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Glikman D, Wyszynski L, Lindfeld V, Hochstädt S, Hansen MR, Neugebauer J, Schönhoff M, Braunschweig B. Charge Regulation at the Nanoscale as Evidenced from Light-Responsive Nanoemulsions. J Am Chem Soc 2024; 146:8362-8371. [PMID: 38483326 DOI: 10.1021/jacs.3c14112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Emulsions are indispensable in everyday life, and the demand for emulsions' diversity and control of properties is therefore substantial. As emulsions possess a high internal surface area, an understanding of the oil/water (o/w) interfaces at the molecular level is fundamental but often impaired by experimental limitations to probe emulsion interfaces in situ. Here, we have used light-responsive surfactants (butyl-AAP) that can photoisomerize between E and Z isomers by visible and UV light irradiation to tune the emulsion interfaces. This causes massive changes in the interface tension at the extended o/w interfaces in macroemulsions and a drastic shift in the surfactants' critical micelle concentration, which we show can be used to control both the stability and phase separation. Strikingly different from macroemulsions are nanoemulsions (RH ∼90 nm) as these are not susceptible to E/Z photoisomerization of the surfactants in terms of changes in their droplet size or ζ-potential. However, in situ second-harmonic scattering and pulsed-field gradient nuclear magnetic resonance (NMR) experiments show dramatic and reversible changes in the surface excess of surfactants at the nanoscopic interfaces. The apparent differences in ζ-potentials and surface excess provide evidence for a fixed charge to particle size ratio and the need for counterion condensation to renormalize the particle charge to a critical charge, which is markedly different compared to the behavior of very large particles in macroemulsions. Thus, our findings may have broader implications as the electrostatic stabilization of nanoparticles requires much lower surfactant concentrations, allowing for a more sustainable use of surfactants.
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Affiliation(s)
- Dana Glikman
- Institute of Physical Chemistry, University of Münster, Corrensstraße 28/30, 48149 Münster, Germany
- Center for Soft Nanoscience, University of Münster, Busso-Peus-Straße 10, 48149 Münster, Germany
| | - Leonard Wyszynski
- Institute of Physical Chemistry, University of Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Valentin Lindfeld
- Organic Chemistry Institute, University of Münster, Corrensstraße 36, 48149 Münster, Germany
- Center for Multiscale Theory and Computation, University of Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Sebastian Hochstädt
- Institute of Physical Chemistry, University of Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Michael Ryan Hansen
- Institute of Physical Chemistry, University of Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Johannes Neugebauer
- Organic Chemistry Institute, University of Münster, Corrensstraße 36, 48149 Münster, Germany
- Center for Multiscale Theory and Computation, University of Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Monika Schönhoff
- Institute of Physical Chemistry, University of Münster, Corrensstraße 28/30, 48149 Münster, Germany
- Center for Soft Nanoscience, University of Münster, Busso-Peus-Straße 10, 48149 Münster, Germany
| | - Björn Braunschweig
- Institute of Physical Chemistry, University of Münster, Corrensstraße 28/30, 48149 Münster, Germany
- Center for Soft Nanoscience, University of Münster, Busso-Peus-Straße 10, 48149 Münster, Germany
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2
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Rakesh N, Tu H, Chang P, Gebreyesus ST, Lin C. Innovative Real-Time Flow Sensor Using Detergent-Free Complex Emulsions with Dual-Emissive Semi-Perfluoroalkyl Substituted Α-Cyanostilbene. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2304108. [PMID: 37702128 PMCID: PMC10625100 DOI: 10.1002/advs.202304108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/16/2023] [Indexed: 09/14/2023]
Abstract
In this study, the potential of complex emulsions is investigated as transducers in sensing applications. Complex emulsions are stabilized without external detergents by developing a novel α-cyanostilbene substituted with PEG and semi-perfluoroalkyl chain (CNFCPEG). CNFCPEG exhibits unique variable emission properties depending on its aggregation state, allowing dual blue and green emissions in complex emulsions with hydrocarbon-in-fluorocarbon-in-water (H/F/W) morphology. The green excimer emissions result from the self-assembly of CNFCPEG at the fluorocarbon/water interface, while the blue emission observed is due to aggregation in the organic phase. A novel flow-injection method is developed by incorporating complex emulsions with CNFCPEG into multiple-well flow chips (MWFC). Iodine is successfully detected in a mobile aqueous solution by monitoring morphology changes. The findings demonstrate that self-stabilized complex emulsions with MWFC hold great promise for real-time sensing without costly instruments.
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Affiliation(s)
- Narani Rakesh
- Department of ChemistryNational Dong Hwa UniversityShoufeng974301Taiwan
| | - Hsiung‐Lin Tu
- Institute of ChemistryAcademia SinicaNangangTaipei115201Taiwan
| | - Po‐Chun Chang
- Department of ChemistryNational Dong Hwa UniversityShoufeng974301Taiwan
| | | | - Che‐Jen Lin
- Department of ChemistryNational Dong Hwa UniversityShoufeng974301Taiwan
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3
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Han Y, Dai C, Duan Y, Tu Y, Liu S, Zhang Y. Synthesis and Surface Properties of Photoresponsive Gemini Surfactants: Implication for Remediating PAHs-Contaminated Groundwater. ACS APPLIED MATERIALS & INTERFACES 2023; 15:10642-10650. [PMID: 36790397 DOI: 10.1021/acsami.2c20623] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The efficient utility of surfactants remains a daunting task for groundwater remediation. In this study, we have synthesized a conventional photoresponsive surfactant 4-[4-[(4-butylphenyl)azo]phenoxy]butyldimethylethylammonium bromide (AzoPB) and a gemini photoresponsive surfactant N1,N2-bis[4-[4-[(4-butylphenyl)azo]phenoxy]butyl]-N1,N2-tetramethylethane-1,2-diammonium bromide (AzoPBT) for solubilizing PAHs in groundwater. The two surfactants' photosensitivity, surface properties, and solubilization/release ability for phenanthrene (Phe) and acenaphthylene (Ace) were studied in detail. Under UV-light irradiation for 15-20 s, the two surfactants can be converted from trans to cis, while cis-to-trans isomerization can be achieved under visible-light irradiation for 1 min. Compared to AzoPB, AzoPBT exhibited strong surface properties such as lower critical micelle concentration (0.52 mM), surface tension (γ, 28.94 mN·m-1), minimum area (Amin, 1.72 × 10-8 nm2), and higher maximum adsorption (Γmax, 96.55 mol·m-2). The solubility of Phe and Ace in the AzoPBT aqueous solution (12.84 and 14.27 mg/L) was much higher than that in the AzoPB aqueous solution (7.51 and 8.77 mg/L) and gradually increased as the surfactant concentration increased in both aqueous solutions. Compared to AzoPB, gemini surfactant AzoPBT exhibited stronger solubilization ability. After four cycles of cis-trans isomerization conversion, AzoPBT could still reduce the hydrophobicity of Phe in natural groundwater, although the solubility of Phe decreased slightly. Additionally, the release capacity of AzoPBT was significantly higher than that of AzoPB during the cyclic solubilization-release process. The results indicated that gemini photoresponsive surfactants should be preferable to conventional photoresponsive surfactants for groundwater remediation due to their higher solubilization and release efficiency for Phe in the cyclic solubilization and release process, which can improve repair efficiency, minimize secondary pollution, and reduce remediation costs.
