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Nie C, Zhang Y, Du H, Han G, Yang J, Li L, HongjunWu, Wang B, Wang X. A Molecular modeling and Experimental Study of Solar Thermal Role on Interfacial Film of Emulsions for Elucidating and Executing Efficient Solar Demulsification. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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2
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Masrat R, Majid K. Solubilization of pyrene by mixed polymer-cationic/nonionic surfactant systems: Effect of polymer concentration. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Nie C, Han G, Ni J, Guan S, Du H, Zhang Y, Wang H. Stability Dynamic Characteristic of Oil-in-Water Emulsion from Alkali-Surfactant-Polymer Flooding. ACS OMEGA 2021; 6:19058-19066. [PMID: 34337244 PMCID: PMC8320156 DOI: 10.1021/acsomega.1c02367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 07/09/2021] [Indexed: 05/04/2023]
Abstract
The relationship model between the droplet lifetime and interface properties is established to characterize the stability of oil droplets, and then, the influence of the alkali-surfactant-polymer (ASP) concentration on the lifetime is analyzed by theoretical calculations. The stability dynamic characteristics of oil-in-water (O/W) emulsions from ASP flooding were evaluated using the emulsion stability model (Civan model) based on two-phase separation. The effect of ASP on dynamic characteristics of the emulsion was explored by analyzing film strength qualitatively and measuring interfacial tension and ζ potential. The results showed that the Civan model was suitable to evaluate the stability of the O/W emulsion and to obtain the corresponding dynamic characteristics. The O/W emulsions became more stable with the increasing alkali concentration first at a low alkali concentration (c NaOH < 200 mg/L) and then became less stable with the increasing alkali concentration at a high alkali concentration (c NaOH > 200 mg/L). The stabilities of O/W emulsions were improved with the increasing concentrations of the surfactant and polymer. The mechanism of stabilization of the O/W emulsion by ASP is as follows. The surface-active substances formed by the reaction of alkali and acidic substances in the oil phase, together with surfactants, adsorb at the oil-water interface, reducing the interfacial tension and increasing the strength of the oil-water interface film. The polymer only increases the strength of the interface film by increasing the viscoelasticity of the oil-water interface film.
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Pal N, Mandal A. Compositional simulation model and history-matching analysis of surfactant-polymer-nanoparticle (SPN) nanoemulsion assisted enhanced oil recovery. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.04.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Martinez RM, Magalhães WV, Sufi BDS, Padovani G, Nazato LIS, Velasco MVR, Lannes SCDS, Baby AR. Vitamin E-loaded bigels and emulsions: Physicochemical characterization and potential biological application. Colloids Surf B Biointerfaces 2021; 201:111651. [PMID: 33647710 DOI: 10.1016/j.colsurfb.2021.111651] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/12/2021] [Accepted: 02/16/2021] [Indexed: 10/22/2022]
Abstract
Bigels have been studied as topical formulations for its benefits over sensory and drug delivery parameters. However, there is still few evidences about the properties of the combination of organogelators, oily phases and bioactive molecules into rheological and stability behavior. We investigated the use of classical organogelators (candelilla wax and 12-hydroxystearic acid) and oily phases (sunflower and mineral oil) in 5/95 organogel/polymeric hydrogel ratio to compare vitamin E bigels with its corresponding emulsions. The rheological measurements, microstructure, physical and oxidative stability properties and biological behavior were evaluated. The obtained oil-in-water bigels and emulsions showed crystallization pattern at the interface with high thermal and centrifuge-stress stability. Viscoelastic weak gels were obtained with higher thixotropy and consistency of 12-hydroxystearic bigels. The diameter of the inner phase was increased by vitamin E, despite its little influence over physical and oxidative stability of bigels and emulsions. Those findings indicated that sensory attributes may be regulated by the organogel composition.
