51
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Nourafkan E. Evaluation of adsorption of nonionic surfactants blend at water/oil interfaces. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2017.1381618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ehsan Nourafkan
- School of Chemical and Process Engineering, University of Leeds, Leeds, UK
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52
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D'Apolito R, Perazzo A, D'Antuono M, Preziosi V, Tomaiuolo G, Miller R, Guido S. Measuring Interfacial Tension of Emulsions in Situ by Microfluidics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4991-4997. [PMID: 29642699 DOI: 10.1021/acs.langmuir.8b00208] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Interfacial tension is a key parameter affecting industrially relevant properties of emulsions, such as morphology and stability. Although several methods are available to measure interfacial tension, they are based on generation of droplets starting from separate emulsion components and cannot directly probe the interfacial tension of an emulsion as such. Here, a novel microfluidic tensiometry device to measure interfacial tension of a water-in-oil emulsion in situ as a function of surfactant concentration is presented. In our approach, interfacial tension is obtained from a quantitative analysis of the deformation of individual emulsion droplets under steady state shear flow in microfluidic channels. The technique is validated by comparing the results with experimental data obtained by the pendant drop method in a broad range of interfacial tension values. A very good agreement is found, and an estimate of the surfactant critical micellar concentration (CMC) is also obtained. The proposed microfluidic setup can be used even at high surfactant concentrations, where the measurement is made more challenging by sample viscoelasticity, thus providing a powerful tool to determine the interfacial tension of complex systems in an extended concentration range. The technique could be also used for in-line monitoring of emulsion processing.
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Affiliation(s)
- Rosa D'Apolito
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale , Università di Napoli Federico II , Napoli , Italy
| | - Antonio Perazzo
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale , Università di Napoli Federico II , Napoli , Italy
| | - Mariapia D'Antuono
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale , Università di Napoli Federico II , Napoli , Italy
| | - Valentina Preziosi
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale , Università di Napoli Federico II , Napoli , Italy
| | - Giovanna Tomaiuolo
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale , Università di Napoli Federico II , Napoli , Italy
- CEINGE Biotecnologie avanzate, Napoli , Italy
| | - Reinhard Miller
- Max-Planck-Institut für Kolloid und Grenzflächenforschung, Am Mühlenberg 1 , 14476 Golm, Potsdam , Germany
| | - Stefano Guido
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale , Università di Napoli Federico II , Napoli , Italy
- CEINGE Biotecnologie avanzate, Napoli , Italy
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53
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Luft CM, Munusamy E, Pemberton JE, Schwartz SD. Molecular Dynamics Simulation of the Oil Sequestration Properties of a Nonionic Rhamnolipid. J Phys Chem B 2018; 122:3944-3952. [PMID: 29547289 DOI: 10.1021/acs.jpcb.7b11959] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A detailed molecular dynamics simulation study is presented on the behavior of aggregates composed of the nonionic monorhamnolipid α-rhamnopyranosyl-β-hydroxydecanoyl-β-hydroxydecanoate (Rha-C10-C10) and decane in bulk water. A graph theoretical approach was utilized to characterize the size and composition of the many aggregates generated in our simulations. Overall, we observe that the formation of oil in Rha-C10-C10 aggregates is a favorable process. Detailed analysis on the surfactant/oil aggregate shows that larger aggregates are stable. The shape and size of the aggregates are widely distributed, with the majority of the aggregates preferring ellipsoidal or cylindrical structures. Irrespective of the decane concentration in the system, we did not observe free decane in any of the simulations. Further insights into the binding energy of decane were carried out using free-energy perturbation calculations. The results showed that the trapped decane molecules provide stability to the Rha-C10-C10 aggregates of size N = 50 which are shown to be unstable in our previous study and allow for the growth of larger aggregates than pure Rha-C10-C10 in water. The density profile plots show that decane molecules encapsulated inside the aggregate preferred to remain closer to the center of mass. This study points to the feasibility of using this biosurfactant as an environmental remediation agent.
