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Koroleva M. Multicompartment colloid systems with lipid and polymer membranes for biomedical applications. Phys Chem Chem Phys 2023; 25:21836-21859. [PMID: 37565484 DOI: 10.1039/d3cp01984e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
Multicompartment structures have the potential for biomedical applications because they can act as multifunctional systems and provide simultaneous delivery of drugs and diagnostics agents of different types. Moreover, some of them mimic biological cells to some extent with organelles as separate sub-compartments. This article analyses multicompartment colloidal structures with smaller sub-units covered with lipid or polymer membranes that provide additional protection for the encapsulated substances. Vesosomes with small vesicles encapsulated in the inner pools of larger liposomes are the most studied systems to date. Dendrimer molecules are enclosed by a lipid bilayer shell in dendrosomes. Capsosomes, polymersomes-in-polymer capsules, and cubosomes-in-polymer capsules are composed of sub-compartments encapsulated within closed multilayer polymer membranes. Janus or Cerberus emulsions contain droplets composed of two or three phases: immiscible oils in O/W emulsions and aqueous polymer or salt solutions that are separated into two or three phases and form connected droplets in W/O emulsions. In more cases, the external surface of engulfed droplets in Janus or Cerberus emulsions is covered with a lipid or polymer monolayer. eLiposomes with emulsion droplets encapsulated into a bilayer shell have been given little attention so far, but they have very great prospects. In addition to nanoemulsion droplets, solid lipid nanoparticles, nanostructured lipid carriers and inorganic nanoparticles can be loaded into eLiposomes. Molecular engineering of the external membrane allows the creation of ligand-targeted and stimuli-responsive multifunctional systems. As a result, the efficacy of drug delivery can be significantly enhanced.
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Affiliation(s)
- Marina Koroleva
- Mendeleev University of Chemical Technology, Miusskaya sq. 9, Moscow 125047.
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2
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Vidallon MLP, Teo BM, Bishop AI, Tabor RF. Next-Generation Colloidal Materials for Ultrasound Imaging Applications. ULTRASOUND IN MEDICINE & BIOLOGY 2022; 48:1373-1396. [PMID: 35641393 DOI: 10.1016/j.ultrasmedbio.2022.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 03/31/2022] [Accepted: 04/03/2022] [Indexed: 06/15/2023]
Abstract
Ultrasound has important applications, predominantly in the field of diagnostic imaging. Presently, colloidal systems such as microbubbles, phase-change emulsion droplets and particle systems with acoustic properties and multiresponsiveness are being developed to address typical issues faced when using commercial ultrasound contrast agents, and to extend the utility of such systems to targeted drug delivery and multimodal imaging. Current technologies and increasing research data on the chemistry, physics and materials science of new colloidal systems are also leading to the development of more complex, novel and application-specific colloidal assemblies with ultrasound contrast enhancement and other properties, which could be beneficial for multiple biomedical applications, especially imaging-guided treatments. In this article, we review recent developments in new colloids with applications that use ultrasound contrast enhancement. This work also highlights the emergence of colloidal materials fabricated from or modified with biologically derived and bio-inspired materials, particularly in the form of biopolymers and biomembranes. Challenges, limitations, potential developments and future directions of these next-generation colloidal systems are also presented and discussed.
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Affiliation(s)
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, Victoria, Australia
| | - Alexis I Bishop
- School of Physics and Astronomy, Monash University, Clayton, Victoria, Australia
| | - Rico F Tabor
- School of Chemistry, Monash University, Clayton, Victoria, Australia.