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Affiliation(s)
- Renata Miliani Martinez
- Department of Pharmacy, School of Pharmaceutical Sciences, University of São Paulo, 580 Prof. Lineu Prestes Av., Bl. 15, 05508-900, São Paulo, SP, Brazil.
| | - Wagner Vidal Magalhães
- Research & Development Laboratory - Chemyunion Ltd., 1501 Av. Independência, 18087-101, Sorocaba, SP, Brazil.
| | - Bianca da Silva Sufi
- Research & Development Laboratory - Chemyunion Ltd., 1501 Av. Independência, 18087-101, Sorocaba, SP, Brazil.
| | - Giovana Padovani
- Research & Development Laboratory - Chemyunion Ltd., 1501 Av. Independência, 18087-101, Sorocaba, SP, Brazil.
| | | | - Maria Valéria Robles Velasco
- Department of Pharmacy, School of Pharmaceutical Sciences, University of São Paulo, 580 Prof. Lineu Prestes Av., Bl. 15, 05508-900, São Paulo, SP, Brazil.
| | - Suzana Caetano da Silva Lannes
- Department of Pharmaceutical-Biochemical Technology, School of Pharmaceutical Sciences, University of São Paulo, 580 Prof. Lineu Prestes Av., Bl. 13, 05508-900, São Paulo, SP, Brazil.
| | - André Rolim Baby
- Department of Pharmacy, School of Pharmaceutical Sciences, University of São Paulo, 580 Prof. Lineu Prestes Av., Bl. 15, 05508-900, São Paulo, SP, Brazil.
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Tian C, Feng J, Prud'homme RK. Adsorption dynamics of polymeric nanoparticles at an air-water interface with addition of surfactants. J Colloid Interface Sci 2020; 575:416-424. [PMID: 32388288 DOI: 10.1016/j.jcis.2020.03.106] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 03/26/2020] [Accepted: 03/27/2020] [Indexed: 12/20/2022]
Abstract
HYPOTHESIS The unusual observation that addition of sodium dodecylsulfate surfactant to an aqueous nanoparticle dispersion slows down the decrease of air:water interfacial tension is attributed to the combined interactions of the nanoparticle with surfactant and surfactant at the air:water interface. Such dynamics are controlled by electrostatic interactions. EXPERIMENTS The study of dynamics is achieved using the maximum bubble pressure measurement of surface tension from 0.1 s to 30 s. The NPs are assembled by Flash NanoPrecipitation with 5 kDa polyethylene glycol coronas, and cores of polystyrene, polydimethylsiloxane, or polycaprolactone. Anionic (sodium dodecylsulfate), cationic (cetyltrimethylammonium bromide), and non-ionic (decaethylene glycol monododecyl ether) surfactants are employed over concentration 10-4 to 10-2 mM. The zeta potentials of the NPs are measured with surfactants. Electrostatic repulsion between charged NPs and interface is calculated, as well as the adsorption energy. FINDINGS This is the first report to quantitatively explain the effect of surfactants on the dynamics of NP assembly at an interface. An electrostatic energy barrier slows the adsorption kinetics for NPs when the NPs have the same charge as the interface. Increasing ionic strength of the solution reduces the electrostatic barrier. Decreasing interactions between the NP core material and the surfactant reduces the barrier. Our findings offer new insights into understanding of NP interfacial self-assembly dynamics in a complex environment.
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Affiliation(s)
- Chang Tian
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08540, United States.
| | - Jie Feng
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States.
| | - Robert K Prud'homme
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08540, United States.