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Affiliation(s)
- Yueming Han
- College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China
| | - Chaomeng Dai
- College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China
| | - Yanping Duan
- School of Environmental and Geographical Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, P. R. China
- Institute of Urban Studies, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
- Yangtze River Delta Urban Wetland Ecosystem National Field Observation and Research Station, Shanghai 200234, P. R. China
| | - Yaojen Tu
- School of Environmental and Geographical Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, P. R. China
| | - Shuguang Liu
- College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China
| | - Yalei Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
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4
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Light-switchable emulsions: From reversible emulsification-demulsification to controllable microreactors. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.121166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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5
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Wu Y, Zeng M, Cheng Q, Huang C. Recent Progress toward Physical Stimuli-Responsive Emulsions. Macromol Rapid Commun 2022; 43:e2200193. [PMID: 35622941 DOI: 10.1002/marc.202200193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 04/30/2022] [Indexed: 11/11/2022]
Abstract
Emulsion as a fine dispersion of immiscible liquids has involved widespread applications in industry, pharmaceuticals, agriculture and personal care. Stimuli-responsive emulsions capable of on-demand demulsification or changing their properties are required in many cases such as controllable release cargo, oil recovery, emulsifiers recycle and product separation, great progress has been achieved in these areas. Among these various triggers, much effort has been made to develop physical stimuli, due to the noninvasive and environmentally friendly characteristics. Physical stimuli-responsive emulsions provide a plenty of valuable practical applications in the fields of sustainable industry, biomedical reaction, drug delivery. Here, we summarize the recent development in the field of emulsions in response to physical stimuli consisting of temperature, light, magnetic field, electrical field, etc. The preparation methods and mechanisms of physical stimuli-responsive emulsions and their applications of catalysis reaction, drug delivery, and oil recovery are highlighted in this review. The future directions and outstanding problems of the physical stimuli-responsive emulsions are also discussed. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Yutian Wu
- School of chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430070, China
| | - Min Zeng
- School of chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430070, China
| | - Quanyong Cheng
- School of chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430070, China
| | - Caili Huang
- School of chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430070, China
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6
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Li Y, Liu Y, Wang L, Lu H. A pH-sensitive W/O emulsion for the preparation and rapid dissolution of polyacrylamide-based friction reducer. NEW J CHEM 2022. [DOI: 10.1039/d2nj00999d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The pH-sensitive modified-polyacrylamide emulsion shows a fast dissolution rate with a dissolution time of about 1 min and long storage stability.
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Affiliation(s)
- Yanping Li
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Ya Liu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Li Wang
- School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu 610500, P. R. China
| | - Hongsheng Lu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu 610500, P. R. China
- Engineering Research Center of Oilfield Chemistry, Ministry of Education, Chengdu 610500, P. R. China
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7
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Thakur S, Dasmahapatra AK, Bandyopadhyay D. Self-Organized Liquid Crystal Droplets as Phototunable Softmasks. ACS APPLIED MATERIALS & INTERFACES 2021; 13:60697-60712. [PMID: 34874157 DOI: 10.1021/acsami.1c21811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A single-step self-organized pathway is harnessed to generate large-area and high-density liquid-crystal (LC) microdroplets via rapid spreading of an LC-laden volatile liquid film on an aqueous surfactant bath. The surfactant loading on the water bath and LC loading in the solvent fluid help in tuning the size, periodicity, and ordering of LC microdroplets. Remarkably, the experiments reveal a transition from a spinodal to heterogeneous nucleation pathway of dewetting when the surfactant loading is modulated from below to beyond the critical micellar concentration in the aqueous phase. In the process, a host of unprecedented drop formation modes, such as dewetting and contact-line instability, random ejection, and "fire cracker" toroid splitting, have been uncovered. Subsequently, the LC microdroplets on the air-water interface are employed as photomasks suitable for soft-photolithography applications. Such masks help in the decoration of a host of mesoscale three-dimensional features on the films of photoresists when photons are guided through the LC droplets. In such a scenario, phase transition of LC droplets under solvent vapor annealing is employed to control the movement of photons through drops and subsequently modulate the light exposure on the photoresist surface. Such a simple soft-photolithography setup leads to an array of flattened droplets on a positive resist, while donut features are observed on the negative tone. Remarkably, the orientation of nematogens within 4-cyano-4'-pentylbiphenyl droplets and at the three-phase contact-line provides additional handles in controlling the transmission of photons, which facilitates such a unique pattern formation. A number of low-cost and simple strategies are also discussed to order such soft-photolithography patterns. Importantly, with a minor modification to the same experimental setup, we could also measure the variation in the order parameter of the LC droplet during its phase transitions from the nematic to isotropic state.
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Affiliation(s)
- Siddharth Thakur
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Ashok Kumar Dasmahapatra
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Dipankar Bandyopadhyay
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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8
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9
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Syntheses and properties of new photo-responsive gemini surfactants containing azobenzene group. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Seshadri S, Bailey SJ, Zhao L, Fisher J, Sroda M, Chiu M, Stricker F, Valentine MT, Read de Alaniz J, Helgeson ME. Influence of Polarity Change and Photophysical Effects on Photosurfactant-Driven Wetting. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:9939-9951. [PMID: 34370465 DOI: 10.1021/acs.langmuir.1c00769] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Photosurfactants have shown considerable promise for enabling stimuli-responsive control of the properties and motion of fluid interfaces. Recently, a number of photoswitch chemistries have emerged to tailor the photoresponsive properties of photosurfactants. However, systematic studies investigating how photoresponsive surfactant behavior depends on the photochemical and photophysical properties of the switch remain scarce. In this work, we develop synthetic schemes and surfactant designs to produce a well-controlled library of photosurfactants to comparatively assess the behavior of photoswitch chemistry on interfacial behavior. We employ photoinduced spreading of droplets at fluid interfaces as a model for such studies. We show that although photosurfactant response is largely guided by expected trends with changes in polarity of the photoswitch, interfacial behavior also depends nontrivially and sometimes counter-intuitively on the kinetics and mechanisms of photoswitching, particularly at the interface of two solvents, as well as on complex interactions with other surfactants. Understanding these complexities enables the design of new photosurfactant systems and their optimization toward responsive functions including triggered spreading, dewetting, and destabilization of droplets on solid and fluid surfaces.
