Gas marbles: ultra-long-lasting and ultra-robust bubbles formed by particle stabilization

Xuxin Zhao, Kunling Yang, Zhou Liu, Ho Cheung Shum, Tiantian Kong

Front. Chem. Sci. Eng. ›› 2022, Vol. 16 ›› Issue (11) : 1681-1687.

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Front. Chem. Sci. Eng. ›› 2022, Vol. 16 ›› Issue (11) : 1681-1687. DOI: 10.1007/s11705-022-2180-0
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Gas marbles: ultra-long-lasting and ultra-robust bubbles formed by particle stabilization

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Abstract

Bubbles and foams are ubiquitous in daily life and industrial processes. Studying their dynamic behaviors is of key importance for foam manufacturing processes in food packaging, cosmetics and pharmaceuticals. Bare bubbles are inherently fragile and transient; enhancing their robustness and shelf lives is an ongoing challenge. Their rupture can be attributed to liquid evaporation, thin film drainage and the nuclei of environmental dust. Inspired by particle-stabilized interfaces in Pickering emulsions, armored bubbles and liquid marble, bubbles are protected by an enclosed particle-entrapping liquid thin film, and the resultant soft object is termed gas marble. The gas marble exhibits mechanical strength orders of magnitude higher than that of soap bubbles when subjected to overpressure and underpressure, owing to the compact particle monolayer straddling the surface liquid film. By using a water-absorbent glycerol solution, the resulting gas marble can persist for 465 d in normal atmospheric settings. This particle-stabilizing approach not only has practical implications for foam manufacturing processes but also can inspire the new design and fabrication of functional biomaterials and biomedicines.

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bubble / particles / interfaces / armored bubble / liquid marble / gas marble / Pickering emulsion

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Xuxin Zhao, Kunling Yang, Zhou Liu, Ho Cheung Shum, Tiantian Kong. Gas marbles: ultra-long-lasting and ultra-robust bubbles formed by particle stabilization. Front. Chem. Sci. Eng., 2022, 16(11): 1681‒1687 https://doi.org/10.1007/s11705-022-2180-0

1 Stability of soap bubbles

Soap bubbles are small gas pockets enclosed by liquid films in an air environment. They are commonly seen in children’s play and artistic performances. They are also building blocks that constitute foams, which are ubiquitous in our daily life and industrial processes ranging from foods, cosmetics and medicines to mining. Studying the behaviors of bubbles is crucial for these foam manufacturing industrial processes; their varied behaviors also attract the attention of researchers [1,2]. For instance, bubble films tend to minimize their surface area under given boundary conditions; thus, they are representative experimental models of minimal surfaces for verifying complex mathematical problems involving minimal optimization [3,4].
Soap bubbles are thought to be fragile and transient, and their rupture is related to viscous surface tension as well as Marangoni and nuclei effects depending on the composition of the bubble shell and the surrounding environment [1,3]. Without any stabilizers, the bursting of bare bubbles is primarily caused by the gravity-induced drainage of the liquid film, the thickness h of which follows the dynamics [5] h=h0exp(t/τ), where τ is the characteristic time of drainage scaling as η/ρgR, h0 denotes the initial film thickness, η is the liquid viscosity, ρ is the liquid density, and R is the bubble radius, respectively. When the bubble surface is thinned to a critical value, normally on the order of tens of nanometers, long-range van der Waals interactions accelerate the thinning process, and the bursting of bubbles consequently occurs [5]. Increasing the liquid viscosity of the liquid film can prevent film drainage and prolong the lifetime of bubbles [6]. However, bare viscous bubbles are still transient and can only last seconds. By adding surfactants to the bubble shell, surfactant molecules can induce the Marangoni effect on the surface or even immobilize surface boundaries [7], which significantly prevents film drainage and can promote bubble life to minutes. Even so, surfactant-stabilized bubbles eventually rupture due to liquid evaporation and/or the nucleation of holes caused by dust in the surrounding environment. In a dustless, vibration-free environment with saturated vapor atmospheres to suppress the nuclei and to prevent the evaporation of liquid, a bare viscous bubble can reach a lifetime as long as 2 years [5]. However, in a normal environment, overcoming film drainage, evaporation, and nuclei effects and achieving a long bubble lifetime are challenging tasks [8].