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Affiliation(s)
- Charles M Luft
- Department of Chemistry and Biochemistry , University of Arizona , 1306 East University Blvd. , Tucson , Arizona 85721 , United States
| | - Elango Munusamy
- Department of Chemistry and Biochemistry , University of Arizona , 1306 East University Blvd. , Tucson , Arizona 85721 , United States
| | - Jeanne E Pemberton
- Department of Chemistry and Biochemistry , University of Arizona , 1306 East University Blvd. , Tucson , Arizona 85721 , United States
| | - Steven D Schwartz
- Department of Chemistry and Biochemistry , University of Arizona , 1306 East University Blvd. , Tucson , Arizona 85721 , United States
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54
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Preziosi V, Perazzo A, Tomaiuolo G, Guido S. The effect of flow on viscoelastic emulsion microstructure. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2018; 41:45. [PMID: 29589210 DOI: 10.1140/epje/i2018-11652-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 03/13/2018] [Indexed: 06/08/2023]
Abstract
Emulsions made of oil, water and surfactants are widespread soft materials with complex structures depending on composition and temperature. Emulsion phase behavior at rest has been widely investigated but flow-induced effects, which are very relevant in many applications, can still be further explored towards improved emulsion microstructural design. In this work, we use low energy emulsification processing to create small-sized emulsions. In a previous report, we showed the emulsion morphology development and the effect of flow on the microstructure of a highly viscoelastic attractive emulsion which result in a concentrated nanoemulsion after viscoelastic droplet filaments are disrupted. Here, we show that upon stopping the flow, the filaments slowly buckle, recoil and finally form clusters of randomly flocculated droplets. We thus obtain two completely different emulsion morphologies simply induced by the action of flow, where in both cases attractive interactions play a key role. The emulsion high interfacial area represents a valuable feature for several applications such as upstream operations, microreaction media and drug delivery.
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Affiliation(s)
- Valentina Preziosi
- Department of Chemical, Materials and Production Engineering, University of Napoli Federico II, 80125, Napoli, Italy.
| | - Antonio Perazzo
- Department of Chemical, Materials and Production Engineering, University of Napoli Federico II, 80125, Napoli, Italy
| | - Giovanna Tomaiuolo
- Department of Chemical, Materials and Production Engineering, University of Napoli Federico II, 80125, Napoli, Italy
- CEINGE, Advanced Biotechnologies, 80145, Napoli, Italy
| | - Stefano Guido
- Department of Chemical, Materials and Production Engineering, University of Napoli Federico II, 80125, Napoli, Italy
- CEINGE, Advanced Biotechnologies, 80145, Napoli, Italy
- National Interuniversity Consortium for Materials Science and Technology (INSTM), 50121, Firenze, Italy
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55
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Tripathi S, Bhattacharya A, Singh R, Tabor RF. Rheological behavior of high internal phase water-in-oil emulsions: Effects of droplet size, phase mass fractions, salt concentration and aging. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.09.016] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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56
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Design of pH-responsive “on-off” emulsions using CTAB/PPA emulsifiers by simulations and experiments. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.08.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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57
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Sazalee SA, Ahmad N, Hashim R. Investigation of self-assembly properties and the effect of tween series co-surfactants on the stability of nonionic branched-chain glycolipid hexosomes. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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58
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Preziosi V, Perazzo A, Tomaiuolo G, Pipich V, Danino D, Paduano L, Guido S. Flow-induced nanostructuring of gelled emulsions. SOFT MATTER 2017; 13:5696-5703. [PMID: 28744531 DOI: 10.1039/c7sm00646b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Although the phase behavior of emulsions has been thoroughly investigated, the effect of flow on emulsion morphology, which is relevant for many applications, is far from being fully elucidated. Here, we investigate an emulsion based on two common nonionic surfactants in a range of water concentration where complex and diverse microstructures are found at rest, such as multilamellar and bicontinuous phases. In spite of such complexity, once subjected to shear flow, all the emulsions investigated are characterized by thinning filaments which eventually break up into a concentrated suspension of micro-sized water-based droplets dispersed in a continuous oil phase. The so-formed droplets tend to align in string-like structures. The emulsions exhibit a yield stress, whose value can be estimated by the plug-core velocity profiles in pressure-driven capillary flow, thus providing evidence of weakly attractive interdroplet interactions. The latter are consistent with droplet clustering and percolation observed at rest. These results can also be relevant to the flow behavior of other liquid-liquid systems, such as polymer blends, where the flow-induced microstructure is under debate as well.