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Tran E, Carpenter AP, Richmond GL. Probing the Molecular Structure of Coadsorbed Polyethylenimine and Charged Surfactants at the Nanoemulsion Droplet Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9081-9089. [PMID: 32668900 DOI: 10.1021/acs.langmuir.0c01095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Nanoemulsions, nanoscale oil droplets dispersed in an aqueous medium, can be stabilized by polymer-surfactant (PS) mixtures, making them ubiquitous in commercial, industrial, and pharmaceutical applications. It is well-known that the presence of PS layers coadsorbed at the droplet surface plays a significant role in droplet stability and functionality; however, little is understood about the molecular nature of this coadsorption. Such insights are especially important for application in drug delivery where physiological conditions can vary the environmental pH and significantly impact stabilization. Hence, the focus of this study examines the surface properties of ∼300 nm nanoemulsions stabilized by the coadsorption of polyethylenimine (PEI) and charged alkyl surfactants sodium dodecyl sulfate (SDS) and dodecyltrimethylammonium bromide (DTAB). PEI is a common charge-tunable polymer used in nanocarrier templates. This study employs vibrational sum frequency scattering spectroscopy, coupled with ζ-potential and surface pressure measurements performed as a function of varying concentrations and pH. The surface specific spectroscopic results reported herein reveal that PEI adsorption and molecular ordering is influenced by both electrostatic and hydrophobic interactions. While the degree of PEI adsorption is stronger in the presence of anionic SDS than cationic DTAB, for both surfactants, PEI is molecularly disordered in acidic conditions and adopts a persistent net ordering as the solution pH becomes more basic. Both surfactants also display degrees of interfacial conformational ordering that is altered by the presence of the coadsorbed polymer. These results demonstrate the molecular-level diversity in PEI behavior at the droplet interface and provide insight into how such behavior can be controlled to yield nanocarrier technology with specific functions and enhanced efficacy.
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Affiliation(s)
- Emma Tran
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Andrew P Carpenter
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Geraldine L Richmond
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
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Chen A, Li S, Xu J. A novel approach to study the interactions between polymeric stabilized micron-sized oil droplets by optical tweezers. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2019.12.010] [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]
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9
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Saffarionpour S. Preparation of Food Flavor Nanoemulsions by High- and Low-Energy Emulsification Approaches. FOOD ENGINEERING REVIEWS 2019. [DOI: 10.1007/s12393-019-09201-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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10
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Liang Y, Guo Y, Yang X, Feng R, Zhang X, Li H. Insights on the interaction between sodium dodecyl sulfate and partially hydrolyzed microblock hydrophobically associating polyacrylamides in different polymer concentration regimes. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.03.068] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Thermoresponsive polymer brushes on magnetic chitosan microspheres: Synthesis, characterization and application in oily water of high salinity. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.04.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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12
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Schabes BK, Hopkins EJ, Richmond GL. Molecular Interactions Leading to the Coadsorption of Surfactant Dodecyltrimethylammonium Bromide and Poly(styrenesulfonate) at the Oil/Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7268-7276. [PMID: 31083894 DOI: 10.1021/acs.langmuir.9b00873] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The strong synergistic adsorption of mixed polymer/surfactant (P/S) systems at the oil/water interface shows promise for applications such as oil remediation and emulsion stabilization, especially with respect to the formation of tunable mesoscopic multilayers. There is some evidence that a combination of dodecyltrimethylammonium bromide (DTAB) and sodium poly(styrenesulfonate) (PSS) exhibits the adsorption of a secondary P/S layer, though the structure of this layer has long eluded researchers. The focus of this study is to determine whether the DTAB-assisted adsorption of PSS at the oil/water interface occurs as a single layer or with subsequent multilayers. The study presented uses vibrational sum-frequency spectroscopy and interfacial tensiometry to determine the degree of PSS adsorption and orientation of its charged groups relative to the interface at three representative concentrations of DTAB. At low and intermediate DTAB concentrations, a single mixed DTAB/PSS monolayer adsorbs at the oil/water interface. No PSS adsorbs above the system critical micelle concentration. The interfacial charge is found to be similar to that of P/S complexes solvated in the aqueous solution. The surface adsorbate and P/S complexes in the bulk both exhibit a charge inversion at around the same DTAB concentration. This study demonstrates the importance of techniques which can differentiate between coadsorbing species and calls into question current models of P/S adsorption at an oil/water interface.