2 Particulate interfaces: particle-covered droplets in liquid, particle-covered bubbles in liquid and particle-covered droplets in air

Since Ramsden [9] and Pickering [10] found a century ago that particles are surface reactive and can therefore adsorb onto interfaces, particles have been intensively used as particulate agents to stabilize multiphase interfaces similar to surfactant molecules (Fig.1). For instance, particles can occupy the interface of immiscible liquids, stabilizing either water-in-oil or oil-in-water emulsions [1115], as shown in Fig.1(a)–(c). These particle-stabilized emulsions are called Pickering emulsions [16], named after S.U. Pickering, who discovered them in 1907 [10]. In addition, particles can absorb on the liquid−air interface and thus serve as stabilizers for air bubbles in liquid, forming particle-covered bubbles in a liquid environment, which are also known as “armored bubbles” [1723] (Fig.1(d–g)). This can also coat liquid droplets in air, forming particle-covered droplets termed “liquid marbles” [2430]. Particles can even hang onto interfaces with ultralow interfacial tensions, such as in the interface of aqueous two-phase systems. The two immiscible aqueous phases are formed by phase separation in an aqueous solution dissolved with polymers, biomolecules and salts [3133]. Recent works have revealed that protein particles [34] and fibrils [35,36] can effectively stabilize aqueous-in-aqueous emulsions.
Fig.1 (a) Schematics of a Pickering emulsion. (b) Asymmetric Janus Pickering emulsions through particle jamming of coalesced emulsions. The scale bar is 500 μm. Reproduced with permission from Ref. [15], copyright 2014, Springer Nature. (c) The deformation and stability of Pickering emulsions in an electric field. The scale bar is 300 μm. Reproduced with permission from Ref. [11], copyright 2013, The American Association for the Advancement of Science. (d) Schematics of an armored bubble. (e) Optic images of a spherical armored bubble. The scale bar is 400 μm. Reproduced with permission from Ref. [18], copyright 2006, American Chemical Society. (f) Two floating armored bubbles do not coalesce due to particle stabilization. The scale bar is 200 μm. Reproduced with permission from Ref. [37], copyright 2020 Elsevier. (g) Nonspherical armored bubbles with various shapes [18]. The scale bar is 200 μm. (h) Schematics of a liquid marble. (i) Photographs of liquid marbles encapsulating various chemical solutions. The scale bar is 2 mm. Reproduced with permission from Ref. [38], copyright 2019, Wiley-VCH. (j) SEM image of a dried polyhedral liquid marble stabilized by hexagonal fluorinated PET plates. The scale bar is 200 μm. Reproduced with permission from Ref. [39], copyright 2019, Wiley-VCH. (k) Complex particle-stabilized liquid/air surfaces forming a complex structure representing a Chinese dragon symbol. The scale bar is 10 cm. Reproduced with permission from Ref. [40], copyright 2018, Wiley-VCH.

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The accumulation of particles on the interface is driven by the minimization of the total surface energy of the system [13,41,42]. For instance, the spherical particle straddled at the immiscible interface has an adsorption energy of ΔG=πa2γ(1|cosθ|)2, where a denotes the radius of the colloidal particle, γ indicates the interfacial tension, and θ is the contact angle at the interface [41]. For particles with nonspherical shapes, such as rod-like particles and disk-like particles, the adsorption energies at the fluid surface are even larger than those with spherical particles of the same volume, thereby strengthening their attachment to fluid interfaces [39,41,43]. For most particle-laden interfaces, the adsorption energy of particles is several orders higher than the thermal energy kT, with k and T being the Boltzmann constant and the temperature, respectively. As a result, the adsorption of particles at interfaces is irreversible, which differs from surfactant molecules that constantly adsorb and desorb. More interestingly, Janus particles that have two distinct surface regions with opposite chemical compositions and wetting properties are considerably more effective than homogeneous particles in stabilizing multiphase interfaces [4447].