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Demulsification of (W1+W2+W3)/O Reverse Cerberus Emulsion from Vibrational Emulsification. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Wei D, Jin H, Ge L, Nie G, Guo R. Construction and regulation of aqueous-based Cerberus droplets by vortex mixing. J Colloid Interface Sci 2022; 627:194-204. [DOI: 10.1016/j.jcis.2022.06.178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 06/17/2022] [Accepted: 06/30/2022] [Indexed: 11/26/2022]
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5
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Zhang H, Ge L, Ding C, Guo R. Magnetic response Janus emulsions stabilized by Mangeto-surfactant. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Poloxamer 407-Based Thermosensitive Emulgel as a Novel Formulation Providing a Controlled Release of Oil-Soluble Pharmaceuticals-Ibuprofen Case Study. MATERIALS 2021; 14:ma14237266. [PMID: 34885421 PMCID: PMC8658182 DOI: 10.3390/ma14237266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 01/25/2023]
Abstract
This article covers the design and evaluation of a novel drug vehicle: a thermosensitive, injectable, high-oil-content (50% w/w) emulgel providing a controlled release of lipophilic pharmaceuticals. Different vegetable (castor, canola, olive, peanut, grapeseed, linseed), mineral (paraffin) and semisynthetic (isopropyl myristate, oleic acid) oils were screened for ibuprofen (IBU) solubility and for their capacity for high-shear emulsification in a 17% (w/w) aqueous solution of poloxamer 407. Chosen emulgels were subject to a rheological evaluation, a syringeability test (TA.XT texture analyser; 2 mL syringe; 18 G, 20 G and 22 G needles) and a drug release study (48 h; cellulose membrane; 0.05 mol/L phosphate buffer at pH 7.4). Castor oil turned out to be an optimal component for IBU incorporation. Blank and drug-loaded castor oil emulgels were susceptible to administration via a syringe and needle, with the absolute injection force not exceeding 3 kg (29.4 N). The drug release test revealed dose-dependent, quasi-linear kinetics, with up to 44 h of controlled, steady, linear release. The results indicate the significant potential of high-oil-content, oil-in-water thermosensitive emulgel formulations as vehicles for the controlled release of lipophilic APIs.
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Liu Y, Banerjee A, Eryazici I, Zimmerman B, Reil J, Katzenstein JM. The invisible arbiter of emulsion structure: insight from an examination of two types of 3-phase emulsions. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1984249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Yihan Liu
- Research and Development, Performance Silicones, Dow Inc., Auburn, Michigan, USA
| | - Anirudha Banerjee
- Research and Development, Performance Silicones, Dow Inc., Auburn, Michigan, USA
| | - Ibrahim Eryazici
- Research and Development, Coating Materials, Dow Inc., Collegeville, Pennsylvania, USA
| | - Brett Zimmerman
- Research and Development, Performance Silicones, Dow Inc., Auburn, Michigan, USA
| | - Jennifer Reil
- Research and Development, Performance Silicones, Dow Inc., Auburn, Michigan, USA
| | - Joshua M. Katzenstein
- Research and Development, Performance Silicones, Dow Inc., Auburn, Michigan, USA
- L’Oreal, Clark, New Jersey, USA
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Song R, Cho S, Shin S, Kim H, Lee J. From shaping to functionalization of micro-droplets and particles. NANOSCALE ADVANCES 2021; 3:3395-3416. [PMID: 36133725 PMCID: PMC9419121 DOI: 10.1039/d1na00276g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 05/10/2021] [Indexed: 06/15/2023]
Abstract
The structure of microdroplet and microparticle is a critical factor in their functionality, which determines the distribution and sequence of physicochemical reactions. Therefore, the technology of precisely tailoring their shape is requisite for implementing the user demand functions in various applications. This review highlights various methodologies for droplet shaping, classified into passive and active approaches based on whether additional body forces are applied to droplets to manipulate their functions and fabricate them into microparticles. The passive approaches cover batch emulsification, solvent evaporation and diffusion, micromolding, and microfluidic methods. In active approaches, the external forces, such as electrical and magnetic fields or optical lithography, are applied to microdroplets. Special attention is also given to latest technologies using microdroplets and microparticles, especially in the fields of biological, optical, robotic, and environmental applications. Finally, this review aims to address the advantages and disadvantages of the introduced approaches and suggests the direction for further development in this field.