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Affiliation(s)
- Brandon K Schabes
- Department of Chemistry and Biochemistry , University of Oregon , Eugene , Oregon 97403 , United States
| | - Emma J Hopkins
- Department of Chemistry and Biochemistry , University of Oregon , Eugene , Oregon 97403 , United States
| | - Geraldine L Richmond
- Department of Chemistry and Biochemistry , University of Oregon , Eugene , Oregon 97403 , United States
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Chen A, Li SW, Jing D, Xu JH. Interactions between colliding oil drops coated with non-ionic surfactant determined using optical tweezers. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.09.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Schabes BK, Altman RM, Richmond GL. Come Together: Molecular Details into the Synergistic Effects of Polymer–Surfactant Adsorption at the Oil/Water Interface. J Phys Chem B 2018; 122:8582-8590. [DOI: 10.1021/acs.jpcb.8b05432] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Brandon K. Schabes
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Rebecca M. Altman
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Geraldine L. Richmond
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
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Chen A, Li SW, Sang FN, Zeng HB, Xu JH. Interactions between micro-scale oil droplets in aqueous surfactant solution determined using optical tweezers. J Colloid Interface Sci 2018; 532:128-135. [PMID: 30077826 DOI: 10.1016/j.jcis.2018.07.116] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 07/26/2018] [Accepted: 07/27/2018] [Indexed: 01/09/2023]
Abstract
HYPOTHESIS The stability of the emulsions is crucial, which relies on a well-developed understanding of dynamic interaction forces between single dispersed droplets. In the previous studies, many interests focus on the oil droplets of size range of 20-200 µm. However, emulsion droplets with diameter below 10 µm are rarely mentioned, which is the size scale of real emulsion droplets in various applications, such as toners, spacers for liquid crystal displays, and materials in biomedical and biochemical analysis. The micro-scale droplets have many differences on the deformation, internal pressure and hydrodynamic effects. It is necessary to understand the interaction mechanisms between two real size scales of oil droplets for guiding practical production and application. EXPERIMENTS In this work, tetradecane was chosen as the model oil phase in all experiments. The interaction forces of two tetradecane droplets with the diameter of 5.0 µm in water in the presence of surfactant and salt solution were directly measured using optical tweezers. The force-distance curves were established, and the zeta potential of tetradecane droplets was studied using Zetasizer Nano ZSP. FINDINGS The absolute value of zeta potential of tetradecane droplets was found to decrease with the increase of salt concentration and increase with the increase of surfactant concentration. The repulsive force between two tetradecane droplets was found to decrease with the increase of salt concentration because the electrostatic double-layer force was suppressed gradually with the increase of salt concentration. The "hydrodynamic suction" effect during the process of retraction becomes more pronounced due to the corresponding increase in the hydrodynamic force with the increase of the approaching velocity between the tetradecane droplets. Furthermore, we found the existing model for the measurement of large droplets by atomic force microscope (AFM) is invalid for the measurement of micro-scale droplets by optical tweezers. The deformation of colliding micro-scale droplets can be safely ignored, which is quite different from the large droplets. Our results provide a useful method to study the interaction forces between micro-scale emulsion droplets with pN force resolution, and gives a deep insight of the stabilization mechanism of real size scale of O/W emulsions. These findings have significant implications on the stability of emulsions in many food, cosmetics, medicine, and advanced materials.
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Affiliation(s)
- An Chen
- The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China
| | - Shao-Wei Li
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China.
| | - Fu-Ning Sang
- The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China
| | - Hong-Bo Zeng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Jian-Hong Xu
- The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China.