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Affiliation(s)
- Valentina Preziosi
- Department of Chemical, Materials and Production Engineering, University of Napoli Federico II, 80125 Napoli, Italy.
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59
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Nourafkan E, Asachi M, Gao H, Raza G, Wen D. Synthesis of stable iron oxide nanoparticle dispersions in high ionic media. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2017.01.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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60
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Liuzzi R, Preziosi V, Caserta S, Guido S. Development of model systems for in vitro investigation of transdermal transport pathways. CAN J CHEM ENG 2017. [DOI: 10.1002/cjce.22835] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Roberta Liuzzi
- Dipartimento di Ingegneria Chimica dei Materiali e della Produzione Industriale (DICMAPI) Università di Napoli Federico II. P. le Tecchio; 80, 80125 Napoli Italy
- CEINGE Biotecnologie Avanzate; via Gaetano Salvatore, 486; 80145 Napoli Naples Italy
| | - Valentina Preziosi
- Dipartimento di Ingegneria Chimica dei Materiali e della Produzione Industriale (DICMAPI) Università di Napoli Federico II. P. le Tecchio; 80, 80125 Napoli Italy
- CEINGE Biotecnologie Avanzate; via Gaetano Salvatore, 486; 80145 Napoli Naples Italy
| | - Sergio Caserta
- Dipartimento di Ingegneria Chimica dei Materiali e della Produzione Industriale (DICMAPI) Università di Napoli Federico II. P. le Tecchio; 80, 80125 Napoli Italy
- CEINGE Biotecnologie Avanzate; via Gaetano Salvatore, 486; 80145 Napoli Naples Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM); UdR INSTM Napoli Federico II; P. le Tecchio, 80 80125 Napoli Italy
| | - Stefano Guido
- Dipartimento di Ingegneria Chimica dei Materiali e della Produzione Industriale (DICMAPI) Università di Napoli Federico II. P. le Tecchio; 80, 80125 Napoli Italy
- CEINGE Biotecnologie Avanzate; via Gaetano Salvatore, 486; 80145 Napoli Naples Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM); UdR INSTM Napoli Federico II; P. le Tecchio, 80 80125 Napoli Italy
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61
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Busatto CA, Labie H, Lapeyre V, Auzely-Velty R, Perro A, Casis N, Luna J, Estenoz DA, Ravaine V. Oil-in-microgel strategy for enzymatic-triggered release of hydrophobic drugs. J Colloid Interface Sci 2017; 493:356-364. [PMID: 28126608 DOI: 10.1016/j.jcis.2017.01.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 01/06/2017] [Accepted: 01/09/2017] [Indexed: 01/28/2023]
Abstract
Polymer microgels have received considerable attention due to their great potential in the biomedical field as drug delivery systems. Hyaluronic acid (HA) is a naturally occurring glycosaminoglycan composed of N-acetyl-d-glucosamine and d-glucuronic acid. This polymer is biodegradable, nontoxic, and can be chemically modified. In this work, a co-flow microfluidic strategy for the preparation of biodegradable HA microgels encapsulating hydrophobic drugs is presented. The approach relies on: (i) generation of a primary oil-in-water (O/W) nanoemulsion by the ultrasonication method, (ii) formation of a double oil-in-water-in-oil emulsion (O/W/O) using microfluidics, and (iii) cross-linking of microgels by photopolymerization of HA precursors modified with methacrylate groups (HA-MA) present in the aqueous phase of the droplets. The procedure is used for the encapsulation and controlled release of progesterone. Degradability and encapsulation/release studies in PBS buffer at 37°C in presence of different concentrations of hyaluronidase are performed. It is demonstrated that enzymatic degradation can be used to trigger the release of progesterone from microgels. This method provides precise control of the release system and can be applied for the encapsulation and controlled release of different types of hydrophobic drugs.