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Affiliation(s)
- Serena Seshadri
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Sophia J Bailey
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Lei Zhao
- Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Julia Fisher
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Miranda Sroda
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Michelle Chiu
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Friedrich Stricker
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Megan T Valentine
- Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Javier Read de Alaniz
- Department of Chemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Matthew E Helgeson
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
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11
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Su L, Sun J, Ding F, Gao X, Zheng L. Molecular insight into photoresponsive surfactant regulated reversible emulsification and demulsification processes. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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12
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Yuan X, Zhang Y, Li Z, Huo F, Dong Y, He H. Stimuli‐Responsive
Ionic Liquids and the Regulation of Aggregation Structure and Phase Behavior†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000414] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xiao‐Qing Yuan
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
| | - Ya‐Qin Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
| | - Zhi‐Yong Li
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University Xinxiang Henan 453007 China
| | - Feng Huo
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
| | - Yi‐Hui Dong
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
| | - Hong‐Yan He
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
- Dalian National Laboratory for Clean Energy Dalian Liaoning 116023 China
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13
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Nam SH, Choi YJ, Kim YW, Jun K, Jeong NH, Oh SG, Kang HC. Syntheses and characterization of new photoresponsive surfactants, N-(azobenzene-4-oxy-2-hydroxypropyl)-N-(alkyloxy-2-hydroxypropyl) aminopropyl sulfonic acid sodium salt. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.07.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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14
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15
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Schnurbus M, Campbell RA, Droste J, Honnigfort C, Glikman D, Gutfreund P, Hansen MR, Braunschweig B. Photo-Switchable Surfactants for Responsive Air–Water Interfaces: Azo versus Arylazopyrazole Amphiphiles. J Phys Chem B 2020; 124:6913-6923. [DOI: 10.1021/acs.jpcb.0c02848] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Marco Schnurbus
- Institute of Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
- Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, Busso-Peus-Straße 10, 48149 Münster, Germany
| | - Richard A. Campbell
- Division of Pharmacy & Optometry, University of Manchester, Manchester M13 9PT, United Kingdom
| | - Jörn Droste
- Institute of Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Christian Honnigfort
- Institute of Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
- Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, Busso-Peus-Straße 10, 48149 Münster, Germany
| | - Dana Glikman
- Institute of Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
- Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, Busso-Peus-Straße 10, 48149 Münster, Germany
| | - Philipp Gutfreund
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, Grenoble CEDEX 9 38042, France
| | - Michael Ryan Hansen
- Institute of Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Björn Braunschweig
- Institute of Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
- Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, Busso-Peus-Straße 10, 48149 Münster, Germany
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16
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Zhu C, Lu Y, Sun J, Yu Y. Dynamic Interfacial Regulation by Photodeformable Azobenzene-Containing Liquid Crystal Polymer Micro/Nanostructures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:6611-6625. [PMID: 32449856 DOI: 10.1021/acs.langmuir.0c00582] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Photoresponsive materials offer local, temporal, and remote control over their chemical or physical properties under external stimuli, giving new tools for interfacial regulation. Among all, photodeformable azobenzene-containing liquid crystal polymers (azo-LCPs) have received increasing attention because they can be processed into various micro/nanostructures and have the potential to reversibly tune the interfacial properties through chemical and/or morphological variation by light, providing effective dynamic interface regulation. In this feature article, we highlight the milestones in the dynamic regulation of different interfacial properties through micro/nanostructures made of photodeformable azobenzene-containing liquid crystal polymers (azo-LCPs). We describe the preparation of different azo-LCP micro/nanostructures from the aspects of materials and processing techniques and reveal the importance of mesogen orientation toward dynamic interfacial regulation. By introducing our recently developed linear azo-LCP (azo-LLCP) with good mechanical and photoresponsive performances, we discuss the challenge and opportunity with respect to the dynamic light regulation of two- and three-dimensional (2D/3D) micro/nanostructures to tune their related interfacial properties. We have also given our expectation toward exploring photodeformable micro/nanostructures for advanced applications such as in microfluidics, biosensors, and nanotherapeutics.
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Affiliation(s)
- Chongyu Zhu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, 220 Handan Road, Shanghai, 200433, China
| | - Yao Lu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, 220 Handan Road, Shanghai, 200433, China
| | - Jiahao Sun
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, 220 Handan Road, Shanghai, 200433, China
| | - Yanlei Yu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, 220 Handan Road, Shanghai, 200433, China
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17
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Chen A, Liu X, Wu Y, Luo G, Xu JH. Interactions between CO 2-Responsive Switchable Emulsion Droplets Determined by Using Optical Tweezers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:4600-4606. [PMID: 32299211 DOI: 10.1021/acs.langmuir.0c00203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
CO2-responsive switchable emulsions have been of great interest in some industrial processes where the stability of the emulsion is only required temporarily, such as oil transport, drug delivery, and fossil fuel production. The good understanding of the stability and instability mechanism is vital to the switchable behavior between emulsification and demulsification. Herein, a novel approach was developed to determine the interactions between two switchable emulsion droplets directly by a dual-laser optical tweezers instrument. The repulsive force between a couple of tetradecane droplets occurs to increase progressively with the increasing concentration of switchable surfactant in solutions. However, the repulsive force appears to decrease progressively in turn when the switchable surfactant concentration is far higher than the critical micelle concentration (CMC). Moreover, the depletion effect starts to emerge in the higher surfactant concentration which is attributed to the switchable surfactant micelles generated in solutions. In addition, according to the measurements of interaction forces, a mechanism of the switchable behavior is well proposed, which is established by the principle of self-assembly/detachment of the switchable surfactant, resulting in the weakening and re-enhancing of the electrostatic double-layer (EDL) repulsive forces between tetradecane droplets, upon selective introduction and removal of CO2. Based on this work, a novel perspective was provided to study the switchable emulsion, which can contribute instructive messages for the understanding of stability and instability mechanisms of switchable emulsions.
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Affiliation(s)
- An Chen
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Xueyan Liu
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Yuxin Wu
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Guangsheng Luo
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Jian-Hong Xu
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
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18
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Fan Y, Cai S, Xu D, Sun Q, Liu X, Zhang Y, Fang Y. Reversible-Tuning Krafft Temperature of Selenium-Containing Ionic Surfactants by Redox Chemistry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3514-3521. [PMID: 32172567 DOI: 10.1021/acs.langmuir.9b03747] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An easy, effective, and reversible strategy for tuning the Krafft temperature (KT) of selenium-containing ionic surfactants, with head groups ranging in nature from anionic to amphoteric, has been achieved for the first time via the redox chemistry of selenium. After oxidation with H2O2, the selenide group was converted to a more hydrophilic selenoxide group. This made the oxidized forms of the surfactants more water-soluble, which results in a marked reduction in the KT. In contrast, the hydrophilic selenoxide was restored to its reduced form of selenide via reduction reaction, which allowed the KT value to return to its initial value. By alternating the oxidization and reduction treatments, the KT of the selenium-containing surfactants in this work could be reversibly switched over 5-10 cycles without causing obvious adverse distortions.
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Affiliation(s)
- Ye Fan
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Shuang Cai
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Dekun Xu
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Qin Sun
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Xuefeng Liu
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Yongmin Zhang
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Yinjun Fang
- Zanyu Technology Group Company Ltd., Hangzhou 310009, P. R. China
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19
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CO 2/N 2-responsive oil-in-water emulsions using a novel switchable surfactant. J Colloid Interface Sci 2020; 571:134-141. [PMID: 32199266 DOI: 10.1016/j.jcis.2020.03.045] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/10/2020] [Accepted: 03/11/2020] [Indexed: 11/23/2022]
Abstract
HYPOTHESIS Recently, switchable or stimuli-responsive emulsions have attracted much research interest in many industrial fields. In this work, a novel CO2/N2-responsive surfactant was designed and developed to facilitate the formation of switchable oil-in-water (O/W) emulsions with fast switching characteristics between a stable emulsion and separate phases upon alternatively bubbling CO2 and N2. EXPERIMENTS The novel CO2/N2-responsive surfactant was facilely prepared by mixing an anionic fatty acid (oleic acid) and a cationic amine (1,3-Bis (aminopropyl) tetramethyldisiloxane) at a 1:1 molecular ratio, which was assembled based on electrostatic interactions. The structure and properties of the novel CO2/N2-responsive switchable surfactant were investigated by Fourier-transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (1H NMR) spectroscopy, and interfacial tensions. FINDINGS The developed surfactant shows an excellent interfacial activity at the oil/water interface, which can significantly reduce the dosage of the switchable surfactant compared with previous CO2/N2-responsive surfactants. The dynamic interfacial tension of n-decane and aqueous phase decreased from 45 mN m-1 to 5 mN m-1 within 100 s with the addition of 0.2 mM surfactant. In this work, a low concentration of the novel switchable surfactant (e.g., 20.0 mM) can realize reversible emulsification and demulsification in an emulsion system as compared with the high dosage (e.g., ~150 mM) in previous reports, which will bring huge economic benefits in industrial applications in the future. Moreover, this work expands the family of ion-pair surfactants to small amino-functionalized molecules beyond Jeffamine D-230, which promotes the development of simple and switchable ion-pair surfactant. It is found that the O/W emulsions stabilized by the switchable surfactant show excellent stability, which can be stored for over 60 days at room temperature without any obvious change. Interestingly, the stable O/W emulsion is completely demulsified upon bubbling CO2 for 30 s and can be easily re-emulsified to the initial state after purging N2 at 60 °C within 10 min, which demonstrates a rapid and highly efficient switching behavior. The reversible emulsification and demulsification process is ascribed to the reversible assembly and disassembly of the switchable surfactant, which is induced by the removal and purge of CO2.