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16
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Studies on the physicochemical properties of synthesized tailor-made gemini surfactants for application in enhanced oil recovery. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.03.037] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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The Use of Polymer and Surfactants for the Microencapsulation and Emulsion Stabilization. COLLOIDS AND INTERFACES 2017. [DOI: 10.3390/colloids1010003] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Mettu S, Berry JD, Dagastine RR. Charge and Film Drainage of Colliding Oil Drops Coated with the Nonionic Surfactant C 12E 5. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:4913-4923. [PMID: 28434231 DOI: 10.1021/acs.langmuir.6b04632] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The interaction forces between colliding tetradecane drops were measured in the presence of the nonionic surfactant pentaethylene glycol monododecyl ether (C12E5). The force behavior was measured in the range of premicellar compositions of the nonionic surfactant in various salt solutions and was consistent with the presence of a surface charge even though the surfactant was nonionic in nature. The surface potential of oil drops was found to decrease with an increase in C12E5 concentration. The measured electrophoretic mobilities and ζ potentials of emulsified tetradecane drops also decreased with an increase in the C12E5 concentration. The surface potential decreased with an increase in the electrolyte at a constant C12E5 concentration, further confirming the presence of a charged oil-water interface. In addition to the charging behavior, the nonequilibrium film drainage between the tetradecane drops coated with C12E5 was also measured. In contrast to some existing experiments in the literature, it was found that oil drops coated with the nonionic surfactant were stable against coalescence, even when the drops were deformed on the order of their radii. These findings have significant implications on the stability of emulsions in food, personal care, and detergent industries.
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Affiliation(s)
- Srinivas Mettu
- Particulate Fluids Processing Centre (PFPC) and Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
| | - Joseph D Berry
- Particulate Fluids Processing Centre (PFPC) and Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
| | - Raymond R Dagastine
- Particulate Fluids Processing Centre (PFPC) and Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
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19
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Helgeson ME. Colloidal behavior of nanoemulsions: Interactions, structure, and rheology. Curr Opin Colloid Interface Sci 2016. [DOI: 10.1016/j.cocis.2016.06.006] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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20
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Pan F, Lu Z, Tucker I, Hosking S, Petkov J, Lu JR. Surface active complexes formed between keratin polypeptides and ionic surfactants. J Colloid Interface Sci 2016; 484:125-134. [PMID: 27599381 DOI: 10.1016/j.jcis.2016.08.082] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 08/30/2016] [Accepted: 08/31/2016] [Indexed: 12/26/2022]
Abstract
Keratins are a group of important proteins in skin and hair and as biomaterials they can provide desirable properties such as strength, biocompatibility, and moisture regaining and retaining. The aim of this work is to develop water-soluble keratin polypeptides from sheep wool and then explore how their surface adsorption behaves with and without surfactants. Successful preparation of keratin samples was demonstrated by identification of the key components from gel electrophoresis and the reproducible production of gram scale samples with and without SDS (sodium dodecylsulphate) during wool fibre dissolution. SDS micelles could reduce the formation of disulphide bonds between keratins during extraction, reducing inter-molecular crosslinking and improving keratin polypeptide solubility. However, Zeta potential measurements of the two polypeptide batches demonstrated almost identical pH dependent surface charge distributions with isoelectric points around pH 3.5, showing complete removal of SDS during purification by dialysis. In spite of different solubility from the two batches of keratin samples prepared, very similar adsorption and aggregation behavior was revealed from surface tension measurements and dynamic light scattering. Mixing of keratin polypeptides with SDS and C12TAB (dodecyltrimethylammonium bromide) led to the formation of keratin-surfactant complexes that were substantially more effective at reducing surface tension than the polypeptides alone, showing great promise in the delivery of keratin polypeptides via the surface active complexes. Neutron reflection measurements revealed the coexistence of surfactant and keratin polypeptides at the interface, thus providing the structural support to the observed surface tension changes associated with the formation of the surface active complexes.
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Affiliation(s)
- Fang Pan
- Biological Physics Group, Schuster Building, Oxford Road, The University of Manchester, Manchester M13 9PL, UK
| | - Zhiming Lu
- Biological Physics Group, Schuster Building, Oxford Road, The University of Manchester, Manchester M13 9PL, UK
| | - Ian Tucker
- Unilever R&D Port Sunlight, Quarry Road East, Bebington, Wirral CH63 3JW, UK
| | - Sarah Hosking
- Unilever R&D Port Sunlight, Quarry Road East, Bebington, Wirral CH63 3JW, UK
| | - Jordan Petkov
- Unilever R&D Port Sunlight, Quarry Road East, Bebington, Wirral CH63 3JW, UK; Menara KLK 1, Jalan Pju 7/6, Mutiara Damansara, 47810, Petaling Jaya, Selangor 47800, Malaysia
| | - Jian R Lu
- Biological Physics Group, Schuster Building, Oxford Road, The University of Manchester, Manchester M13 9PL, UK.