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Affiliation(s)
- C A Busatto
- Instituto de Desarrollo Tecnológico para la Industria Química, INTEC (Universidad Nacional del Litoral and CONICET), Güemes 3450, 3000 Santa Fe, Argentina
| | - H Labie
- Université de Bordeaux, Bordeaux INP, ISM, UMR 5255, Site ENSCBP, 16 avenue Pey Berland, 33607 Pessac, France
| | - V Lapeyre
- Université de Bordeaux, Bordeaux INP, ISM, UMR 5255, Site ENSCBP, 16 avenue Pey Berland, 33607 Pessac, France
| | - R Auzely-Velty
- Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), affiliated with Université Joseph Fourier, 601 rue de la Chimie, 38041 Grenoble, France
| | - A Perro
- Université de Bordeaux, Bordeaux INP, ISM, UMR 5255, Site ENSCBP, 16 avenue Pey Berland, 33607 Pessac, France
| | - N Casis
- Instituto de Desarrollo Tecnológico para la Industria Química, INTEC (Universidad Nacional del Litoral and CONICET), Güemes 3450, 3000 Santa Fe, Argentina
| | - J Luna
- Instituto de Desarrollo Tecnológico para la Industria Química, INTEC (Universidad Nacional del Litoral and CONICET), Güemes 3450, 3000 Santa Fe, Argentina
| | - D A Estenoz
- Instituto de Desarrollo Tecnológico para la Industria Química, INTEC (Universidad Nacional del Litoral and CONICET), Güemes 3450, 3000 Santa Fe, Argentina
| | - V Ravaine
- Université de Bordeaux, Bordeaux INP, ISM, UMR 5255, Site ENSCBP, 16 avenue Pey Berland, 33607 Pessac, France.
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62
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Bagheri A, Khalili P. Synergism between non-ionic and cationic surfactants in a concentration range of mixed monolayers at an air–water interface. RSC Adv 2017. [DOI: 10.1039/c6ra27382c] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The mole fractions of TX100 (Xs1) and C16PC (Xs2) at the interface vs. the total surfactant concentrations in the pre-micellar region, C12, at various bulk mole fractions (y1): (●) 0.1093, (□) 0.1995, (▲) 0.2901, (+) 0.3777 (*) 0.5001 and (○) 0.5972.
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63
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Raikos V, Duthie G, Ranawana V. Comparing the efficiency of different food-grade emulsifiers to form and stabilise orange oil-in-water beverage emulsions: influence of emulsifier concentration and storage time. Int J Food Sci Technol 2016. [DOI: 10.1111/ijfs.13286] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Vassilios Raikos
- Rowett Institute of Nutrition and Health; University of Aberdeen; Scotland AB25 2ZD UK
| | - Garry Duthie
- Rowett Institute of Nutrition and Health; University of Aberdeen; Scotland AB25 2ZD UK
| | - Viren Ranawana
- Rowett Institute of Nutrition and Health; University of Aberdeen; Scotland AB25 2ZD UK
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64
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Liuzzi R, Gallier S, Ringler S, Caserta S, Guido S. Visualization of choline-based phospholipids at the interface of oil/water emulsions with TEPC-15 antibody. Immunofluorescence applied to colloidal systems. RSC Adv 2016. [DOI: 10.1039/c6ra13775j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Phospholipids, which are amphiphilic biomolecules composed of a polar head group and two nonpolar fatty acid tails, play a central role in cellular and body functions.
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Affiliation(s)
- R. Liuzzi
- Dipartimento di Ingegneria Chimica dei Materiali e della Produzione Industriale (DICMAPI)
- Università di Napoli Federico II
- Napoli
- Italy
| | - S. Gallier
- Danone Nutricia Research
- Utrecht 3584 CT
- The Netherlands
| | - S. Ringler
- Danone Nutricia Research
- Utrecht 3584 CT
- The Netherlands
| | - S. Caserta
- Dipartimento di Ingegneria Chimica dei Materiali e della Produzione Industriale (DICMAPI)
- Università di Napoli Federico II
- Napoli
- Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM)
| | - S. Guido
- Dipartimento di Ingegneria Chimica dei Materiali e della Produzione Industriale (DICMAPI)
- Università di Napoli Federico II
- Napoli
- Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM)
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