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20
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Zhu P, Liu D, Dai S, Wang B, Lu H, Huang Z. Redox and pH Dual-Responsive Emulsion Using Ferrocenecarboxylic Acid and N, N-Dimethyldodecylamine. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2368-2374. [PMID: 31957456 DOI: 10.1021/acs.langmuir.9b03679] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The derivatives of ferrocene with redox properties are widely used. Some studies have used complex synthesis processes to obtain surfactants with redox properties. In order to simplify the synthesis process, FA-DMDA-Ox, a surfactant with redox and pH dual responses, was prepared by simple electrostatic interaction between ferrocenecarboxylic acid (FA) and N,N-dimethyldodecylamine (DMDA). A stable oil-in-water emulsion was prepared by using FA-DMDA-Ox at 25 °C. When sodium sulfite was added to the emulsion, the emulsion was demulsified. This was due to the oxidized ferrocene group that was reduced from the charged hydrophilic state to the uncharged hydrophobic state, which destroyed the original surface activity. In addition, when added HCl or NaOH to the emulsion changed pH, demulsification was caused by the dissociation of FA-DMDA-Ox.
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Affiliation(s)
- Peiyao Zhu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Dongfang Liu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Shanshan Dai
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
- Engineering Research Center of Oilfield Chemistry, Ministry of Education, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Baogang Wang
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
- Oil & Gas Field Applied Key Chemistry Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Hongsheng Lu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
- Engineering Research Center of Oilfield Chemistry, Ministry of Education, Southwest Petroleum University, Chengdu 610500, P. R. China
- Oil & Gas Field Applied Key Chemistry Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Zhiyu Huang
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
- Engineering Research Center of Oilfield Chemistry, Ministry of Education, Southwest Petroleum University, Chengdu 610500, P. R. China
- Oil & Gas Field Applied Key Chemistry Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu 610500, P. R. China
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21
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Scott PJ, Kasprzak CR, Feller KD, Meenakshisundaram V, Williams CB, Long TE. Light and latex: advances in the photochemistry of polymer colloids. Polym Chem 2020. [DOI: 10.1039/d0py00349b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Unparalleled temporal and spatial control of colloidal chemical processes introduces immense potential for the manufacturing, modification, and manipulation of latex particles.
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Affiliation(s)
- Philip J. Scott
- Department of Chemistry
- Macromolecules Innovation Institute
- Virginia Tech
- Blacksburg
- USA
| | | | - Keyton D. Feller
- Department of Mechanical Engineering
- Macromolecules Innovation Institute
- Virginia Tech
- Blacksburg
- USA
| | | | - Christopher B. Williams
- Department of Mechanical Engineering
- Macromolecules Innovation Institute
- Virginia Tech
- Blacksburg
- USA
| | - Timothy E. Long
- Department of Chemistry
- Macromolecules Innovation Institute
- Virginia Tech
- Blacksburg
- USA
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22
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Jiang R, Liu C, Tan LT, Lin C. Formation of carboxymethylchitosan/gemini surfactant adsorption layers at the air/water interface: Effects of association in the bulk. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2018.1462195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Rong Jiang
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, China
| | - Chang Liu
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, China
| | - Li Ting Tan
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, China
| | - Cuiying Lin
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, China
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23
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Hayat Z, Bchellaoui N, Deo C, Métivier R, Bogliotti N, Xie J, Buckle M, El Abed AI. Fast Active Merging of Microdroplets in Microfluidic Chambers Driven by Photo-Isomerisation of Azobenzene Based Surfactants. BIOSENSORS-BASEL 2019; 9:bios9040129. [PMID: 31683751 PMCID: PMC6956313 DOI: 10.3390/bios9040129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 10/25/2019] [Accepted: 10/28/2019] [Indexed: 11/16/2022]
Abstract
In this work, we report on the development of a newly synthesized photoactive reversible azobenzene derived surfactant polymer, which enables active and fast control of the merging of microdroplets in microfluidic chambers, driven by a pulsed UV laser optical stimulus and the well known cis-trans photo-isomerisation of azobenzene groups. We show for the first time that merging of microdroplets can be achieved optically based on a photo-isomerization process with a high spatio-temporal resolution. Our results show that the physical process lying behind the merging of microdroplets is not driven by a change in surface activity of the droplet stabilizing surfactant under UV illumination (as originally expected), and they suggest an original mechanism for the merging of droplets based on the well-known opto-mechanical motion of azobenzene molecules triggered by light irradiation.
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Affiliation(s)
- Zain Hayat
- Laboratoire de Photonique Quantique et Moléculaire (LPQM), UMR 8537, Ecole Normale Supérieure Paris Saclay, CentraleSupélec, CNRS, Université Paris-Saclay, 61 avenue du Président Wilson, 94235 Cachan, France.
| | - Nizar Bchellaoui
- Laboratoire de Photonique Quantique et Moléculaire (LPQM), UMR 8537, Ecole Normale Supérieure Paris Saclay, CentraleSupélec, CNRS, Université Paris-Saclay, 61 avenue du Président Wilson, 94235 Cachan, France.
| | - Claire Deo
- Photophysique et Photochimie Supramoléculaires et Macromoléculaires (PPSM), UMR 8531, Ecole Normale Supérieure Paris Saclay, CNRS, Université Paris-Saclay, 61 avenue du Président Wilson, 94235 Cachan, France.
| | - Rémi Métivier
- Photophysique et Photochimie Supramoléculaires et Macromoléculaires (PPSM), UMR 8531, Ecole Normale Supérieure Paris Saclay, CNRS, Université Paris-Saclay, 61 avenue du Président Wilson, 94235 Cachan, France.
| | - Nicolas Bogliotti
- Photophysique et Photochimie Supramoléculaires et Macromoléculaires (PPSM), UMR 8531, Ecole Normale Supérieure Paris Saclay, CNRS, Université Paris-Saclay, 61 avenue du Président Wilson, 94235 Cachan, France.
| | - Juan Xie
- Photophysique et Photochimie Supramoléculaires et Macromoléculaires (PPSM), UMR 8531, Ecole Normale Supérieure Paris Saclay, CNRS, Université Paris-Saclay, 61 avenue du Président Wilson, 94235 Cachan, France.
| | - Malcolm Buckle
- Laboratoire de Biologie et Pharmacologie AppliquéE (LBPA), UMR 8113, Ecole Normale Supérieure Paris Saclay, CNRS, Université Paris-Saclay, 61 avenue du Président Wilson, 94235 Cachan, France.
| | - Abdel I El Abed
- Laboratoire de Photonique Quantique et Moléculaire (LPQM), UMR 8537, Ecole Normale Supérieure Paris Saclay, CentraleSupélec, CNRS, Université Paris-Saclay, 61 avenue du Président Wilson, 94235 Cachan, France.