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Penfold J, Thomas RK, Li PX, Tucker I, Petkov J, Petkova RE. Nature of the Intermicellar Interactions in Ethoxylated Polysorbate Surfactants with High Degrees of Ethoxylation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1319-1326. [PMID: 26785290 DOI: 10.1021/acs.langmuir.5b04642] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Ethoxylated polysorbate Tween nonionic surfactants are extensively used as foam and emulsion stabilizers and in aqueous solution form globular micelles. The ethoxylated polysorbate surfactants with higher degrees of ethoxylation than the Tween surfactants exhibit some interesting self-assembly properties. Small-angle neutron scattering, SANS, measurements have revealed intermicellar interactions which are more pronounced than the hard-sphere excluded volume interactions normally associated with nonionic surfactant micelles. The interactions are interpreted as arising from the partial charge on the ether oxygen of the ethylene oxide groups. This gives rise to an effective net negative charge on the micelles, which has been determined from the SANS data and zeta potential measurements. For degrees of ethoxylation of ⩽20, the effect is relatively small. The interaction increases with increasing ethoxylation such that for a degree of ethoxylation of 50 the interaction is comparable to that of ionic surfactant micelles. Unlike the intermicellar interaction in ionic surfactant micellar solutions, which results from the charge on the micelle arising from the partial binding of counterions, the interaction between ethoxthylated polysorbate surfactant micelles is unaffected by the addition of electrolyte.
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Affiliation(s)
- J Penfold
- Physical and Theoretical Chemistry Laboratory, Oxford University , South Parks Road, Oxford OX1 3QZ, U.K
- ISIS, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, U.K
| | - R K Thomas
- Physical and Theoretical Chemistry Laboratory, Oxford University , South Parks Road, Oxford OX1 3QZ, U.K
| | - P X Li
- ISIS, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, U.K
| | - I Tucker
- Unilever Research and Development Laboratory, Port Sunlight, Quarry Road East, Bebington, Wirral CH63 2JW, U.K
| | - J Petkov
- Unilever Research and Development Laboratory, Port Sunlight, Quarry Road East, Bebington, Wirral CH63 2JW, U.K
| | - R E Petkova
- Unilever Research and Development Laboratory, Port Sunlight, Quarry Road East, Bebington, Wirral CH63 2JW, U.K
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Sharipova A, Aidarova S, Grigoriev D, Mutalieva B, Madibekova G, Tleuova A, Miller R. Polymer–surfactant complexes for microencapsulation of vitamin E and its release. Colloids Surf B Biointerfaces 2016; 137:152-7. [DOI: 10.1016/j.colsurfb.2015.03.063] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 03/26/2015] [Accepted: 03/31/2015] [Indexed: 12/01/2022]
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Biocompatible long-sustained release oil-core polyelectrolyte nanocarriers: From controlling physical state and stability to biological impact. Adv Colloid Interface Sci 2015; 222:678-91. [PMID: 25453660 DOI: 10.1016/j.cis.2014.10.005] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 10/15/2014] [Accepted: 10/15/2014] [Indexed: 11/20/2022]
Abstract
It has been generally expected that the most applicable drug delivery system (DDS) should be biodegradable, biocompatible and with incidental adverse effects. Among many micellar aggregates and their mediated polymeric systems, polyelectrolyte oil-core nanocarriers have been found to successfully encapsulate hydrophobic drugs in order to target cells and avoid drug degradation and toxicity as well as to improve drug efficacy, its stability, and better intracellular penetration. This paper reviews recent developments in the formation of polyelectrolyte oil-core nanocarriers by subsequent multilayer adsorption at micellar structures, their imaging, physical state and stability, drug encapsulation and applications, in vitro release profiles and in vitro biological evaluation (cellular uptake and internalization, biocompatibility). We summarize the recent results concerning polyelectrolyte/surfactant interactions at interfaces, fundamental to understand the mechanisms of formation of stable polyelectrolyte layered structures on liquid cores. The fabrication of emulsion droplets stabilized by synergetic surfactant/polyelectrolyte complexes, properties, and potential applications of each type of polyelectrolyte oil-core nanocarriers, including stealth nanocapsules with pegylated shell, are discussed and evaluated.