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Affiliation(s)
- Ryungeun Song
- School of Mechanical Engineering, Sungkyunkwan University Suwon 16419 Korea
| | - Seongsu Cho
- School of Mechanical Engineering, Sungkyunkwan University Suwon 16419 Korea
| | - Seonghun Shin
- School of Mechanical Engineering, Sungkyunkwan University Suwon 16419 Korea
| | - Hyejeong Kim
- School of Mechanical Engineering, Korea University Seoul 02841 Korea
| | - Jinkee Lee
- School of Mechanical Engineering, Sungkyunkwan University Suwon 16419 Korea
- Institute of Quantum Biophysics, Sungkyunkwan University Suwon 16419 Korea
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Saito N, Itoyama S, Takahashi R, Takahashi Y, Kondo Y. Synthesis and surface activity of photoresponsive hybrid surfactants containing both fluorocarbon and hydrocarbon chains. J Colloid Interface Sci 2021; 582:638-646. [PMID: 32911411 DOI: 10.1016/j.jcis.2020.08.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 08/11/2020] [Accepted: 08/12/2020] [Indexed: 12/14/2022]
Abstract
HYPOTHESIS Hybrid surfactants containing both alkyl and fluoroalkyl chains within the same molecule where modification of the azobenzene group will enable us to switch the superhydrophobic nature with an external light source, and the optical behavior will vary depending on the structure of the hydrophobic chains. EXPERIMENTS Surface activity and its optically-induced variation of the azobenzene-modified hybrid surfactants were characterized using the surface tensiometry, UV-vis and NMR spectroscopy and theoretical calculation. FINDINGS The hybrid surfactants are superhydrophobic in nature reducing the surface tension of water to near 20 mN/m. Photo-isomerization of the azobenzene group induces a drastic surface tension variation (Δγ), and particularly the compositions containing the octyl-fluorocarbon chain exhibit remarkable Δγ as much as 30 mN/m which is even higher than that of the conventional surfactants (Δγ ≈ 14-20 mN/m). Theoretical calculation suggests significantly higher hydrophilicity of the cis isomer, causing the drastic switch in the surface activity. These results indicate the promise of the hybrid surfactants as efficient surface/interface manipulators.
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Affiliation(s)
- Norio Saito
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan.
| | - Sekito Itoyama
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - Rieko Takahashi
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - Yutaka Takahashi
- New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai, Miyagi 980-8577, 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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Ku KH, Li J, Yoshinaga K, Swager TM. Dynamically Reconfigurable, Multifunctional Emulsions with Controllable Structure and Movement. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1905569. [PMID: 31639256 DOI: 10.1002/adma.201905569] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 10/05/2019] [Indexed: 05/20/2023]
Abstract
Dynamically reconfigurable oil-in-water (o/w) Pickering emulsions are developed, wherein the assembly of particles (i.e., platinum-on-carbon and iron-on-carbon particles) can be actively controlled by adjusting interfacial tensions. A balanced adsorption of particles and surfactants at the o/w interface allows for the creation of inhomogeneity of the particle distribution on the emulsion surface. Complex Pickering emulsions with highly controllable and reconfigurable morphologies are produced in a single step by exploiting the temperature-sensitive miscibility of hydrocarbon and fluorocarbon liquids. Dynamic adsorption/desorption of (polymer) surfactants afford both shape and configuration transitions of multiple Pickering emulsions and encapsulated core/shell structured can be transformed into a Janus configuration. Finally, to demonstrate the intrinsic catalytic or magnetic properties of the particles provided by carbon bound Pt and Fe nanoparticles, two different systems are investigated. Specifically, the creation of a bimetallic microcapsule with controlled payload release and precise modulation of translational and rotational motions of magnetic emulsions are demonstrated, suggesting potential applications for sensing and smart payload delivery.