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24
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Jasinski F, Guimarães TR, David S, Suniary C, Funston T, Takahashi Y, Kondo Y, Zetterlund PB. Reversible Destabilization of UV‐Responsive Polymer Particles (Latex) using a Photoresponsive Surfactant. Macromol Rapid Commun 2019; 40:e1900355. [DOI: 10.1002/marc.201900355] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/22/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Florent Jasinski
- Centre for Advanced Macromolecular Design (CAMD)School of Chemical EngineeringUniversity of New South Wales Sydney NSW 2052 Australia
| | - Thiago R. Guimarães
- Centre for Advanced Macromolecular Design (CAMD)School of Chemical EngineeringUniversity of New South Wales Sydney NSW 2052 Australia
| | - Samantha David
- Centre for Advanced Macromolecular Design (CAMD)School of Chemical EngineeringUniversity of New South Wales Sydney NSW 2052 Australia
| | - Caroline Suniary
- Centre for Advanced Macromolecular Design (CAMD)School of Chemical EngineeringUniversity of New South Wales Sydney NSW 2052 Australia
| | - Toby Funston
- Centre for Advanced Macromolecular Design (CAMD)School of Chemical EngineeringUniversity of New South Wales Sydney NSW 2052 Australia
| | - Yutaka Takahashi
- New Industry Creation Hatchery Center (NICHe)Tohoku University Sendai Miyagi 980‐8577 Japan
| | - Yukishige Kondo
- Department of Industrial ChemistryFaculty of EngineeringTokyo University of Science 1–3 Kagurazaka, Shinjuku Tokyo 162‐8601 Japan
| | - Per B. Zetterlund
- Centre for Advanced Macromolecular Design (CAMD)School of Chemical EngineeringUniversity of New South Wales Sydney NSW 2052 Australia
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25
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Ali MRK, Wu Y, Chapman S, Ding Y. Synthesis, structure evolution, and optical properties of gold nanobones. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-03884-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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26
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An interplay between spacer nature and alkyl chain length on aqueous micellar properties of cationic Gemini surfactants: A multi-technique approach. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.01.044] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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27
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Chen X, Ma X, Yan C, Sun D, Yeung T, Xu Z. CO2-responsive O/W microemulsions prepared using a switchable superamphiphile assembled by electrostatic interactions. J Colloid Interface Sci 2019; 534:595-604. [DOI: 10.1016/j.jcis.2018.09.029] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 09/06/2018] [Accepted: 09/10/2018] [Indexed: 12/27/2022]
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28
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Liu D, Suo Y, Tan J, Zhu P, Zhao J, Wang B, Lu H. Tertiary Amine-Naphthenic Acid Self-Assembled Surfactants for Viscosity Reduction of Crude Oil. Chem Eng Technol 2018. [DOI: 10.1002/ceat.201700489] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dongfang Liu
- Southwest Petroleum University; College of Chemistry and Chemical Engineering; No. 8 Xindu Avenue 610500 Chengdu China
| | - Yuxin Suo
- Southwest Petroleum University; College of Chemistry and Chemical Engineering; No. 8 Xindu Avenue 610500 Chengdu China
| | - Jiang Tan
- Southwest Petroleum University; College of Chemistry and Chemical Engineering; No. 8 Xindu Avenue 610500 Chengdu China
| | - Peiyao Zhu
- Southwest Petroleum University; College of Chemistry and Chemical Engineering; No. 8 Xindu Avenue 610500 Chengdu China
| | - Jihe Zhao
- Southwest Petroleum University; College of Chemistry and Chemical Engineering; No. 8 Xindu Avenue 610500 Chengdu China
| | - Baogang Wang
- Southwest Petroleum University; College of Chemistry and Chemical Engineering; No. 8 Xindu Avenue 610500 Chengdu China
| | - Hongsheng Lu
- Southwest Petroleum University; College of Chemistry and Chemical Engineering; No. 8 Xindu Avenue 610500 Chengdu China
- Ministry of Education; Engineering Research Center of Oilfield Chemistry; No. 8 Xindu Avenue 610500 Chengdu China
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29
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Wang Y, Ye Z. Synthesis and properties of double-chain single-head acetamidinium bicarbonate switchable surfactants. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1468268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Yun Wang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, P. R. China
| | - Zhiwen Ye
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, P. R. China
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30
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Jia K, Zhang X, Zhang L, Yu L, Wu Y, Li L, Mai Y, Liao B. Photoinduced Reconfiguration of Complex Emulsions Using a Photoresponsive Surfactant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11544-11552. [PMID: 30184432 DOI: 10.1021/acs.langmuir.8b02456] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Photoresponsive complex emulsions are prepared in a three-phase system consisting of two oils: hexane (H) and perfluorooctane (F). An aqueous solution of a mixed surfactant of fluorosurfactant, F(CF2) x(CH2CH2O) yH (Zonyl FS-300), and a synthesized light-responsive surfactant, 2-(4-(4-butylphenyl)diazenylphenoxy)ethyltrimethylammonium bromide (C4AZOC2TAB) was employed as the continuous phase. Complex emulsions with various geometries were prepared by one-step vortex mixing and a temperature-induced phase-separation method. It was noticed that the topology of the complex emulsion was highly dependent on the mass ratio of Zonyl FS-300/C4AZOC2TAB. Light microscopy images showed that phase inversion from an H/F/W- to an F/H/W-type double emulsion via a Janus emulsion was achieved by gradually increasing the mass ratio of C4AZOC2TAB/Zonyl FS-300. Upon UV/blue light irradiation, the topology of complex emulsions was turned to switch from an F/H/W double emulsion to a Janus emulsion to an entirely inverted H/F/W double emulsion. Dynamic interfacial tension measurements showed that UV irradiation of the interface between an aqueous trans-C4AZOC2TAB solution and hexane brings about an increase in the interfacial tension, suggesting the nature of photoinduced morphological changes in complex emulsions. The reconfiguration process of complex emulsions was illustrated by the Marangoni effect based on heterogeneity in the interfacial tension at the complex emulsion surface induced by controlling the molecular conversion of C4AZOC2TAB using light irradiation. Finally, we used the complex emulsions structure to form an on-off switch to start and shut off the evaporation of one volatile phase to achieve process monitoring. This could be used to initiate and quench a reaction, which offers a novel idea for achieving switchable and reversible reaction control in multiple-phase reactions.
