karen J.
Source:
ACS applied materials & interfaces 2020 v.12 no.25 pp. 28461-28473
ISSN:
1944-8252
Subject:
cationic surfactants; nonionic surfactants,   etc   ; films (materials); liquid-air interface; neutron diffraction; porous media; silica;     Show all 7 Subjects
Abstract:
... The initial formation stages of surfactant-templated silica thin films which grow at the air–water interface were studied using combined spin–echo modulated small-angle neutron scattering (SEMSANS) and small-angle neutron scattering (SANS). The films are formed from either a cationic surfactant or nonionic surfactant (C₁₆EO₈) in a dilute acidic solution by the addition of tetramethoxysilane. Previ ...
DOI:
10.1021/acsami.0c03287

20. Corn Oil–Water Separation: Interactions of Proteins and Surfactants at Corn Oil/Water Interfaces

Author:
Zhang, Chengcheng; Gao, Jinpeng; Hankett, Jeanne; Varanasi, Prabodh; Borst, Joseph; Shirazi, Yaser; Zhao, Shouxun; Chen, Zhan
Source:
Langmuir 2020 v.36 no.15 pp. 4044-4054
ISSN:
1520-5827
Subject:
surfactant proteins; surfactants,   etc   ; corn; corn oil; droplets; emulsifiers; emulsifying; emulsions; pH; spectroscopy; zein;     Show all 11 Subjects
Abstract:
... Purification and collection of industrial products from oil–water mixtures are commonly implemented processes. However, the efficiencies of such processes can be severely influenced by the presence of emulsifiers that induce the formation of small oil droplets dispersed in the mixtures. Understanding of this emulsifying effect and its counteractions which occur at the oil/water interface is theref ...
DOI:
10.1021/acs.langmuir.0c00338