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Affiliation(s)
- Kang Hee Ku
- Department of Chemistry, Massachusetts Institute of Technology (MIT), Cambridge, MA, 02139, USA
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Jie Li
- Department of Chemistry, Massachusetts Institute of Technology (MIT), Cambridge, MA, 02139, USA
| | - Kosuke Yoshinaga
- Department of Chemistry, Massachusetts Institute of Technology (MIT), Cambridge, MA, 02139, USA
| | - Timothy M Swager
- Department of Chemistry, Massachusetts Institute of Technology (MIT), Cambridge, MA, 02139, USA
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Ding C, Ge L, Jin H, Bian Q, Guo R. Janus emulsions formed with organic solvents as inner phases. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123947] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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12
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Temperature and composition induced morphology transition of Cerberus emulsion droplets. J Colloid Interface Sci 2019; 554:210-219. [PMID: 31301521 DOI: 10.1016/j.jcis.2019.07.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 07/04/2019] [Accepted: 07/06/2019] [Indexed: 11/23/2022]
Abstract
HYPOTHESIS Various advanced geometries are endowed by the unique structure of "three rooms" of immiscible oils composing the Cerberus droplets. Adjustable interfacial properties and tunable volume ratio in the four-liquid system render it possible to realize the controlled morphology transition by the variation of temperature and emulsion composition. EXPERIMENTS Cerberus emulsions are prepared in batch scale by traditional one-step vortex mixing, employing the oil combinations of methacryloxypropyl dimethyl silicone (DMS)/2-(perfluorooctyl) ethyl methacrylate (PFOEMA)/vegetable oil (VO). Emulsifier of pluoronic F127, a temperature sensitive surfactant is applied. Stereoscopic topological phase diagram as functions of temperature and composition are plotted. Numerical calculations on the droplet morphology including interface curvature, contact angle, and volume fraction of each domain are performed. FINDINGS Four primary regions with specific morphologies, i.e. "VO > DMS < PFOEMA", "VO > DMS > PFOEMA", "VO < DMS > PFOEMA", and finally "VO < DMS < PFOEMA" are obtained. Extended volume ratio range of three lobes, from about 0.03 to 23.3, is achieved and precisely controlled based on the three-phase diagram. What is more, the structural features are found to be thermodynamically determined by the minimization of interfacial energy, though the emulsion is prepared kinetically by vortex mixing. The findings are attractive in the fields of materials synthesis and microreactors.
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Liu SJ, Li JT, Gu F, Wang HJ. Crystallization, vitrification, and gelation of patchy colloidal particles. CHINESE J CHEM PHYS 2019. [DOI: 10.1063/1674-0068/cjcp1810231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Shu-jing Liu
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
- College of Science, Agricultural University of Hebei, Baoding 071001, China
| | - Jiang-tao Li
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Fang Gu
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Hai-jun Wang
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
- Chemical Biology Key Laboratory of Hebei Province, Hebei University, Baoding 071002, China
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14
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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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Ge L, Cheng J, Wei D, Sun Y, Guo R. Anisotropic Particles Templated by Cerberus Emulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:7386-7395. [PMID: 29874466 DOI: 10.1021/acs.langmuir.8b00990] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
A strategy to the batch-scale fabrication of anisotropic particles with diverse morphologies and various chemical compositions is reported by applying the highly structured fluids of Cerberus emulsions as templates. The Cerberus emulsions are produced simply by traditional one-step vortex mixing the surfactant aqueous solution with three immiscible oils which are selectively photocurable or incurable. Anisotropic particles are subsequently fabricated by UV-induced polymerization. The diversity in the morphology of the particles is provided by the various controllable geometries of the Cerberus droplets. Various droplet morphologies of "engulfed-linear", "partial-engulfed-linear", and "linear-singlet" are obtained by employing various oil combinations. Precise control of the volume fraction of each segment within the droplet is realized on the basis of the three-phase diagram of the oils. The wide size range is achieved from hundreds of micrometers continuously down to nanometers, with topology remaining. In addition, for a matrix droplet with a fixed morphology, the multiplicity in the chemical composition and in the geometry of the resultant anisotropic particles is realized by selectively polymerizing one, two, or three of the oil lobes. Morphologies of "crescent moon", "etched-Janus", and "sandwich-Janus" are obtained with homogeneous or multiple distinct chemical compositions. The reported strategy is universal and can be extended to a huge family of polymeric anisotropic particles.