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Affiliation(s)
- Kangle Jia
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Xiong Zhang
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Lei Zhang
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Longfei Yu
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Yuchao Wu
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Li Li
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Yuliang Mai
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Bing Liao
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
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31
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Wang J, Wang H, Li Y, Tian L, Chen S, Liu Q, Guo Z. Formation and CO2/N2 Switchable Ability of a Novel Copolymer Poly(N,N-Diethylaminoethyl Methacrylate-co-Sodium Vinylsulfonate). POLYMER SCIENCE SERIES A 2018. [DOI: 10.1134/s0965545x18050139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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32
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Hu J, Li X, Dong J. Development of Highly Efficient Oil-Water Separation Carbon Nanotube Membranes with Stimuli-Switchable Fluxes. ACS OMEGA 2018; 3:6635-6641. [PMID: 31458838 PMCID: PMC6644334 DOI: 10.1021/acsomega.8b00641] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 06/01/2018] [Indexed: 05/21/2023]
Abstract
In this work, a carbon nanotube (CNT)-based membrane [(4-((4-((11-ferroceneundecyl)oxy)phenyl)diazenyl)phenoxy)-diethylene triamine (FADETA)/polyethyleneimine (PEI)-decorated CNT membrane] with stimuli-switchable separation fluxes was developed. The multiwalled CNTs were modified by a pH-, light-, and redox stimuli-responsive surfactant FADETA initially, and then the FADETA-decorated CNTs were further cross-linked by PEI and finally coated on the polypropylene membrane. Interestingly, the particular membrane was successfully applied in emulsion systems to separate oil and water with high efficiency. First, the FADETA-/PEI-decorated CNT membrane showed highly porous microstructural characteristics owing to the overlapped and cross-linked CNTs as confirmed by the scanning electron microscopy observation. Then, it showed strong hydrophilicity to water in the air and high oleophobicity to oil underwater, thereby endowing the membrane with the potential to separate oil and water. Owing to the modified multiple stimuli-responsive FADETA on CNTs, the separation fluxes were stimuli-switchable, which could be adjusted reversibly by environmental factors including pH, light, and redox.
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Affiliation(s)
- Junwen Hu
- College of Chemistry and
Molecular
Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Xuefeng Li
- College of Chemistry and
Molecular
Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Jinfeng Dong
- College of Chemistry and
Molecular
Sciences, Wuhan University, Wuhan 430072, P. R. China
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33
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Hao L, Yegin C, Chen IC, Oh JK, Liu S, Scholar E, Zhang L, Akbulut M, Jiang B. pH-Responsive Emulsions with Supramolecularly Assembled Shells. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00984] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Li Hao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843-3122, United States
| | - Cengiz Yegin
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3003, United States
| | - I-Cheng Chen
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843-3122, United States
| | - Jun Kyun Oh
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843-3122, United States
| | - Shuhao Liu
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3003, United States
| | - Ethan Scholar
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843-3122, United States
| | - Luhong Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Mustafa Akbulut
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843-3122, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3003, United States
- Texas A&M Energy Institute, Texas A&M University, College Station, Texas 77843-3372, United States
| | - Bin Jiang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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34
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Tabor RF, McCoy TM, Hu Y, Wilkinson BL. Physicochemical and Biological Characterisation of Azobenzene-Containing Photoswitchable Surfactants. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20180024] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Rico F. Tabor
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Thomas M. McCoy
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Yingxue Hu
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Brendan L. Wilkinson
- School of Science and Technology, University of New England, Armidale, New South Wales 2351, Australia
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35
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Schnurbus M, Stricker L, Ravoo BJ, Braunschweig B. Smart Air-Water Interfaces with Arylazopyrazole Surfactants and Their Role in Photoresponsive Aqueous Foam. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6028-6035. [PMID: 29718669 PMCID: PMC5981290 DOI: 10.1021/acs.langmuir.8b00587] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 04/05/2018] [Indexed: 06/02/2023]
Abstract
A new light-switchable azo-surfactant arylazopyrazole tetraethylene glycol carboxylic acid (AAP-E4) was used as a molecular building block to functionalize macroscopic foams. AAP-E4 was studied in the bulk solution with UV/vis spectroscopy and at the interface with sum-frequency generation (SFG) as well as tensiometry. Additional foaming experiments were performed with a dynamic foam analyzer to study the role of AAP-E4 surfactants at the ubiquitous air-water interface as well as within macroscopic foam. In the bulk, it is possible to switch the AAP-E4 surfactant reversibly from trans to cis configurations and vice versa using 380 nm UV and 520 nm green light, respectively. At the interface, we demonstrate the excellent switching ability of AAP-E4 surfactants and a substantial modification of the surface tension. In addition, we show that the response of the interface is strongly influenced by lateral electrostatic interactions, which can be tuned by the charging state of AAP-E4. Consequently, the electrostatic disjoining pressure and thus the foam stability are highly dependent on the bulk pH and the charging state of the interface. For that reason, we have studied both the surface net charge (SFG) and the surface excess (tensiometry) as important parameters that determine foam stability in this system and show that neutral pH conditions lead to the optimal compromise between switching ability, surface excess, and surface charging. Measurements on the foam stability demonstrated that foams under irradiation with green light are more stable than foams irradiated with UV light.
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Affiliation(s)
- Marco Schnurbus
- Institute
of Physical Chemistry and Center for Soft Nanoscience, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Lucas Stricker
- Organic
Chemistry Institute and Center for Soft Nanoscience, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
| | - Bart Jan Ravoo
- Organic
Chemistry Institute and Center for Soft Nanoscience, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
| | - Björn Braunschweig
- Institute
of Physical Chemistry and Center for Soft Nanoscience, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
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36
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Guo H, Liu P, Li H, Cheng C, Gao Y. Responsive Emulsions Stabilized by Amphiphilic Supramolecular Graft Copolymers Formed in Situ at the Oil-Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5750-5758. [PMID: 29738255 DOI: 10.1021/acs.langmuir.8b00476] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Amphiphilic supramolecular graft copolymers which can stabilize oil-in-water (o/w) emulsions and enable responsive demulsification were demonstrated in this study. Linear poly[( N, N-dimethylacrylmide)- stat-(3-acrylamidophenylboronic acid)] (PDMA- stat-PAPBA) copolymers with phenylboronic acid (PBA) groups and linear polystyrene homopolymers with cis-diol terminals (PS(OH)2) were synthesized by reversible addition-fragmentation chain transfer polymerization. By the homogenization of the biphasic mixtures of an alkaline water solution of PDMA- stat-PAPBA copolymer and a toluene solution of PS(OH)2 homopolymer, stable o/w emulsions could be generated, although neither PDMA- stat-PAPBA nor PS(OH)2 alone was able to stabilize the emulsion. It was verified that the dispersed oil droplets in the emulsions were stabilized by the amphiphilic PDMA- stat-PAPBA- g-PS supramolecular graft copolymers, which were formed in situ at the oil-water interface by the complexation between the lateral PBA groups of PDMA- stat-PAPBA and the diol terminals of PS(OH)2 during homogenization. These emulsions showed pH- and glucose-responsive demulsification because of the reversible B-O bonds between the PDMA- stat-PAPBA backbones and the PS side chains. The effects of polymer concentrations on emulsion formation were also investigated. The current study provides an alternative method for the facile preparation of responsive polymeric emulsifiers, which potentially may be extended to other polymer pairs containing PBA and cis-diol groups.