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Tucker I, Corbett J, Fatkin J, Jack R, Kaszuba M, MacCreath B, McNeil-Watson F. Laser Doppler Electrophoresis applied to colloids and surfaces. Curr Opin Colloid Interface Sci 2015. [DOI: 10.1016/j.cocis.2015.07.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Zhang H, Zeeb B, Salminen H, Weiss J. Isothermal titration calorimetric analysis on solubilization of an octane oil-in-water emulsion in surfactant micelles and surfactant–anionic polymer complexes. J Colloid Interface Sci 2015; 438:7-13. [DOI: 10.1016/j.jcis.2014.09.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 09/07/2014] [Accepted: 09/09/2014] [Indexed: 11/17/2022]
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Liu R, Pu W, Wang L, Chen Q, Li Z, Li Y, Li B. Solution properties and phase behavior of a combination flooding system consisting of hydrophobically amphoteric polyacrylamide, alkyl polyglycoside and n-alcohol at high salinities. RSC Adv 2015. [DOI: 10.1039/c5ra13865e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Application of polymer/surfactant (SP) combination flooding technique is attracting considerable interest in enhanced oil recovery (EOR).
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Affiliation(s)
- Rui Liu
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation
- Southwest Petroleum University
- Chengdu
- China
- Petroleum Engineering Institute
| | - Wanfen Pu
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation
- Southwest Petroleum University
- Chengdu
- China
- Petroleum Engineering Institute
| | - Lili Wang
- Changqing Oilfield Company Third Gas Production Plant
- Inner Mongolia 017300
- China
| | - Quansheng Chen
- Experimental Detection Research Institute
- Xinjiang Oilfield Branch Company
- PetroChina
- Karamay
- China
| | - Zhihong Li
- Experimental Detection Research Institute
- Xinjiang Oilfield Branch Company
- PetroChina
- Karamay
- China
| | - Yu Li
- CNOOC Energy Technology-Drilling & Production Co
- Tianjin 300458
- China
| | - Bin Li
- Petroleum Engineering Institute
- Southwest Petroleum University
- Chengdu
- China
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Zhou M, Wang W, Yang D, Qiu X. Preparation of a new lignin-based anionic/cationic surfactant and its solution behaviour. RSC Adv 2015. [DOI: 10.1039/c4ra10524a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The lignin-based cationic/anionic surfactant CA-SLs have a stronger ability to lower the surface tension at the air/water interface compared with SL–PEG, but a weaker one than CTAB.