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Affiliation(s)
- Lingling Ge
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou 225009 , China
| | - Jingru Cheng
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou 225009 , China
| | - Duo Wei
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou 225009 , China
- Testing Center , Yangzhou University , Yangzhou 225009 , China
| | - Yue Sun
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou 225009 , China
| | - Rong Guo
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou 225009 , China
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16
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Whitby CP, Bahuon F. Droplet Fusion in Oil-in-Water Pickering Emulsions. Front Chem 2018; 6:213. [PMID: 29946539 PMCID: PMC6005886 DOI: 10.3389/fchem.2018.00213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 05/25/2018] [Indexed: 11/17/2022] Open
Abstract
We have formed compound droplets made of two or more drops of immiscible oils by temporarily destabilizing Pickering oil-in-water emulsions. The emulsions used are synergistically stabilized by mixtures of cationic surfactant and negatively-charged particles. They are highly sensitive to the concentration of surfactant present in the emulsions. We took advantage of transient droplet coalescence events that are triggered by reducing the surfactant concentration to fuse together drops of immiscible oils. This study provides guidelines for designing compound droplets by transient (or limited) coalescence in Pickering emulsions. We show that the possible geometries of particle-stabilized compound drops are determined by the interfacial tensions and relative volumes of the drops fused together. The implications of our results for designing strategies to fabricate multiphase drops are discussed.
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Affiliation(s)
- Catherine P. Whitby
- Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand
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17
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Wei D, Ge L, Lu S, Li J, Guo R. Janus Particles Templated by Janus Emulsions and Application as a Pickering Emulsifier. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5819-5828. [PMID: 28541052 DOI: 10.1021/acs.langmuir.7b00939] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
One-step vibrational mixing has afforded the batch-scale preparation of a Janus emulsion. The fabrication of Janus particles (JPs) templated by Janus emulsions was motivated by the topology and composition of the Janus droplets being highly tunable and controllable. Two immiscible polymerizable monomers were introduced as inner phases of the Janus emulsion. The advanced geometry of the resultant JPs was easily and precisely controlled from "snowman" to "dumbbell" by adjusting the mass ratio of two oils in the initial emulsion. The surface coverage of one lobe to the other was tuned by adjusting the mass ratio of mixed surfactants. Moreover, the size of JPs was able to be extended continuously from hundreds of micrometers to a few hundred nanometers while their morphologies remained within this wide size range. The proposed strategy is a universal technique in the synthesis of a family of composite polymeric JPs with both chemical and shape anisotropy. In addition, the as-generated chemically biphasic JPs were applied as emulsifiers to stabilize Pickering emulsions, and more attractively, emulsion inversion was readily achieved by choosing JPs with different morphologies.
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Affiliation(s)
- Duo Wei
- School of Chemistry and Chemical Engineering and ‡Testing Center, Yangzhou University , Yangzhou 225009, China
| | - Lingling Ge
- School of Chemistry and Chemical Engineering and ‡Testing Center, Yangzhou University , Yangzhou 225009, China
| | - Shuhui Lu
- School of Chemistry and Chemical Engineering and ‡Testing Center, Yangzhou University , Yangzhou 225009, China
| | - Jingjing Li
- School of Chemistry and Chemical Engineering and ‡Testing Center, Yangzhou University , Yangzhou 225009, China
| | - Rong Guo
- School of Chemistry and Chemical Engineering and ‡Testing Center, Yangzhou University , Yangzhou 225009, China
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