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Affiliation(s)
| | | | | | - Chong Cheng
- Department of Chemical and Biological Engineering , University at Buffalo, The State University of New York , Buffalo , New York 14260 , United States
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37
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Peng J, Deng J, Huang X, Sun P, Deng W. Aggregation-Enhanced Emission of Fluorescent-Gemini Surfactants with High Photostability for Cell-Membrane Imaging. J SURFACTANTS DETERG 2018. [DOI: 10.1002/jsde.12036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jinwen Peng
- Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials; Guilin University of Technology; Guilin 541004 China
| | - Junjie Deng
- Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials; Guilin University of Technology; Guilin 541004 China
| | - Xuebing Huang
- Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials; Guilin University of Technology; Guilin 541004 China
| | - Pengfei Sun
- Key Laboratory for Organic Electronics & Information Displays, Institute of Advanced Materials; Nanjing University of Posts & Telecommunications; Nanjing 210046 China
| | - Weixing Deng
- Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials; Guilin University of Technology; Guilin 541004 China
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38
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Lv X, Liu L, Liu X, Ge Z, Zhong K. Reversibly Redox-Switchable Anionic Surfactant Contains Two Selenium Atoms. J SURFACTANTS DETERG 2018. [DOI: 10.1002/jsde.12026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Xiangliang Lv
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering; Jiangnan University; Wuxi 214122 China
| | - Lian Liu
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering; Jiangnan University; Wuxi 214122 China
| | - Xuefeng Liu
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering; Jiangnan University; Wuxi 214122 China
| | - Zan Ge
- Zanyu Technology Group Co. Ltd.; Hangzhou 310009 China
| | - Kai Zhong
- Zanyu Technology Group Co. Ltd.; Hangzhou 310009 China
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39
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Hu G, Yang H, Hou Q, Guo D, Chen G, Liu F, Chen T, Shi X, Su Y, Wang J. A pH and salt dually responsive emulsion in the presence of amphiphilic macromolecules. SOFT MATTER 2018; 14:405-410. [PMID: 29239453 DOI: 10.1039/c7sm01760j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A pH and salt dually responsive emulsion has been designed on the basis of a novel amphiphilic macromolecule. It was found that the water separation of an oil-in-water emulsion reached up to ∼60% after standing for 10 min at low pH. 2-(Diethylamino)ethyl methacrylate (DEA) residues were found to induce the macromolecules to protonate and to be hydrophilic at pH values between 2 and 6, resulting in dewetting from oil droplet surfaces in water. Besides, the macromolecules form aggregates with different structures at the water/oil interface, depending on the pH value or salt concentration of the emulsion system, enabling the system to be demulsified in response to the pH or salt stimulus. The experimental results also showed that with the addition of aluminium chloride at 100 mg L-1, the water separation was about 70% after 20 min. A possible mechanism with respect to demulsifying was proposed on the basis of an "ion bridge" among sodium acrylate (SA) residues, inducing the macromolecules to "cross-link" and become insoluble, and leading to oil/water separation. Furthermore, at a fixed pH of 5, addition of salt to the aqueous dispersion increased the degree of oil-water interfacial activity and batch emulsions were significantly unstable to coalesce at a low salinity of 25-50 mg L-1. This finding presents a new manipulation on emulsion stability and potential applications in the fields of oil recovery, wastewater treatment, sludge removal, and so on.
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Affiliation(s)
- Guangxin Hu
- School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China.
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40
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Fan Y, Zhang Y, Liu X, Zhong K, Ge Z. Recovery and Recycling of CO2/N2-Switchable Anionic Surfactants in Emulsions. J SURFACTANTS DETERG 2017. [DOI: 10.1007/s11743-017-2022-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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41
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Lei L, Xie D, Song B, Jiang J, Pei X, Cui Z. Photoresponsive Foams Generated by a Rigid Surfactant Derived from Dehydroabietic Acid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7908-7916. [PMID: 28735541 DOI: 10.1021/acs.langmuir.7b00934] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Innovation in the structure of surfactants is crucial to the construction of a surfactant-based system with intriguing properties. With dehydroabietic acid as a starting material, a nearly totally rigid azobenzene surfactant (R-azo-Na) was synthesized. The trans-R-azo-Na formed stable foams with half-lives of 636, 656, 976, and 872 min for 0.3, 1, 2, and 4 mmol·L-1 aqueous solutions, respectively. Under UV light irradiation, a fast collapse of the foams was observed, showing an in situ response. The excellent foam stability of trans-R-azo-Na leads to the extremely high photoresponsive efficiency. As revealed by dynamic surface tension and pulsed-field gradient NMR methods, an obvious energy barrier existed in the adsorption/desorption process of trans-R-azo-Na on the air/water interface. The foams formed by trans-R-azo-Na are thus stable against coarsening processes. The results reveal the unique photoresponsive behavior of a surfactant with a rigid hydrophobic skeleton and provide new insights into the structure causing aggregation of surfactants.
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Affiliation(s)
- Lan Lei
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University , Wuxi, Jiangsu 214122, China
| | - Danhua Xie
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry and Fujian Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University , Ningde, Fujian 352100, China
| | - Binglei Song
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University , Wuxi, Jiangsu 214122, China
| | - Jianzhong Jiang
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University , Wuxi, Jiangsu 214122, China
| | - Xiaomei Pei
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University , Wuxi, Jiangsu 214122, China
| | - Zhenggang Cui
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Materials Engineering, Jiangnan University , Wuxi, Jiangsu 214122, China
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42
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43
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Liu D, Suo Y, Tan J, Lu H. CO 2-Switchable microemulsion based on a pseudogemini surfactant. SOFT MATTER 2017; 13:3783-3788. [PMID: 28480931 DOI: 10.1039/c7sm00576h] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
At present, more and more researchers around the world are paying attention to stimuli-responsive surfactants. In this paper, we have reported a microemulsion prepared from the tertiary amine TMPDA (N,N,N',N'-tetramethyl-1,3-propanediamine) and the anionic surfactant SDS (sodium dodecyl sulphate), which has good carbon dioxide response characteristics. The molar ratio of TMPDA to SDS is 1 : 2. By introducing CO2 into the microemulsion that consists of SDS, TMPDA, n-hexane, n-butanol and water, the tertiary amine TMPDA molecules can be protonated to form quaternary ammonium species. The protonated tertiary amine TMPDA can be assembled with SDS by electrostatic interactions to form a pseudogemini surfactant (SDS-TMPDA-SDS). The pseudogemini surfactant can dissolve in the aqueous phase which makes the microemulsion break down eventually. By bubbling N2 after CO2 into the same system at 50 °C for 3 hours, the pseudogemini surfactant SDS-TMPDA-SDS disintegrates into SDS and TMPDA, respectively. At the same time, the microemulsion also recovers its initial state. Such a reversible transition could be repeated for several cycles from monophase to complete phase separation.
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Affiliation(s)
- Dongfang Liu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China.
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44
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Ren G, Wang L, Chen Q, Xu Z, Xu J, Sun D. pH Switchable Emulsions Based on Dynamic Covalent Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3040-3046. [PMID: 28282144 DOI: 10.1021/acs.langmuir.6b04546] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Dynamic covalent surfactants were designed to prepare pH switchable emulsions. A dynamic covalent bond between nonamphiphilic building blocks (polyethylenimine (PEI) and benzaldehyde (B)) was introduced to form the dynamic covalent surfactant PEI-B. The dynamic nature of covalent bond in PEI-B was confirmed by 1H NMR and fluorescence probe analysis. Stable emulsions were successfully prepared with interfacial active PEI-B at pH 7.8 with various water/paraffin oil ratios under sonication. When lowering the pH to 3.5, a complete phase separation was observed as a result of breaking dynamic covalent bond in the interfacial active PEI-B. After tuning the pH back to 7.8, stable emulsion was obtained again due to the reformation of the dynamic covalent bond and hence interfacial active PEI-B. The emulsification and demulsification were dependent on the formation and breaking of dynamic covalent bond in PEI-B. Such pH-triggered emulsification and demulsification can be switched at least three times. Application of dynamic covalent surfactants will open up a novel route for preparing responsive emulsions.