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Affiliation(s)
- Mingsong Zhou
- State School of Chemistry and Chemical Engineering
- Key Lab of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou
- People's Republic of China
| | - Wenli Wang
- State School of Chemistry and Chemical Engineering
- Key Lab of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou
- People's Republic of China
| | - Dongjie Yang
- State School of Chemistry and Chemical Engineering
- Key Lab of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou
- People's Republic of China
| | - Xueqing Qiu
- State School of Chemistry and Chemical Engineering
- Key Lab of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou
- People's Republic of China
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Penfold J, Thomas RK. Neutron reflectivity and small angle neutron scattering: An introduction and perspective on recent progress. Curr Opin Colloid Interface Sci 2014. [DOI: 10.1016/j.cocis.2014.01.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hamedi-Shokrlu Y, Babadagli T. Stabilization of Nanometal Catalysts and Their Interaction with Oleic Phase in Porous Media during Enhanced Oil Recovery. Ind Eng Chem Res 2014. [DOI: 10.1021/ie4042033] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yousef Hamedi-Shokrlu
- Department of Civil and
Environmental Engineering, School of Mining and Petroleum Engineering, University of Alberta, 3-112 Markin CNRL-NREF, Edmonton, Alberta, Canada T6G 2W2
| | - Tayfun Babadagli
- Department of Civil and
Environmental Engineering, School of Mining and Petroleum Engineering, University of Alberta, 3-112 Markin CNRL-NREF, Edmonton, Alberta, Canada T6G 2W2
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Zhang H, Zeeb B, Salminen H, Feng F, Weiss J. Solubilization of octane in electrostatically-formed surfactant–polymer complexes. J Colloid Interface Sci 2014; 417:9-17. [DOI: 10.1016/j.jcis.2013.11.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2013] [Revised: 11/06/2013] [Accepted: 11/07/2013] [Indexed: 11/26/2022]
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Aidarova S, Sharipova A, Krägel J, Miller R. Polyelectrolyte/surfactant mixtures in the bulk and at water/oil interfaces. Adv Colloid Interface Sci 2014; 205:87-93. [PMID: 24268973 DOI: 10.1016/j.cis.2013.10.007] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 10/04/2013] [Accepted: 10/06/2013] [Indexed: 11/26/2022]
Abstract
Stabilization of emulsions by mixed polyelectrolyte/surfactant systems is a prominent example for the application in modern technologies. The formation of complexes between the polymers and the surfactants depends on the type of surfactant (ionic, non-ionic) and the mixing ratio. The surface activity (hydrophilic-lipophilic balance) of the resulting complexes is an important quantity for its efficiency in stabilizing emulsions. The interfacial adsorption properties observed at liquid/oil interfaces are more or less equivalent to those observed at the aqueous solution/air interface, however, the corresponding interfacial dilational and shear rheology parameters differ quite significantly. The interfacial properties are directly linked to bulk properties, which support the picture for the complex formation of polyelectrolyte/surfactant mixtures, which is the result of electrostatic and hydrophobic interactions. For long alkyl chain surfactants the interfacial behavior is strongly influenced by hydrophobic interactions while the complex formation with short chain surfactants is mainly governed by electrostatic interactions.
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Gao Y, Duc LT, Ali A, Liang B, Liang JT, Dhar P. Interface-induced disassembly of a self-assembled two-component nanoparticle system. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:3654-3661. [PMID: 23409958 DOI: 10.1021/la400062b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We present a study of static and dynamic interfacial properties of self-assembled polyelectrolyte complex nanoparticles (size 110-120 nm) containing entrapped surfactant molecules at a fluid/fluid interface. Surface tension vs time measurements of an aqueous solution of these polyelectrolyte complex nanoparticles (PCNs) show a concentration-dependent biphasic adsorption to the air/water interface while interfacial microrheology data show a concentration-dependent initial increase in the surface viscosity (up to 10(-7) N·m/s), followed by a sharp decrease (10(-9) N·m/s). Direct visualization of the air/water interface shows disappearance of particles from the interface over time. On the basis of these observations, we propose that the PCNs at fluid/fluid interfaces exist in two states: initial accumulation of PCNs at the air/water interface as nanoparticles, followed by interface induced disassembly of the accumulated PCNs into their components. The lack of change in particle size, charge, and viscosity of the bulk aqueous solution of PCNs with time indicates that this disintegration of the self-assembled PCNs is an interfacial phenomenon. Changes in energy encountered by the PCNs at the interface lead to instability of the self-assembled system and dissociation into its components. Such systems can be used for applications requiring directed delivery and triggered release of entrapped surfactants or macromolecules at fluid/fluid interfaces.
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Affiliation(s)
- Yan Gao
- Department of Chemical and Petroleum Engineering, The University of Kansas, Lawrence, Kansas 66046, USA
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