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Affiliation(s)
- Gaihuan Ren
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University , Jinan, Shandong 250100, People's Republic of China
| | - Lei Wang
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University , Jinan, Shandong 250100, People's Republic of China
| | - Qianqian Chen
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University , Jinan, Shandong 250100, People's Republic of China
| | - Zhenghe Xu
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta T6G 2 V4, Canada
- Institute of Nuclear and New Energy Technology, Tsinghua University , Beijing 1000084, People's Republic of China
| | - Jian Xu
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University , Jinan, Shandong 250100, People's Republic of China
| | - Dejun Sun
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University , Jinan, Shandong 250100, People's Republic of China
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45
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Yang R, Dong G, Liu Y, Zheng C, Wang D. Synthesis and Characterization of Photoresponsive Supramolecular Gel Formed by a Smart Surfactant. CHEM LETT 2017. [DOI: 10.1246/cl.161053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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46
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Kaneko S, Asakura K, Banno T. Phototactic behavior of self-propelled micrometer-sized oil droplets in a surfactant solution. Chem Commun (Camb) 2017; 53:2237-2240. [DOI: 10.1039/c6cc09236e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We demonstrate the phototactic behavior of self-propelled micrometer-sized oil droplets in a far-from-equilibrium state.
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Affiliation(s)
- Sho Kaneko
- Department of Applied Chemistry
- Faculty of Science and Technology
- Keio University
- Kohoku-ku
- Japan
| | - Kouichi Asakura
- Department of Applied Chemistry
- Faculty of Science and Technology
- Keio University
- Kohoku-ku
- Japan
| | - Taisuke Banno
- Department of Applied Chemistry
- Faculty of Science and Technology
- Keio University
- Kohoku-ku
- Japan
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47
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Wang P, Pei S, Wang M, Yan Y, Sun X, Zhang J. Coarse-grained molecular dynamics study on the self-assembly of Gemini surfactants: the effect of spacer length. Phys Chem Chem Phys 2017; 19:4462-4468. [DOI: 10.1039/c6cp07690d] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
This work provides a molecular-level understanding of the underlying mechanism of the self-assembly of Gemini surfactants.
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Affiliation(s)
- Pan Wang
- College of Science
- China University of Petroleum
- 266580 Qingdao
- People's Republic of China
- Key Laboratory of New Energy Physics & Materials Science in Universities of Shandong
| | - Shuai Pei
- College of Science
- China University of Petroleum
- 266580 Qingdao
- People's Republic of China
- Key Laboratory of New Energy Physics & Materials Science in Universities of Shandong
| | - Muhan Wang
- College of Science
- China University of Petroleum
- 266580 Qingdao
- People's Republic of China
- Key Laboratory of New Energy Physics & Materials Science in Universities of Shandong
| | - Youguo Yan
- College of Science
- China University of Petroleum
- 266580 Qingdao
- People's Republic of China
- Key Laboratory of New Energy Physics & Materials Science in Universities of Shandong
| | - Xiaoli Sun
- College of Science
- China University of Petroleum
- 266580 Qingdao
- People's Republic of China
| | - Jun Zhang
- College of Science
- China University of Petroleum
- 266580 Qingdao
- People's Republic of China
- Key Laboratory of New Energy Physics & Materials Science in Universities of Shandong
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48
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Zhang Y, Chen H, Liu X, Zhang Y, Fang Y, Qin Z. Effective and Reversible Switching of Emulsions by an Acid/Base-Mediated Redox Reaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:13728-13735. [PMID: 27958741 DOI: 10.1021/acs.langmuir.6b03645] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
To develop a fast, effective, and reversible strategy for phase separation and re-emulsification of the surfactant-based emulsions, a strategy for using acid/base-mediated redox reactions was established to switch the emulsions formed from a redox-responsive anionic surfactant of potassium dodecyl seleninate (C12SeO2K). Upon acidification, C12SeO2K was reduced by KI to give didodecyl diselenide (C12Se)2, a state of almost no surface or interfacial activity; upon basification, (C12Se)2 was oxidized by I2 to give C12SeO2K again. The fractional conversion of C12SeO2K in the reversible switching processes was close to 100%. Consequently, an unusually large change in interfacial tension (ΔIFT) as high as ∼27.1 mN m-1 was obtained at a wider concentration range starting from the critical micelle concentration of C12SeO2K; the highest IFT at the oil-water interface was obtained after an almost complete switch-off, giving an oil-aqueous solution interface very similar to that without any emulsifiers, which leads to the effective and fast phase separation of the C12SeO2K-based switchable emulsions.
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Affiliation(s)
- Yuandi Zhang
- School of Chemical & Materials Engineering, Key Laboratory of Food Colloids and Biotechnology Ministry of Education, Jiangnan University , Wuxi 214122, PR China
| | - Hui Chen
- School of Chemical & Materials Engineering, Key Laboratory of Food Colloids and Biotechnology Ministry of Education, Jiangnan University , Wuxi 214122, PR China
| | - Xuefeng Liu
- School of Chemical & Materials Engineering, Key Laboratory of Food Colloids and Biotechnology Ministry of Education, Jiangnan University , Wuxi 214122, PR China
| | - Yongmin Zhang
- School of Chemical & Materials Engineering, Key Laboratory of Food Colloids and Biotechnology Ministry of Education, Jiangnan University , Wuxi 214122, PR China
| | - Yun Fang
- School of Chemical & Materials Engineering, Key Laboratory of Food Colloids and Biotechnology Ministry of Education, Jiangnan University , Wuxi 214122, PR China
| | - Zhirong Qin
- Zhejiang Zanyu Technology Co. Ltd. , Hangzhou 310009, PR China
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49
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Xu P, Wang Z, Xu Z, Hao J, Sun D. Highly effective emulsification/demulsification with a CO 2 -switchable superamphiphile. J Colloid Interface Sci 2016; 480:198-204. [DOI: 10.1016/j.jcis.2016.07.023] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 07/13/2016] [Accepted: 07/13/2016] [Indexed: 01/19/2023]
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50
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Takahashi Y, Koizumi N, Kondo Y. Demulsification of Redox-Active Emulsions by Chemical Oxidation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:7556-7563. [PMID: 27402350 DOI: 10.1021/acs.langmuir.6b01772] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This article reports the influence of redox reactions on emulsions of n-octane and an aqueous solution of a ferrocene-containing surfactant (FTMA; (11-ferrocenylundecyl)trimethylammonium bromide). Above a certain surfactant concentration, stable O/W emulsions were formed from an aqueous solution of reduced FTMA; in contrast, mixtures of n-octane and an aqueous solution of oxidized FTMA did not form emulsions at any surfactant concentration. Furthermore, adding an oxidant to the stable O/W emulsions of reduced FTMA led to coalescence of the oil (octane) droplets in the emulsions, and subsequently, the oil and water (aqueous FTMA solution) phases fully separated from the emulsions, i.e., demulsification occurred. Equilibrated interfacial tension measurements indicate that oxidation of the ferrocenyl group in FTMA brings about an increase in the interfacial tension between the octane and aqueous surfactant solution phases. From these results, we concluded that the oxidation of reduced FTMA to oxidized FTMA led to the desorption of surfactant molecules adsorbed at the interface of the octane/aqueous surfactant solution, leading to demulsification.
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Affiliation(s)
- Yutaka Takahashi
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - Nanami Koizumi
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - Yukishige Kondo
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
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