3 Gas marbles: a recently discovered particle-covered bubble in air

Particulate materials, such as fat globules and protein aggregates, have been applied extensively for stabilizing foams in the food industry [2,41]. Most studies have focused on the collective behaviors of foams against coalescence and flocculation, which are crucial for the quality and shelf life of foam-based food products. In comparison, research on the individual behavior of particle-stabilized bubbles has been inadequate. Recently, a compact monolayer of microparticles has been demonstrated to straddle on air/liquid/air interfaces and stabilize a single bubble, forming a new soft object called a “gas marble” [8,48,49], as shown in Fig.2. A gas marble consists of gas coated by a layer of particles that entrap a liquid thin film exposed to the atmosphere, as shown in Fig.2(a,b). Although the states of their constituent phases are different, the appearance of a gas marble is similar to that of a liquid marble. Importantly, the delimiting particle armor in liquid marble straddles at the single-layer liquid−gas interface, while that in gas marble straddles at the bilayer liquid−gas interfaces, as shown inFig.2(a).
Fig.2 (a) Schematic of a gas marble. Insert illustrating the cross-section of the gas marble shell and the layout of particles on the marble surface. (b) Optical image of a gas marble. The fluorescent picture demonstrates the enlargement of the particle layout. (c) Comparison of mechanical stability among gas marbles, liquid marbles and armored marbles at different sizes of bubbles and drops (Db). Both the critical overpressures (ΔP+) and underpressures (ΔP+) are normalized by capillary pressure (ΔPcap) to make a fair comparison. Reproduced with permission from Ref. [45], copyright 2017, American Physicsal Society.

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Compared to soap bubbles, a gas marble with particle-entrapping liquid film has significantly higher robustness [48]. The mechanical stability of a gas marble can be characterized by measuring the pressure difference ΔP = PbPatm that causes bursting, where Pb and Patm denote the inner pressure of the gas marble and the atmospheric pressure, respectively. There are two scenarios in which a gas marble can rupture: overpressure ΔP+ > 0 when the gas marble undergoes an inflation test, and underpressure Δ P < 0 while a gas marble is in the deflation process. It has been found that particulate bubbles can sustain both overpressures and underpressures with amplitudes ~10 times greater than the Laplace pressure, Δ Pcap = 4γ/Rb (a gas marble has two liquid/air interfaces), which suggests that the particle monolayer at the thin liquid film dramatically improves the stability of bubbles [48]. The outstanding mechanical strength is attributed to the strong cohesive nature of the particle-assembled shell on the bubble surface. More interestingly, the normalized pressures ΔP+Pcap and ΔPPcap of a gas marble are much larger than those of liquid marbles and armored bubbles [23,50], as shown in Fig.2(c). The significant differences in underpressures between gas marbles and liquid marbles come from the capacity of gas marbles to resist fluid loading up to 10 times the Laplace pressure of corresponding bare bubbles, whereas liquid marbles do not possess any strength for such a solicitation mode [48].

4 Gas marbles represent ultra-long-lasting bubbles in the atmospheric environment

Gas marbles are more robust than bubbles, liquid marbles and armored bubbles underwater [48]. Do they have a longer life than bubbles with no particles? A recent work demonstrated that particle-stabilized bubbles can maintain their integrity for more than 1 year in a standard atmosphere [8]. The ultra-long-lasting bubble is a gas marble featuring a particle-entrapping thin film of glycol aqueous solution. Its long life is attributed to the conduction of film drainage, liquid evaporation and gas diffusion, which accounts for the otherwise transient and fragile nature of bare bubbles. First, the particle shell can slow the drainage of the film through wetting forces. These partial-wetting particles adsorb on the two liquid interfaces, forming a monolayer through cohesive attractions. This monolayer traps the liquid by capillarity, makes the liquid passages constricted and tortuous, and thus significantly hinders the overall drainage within the thin film [41]. Second, the particles on the film can reduce the area of the surface across which gas diffuses, thus making the particulate film less permeable to gas than their pure liquid counterparts. The low gas permeability of the film slows the aging of gas marbles since evaporation is inhibited [49]. For instance, a normal water soap bubble (Rb = 3.7 mm) could burst within 1 min because of evaporation. When coated with the particles, the lifetime of a water bubble with an identical radius can be prolonged to 9 min, as shown in Fig.3(a). The phenomenon wherein particulate film reduces evaporation also exists in liquid marbles. It has also been suggested that the higher the surface coverage is, the lower the evaporation rate [51]. Last but not least, to further slow the evaporation and make the bubble longer lasting, a mixture of water and glycerol can be formulated to generate a gas marble (Fig.3). Glycerol has a strong affinity for water molecules due to its rich hydroxyl groups. Thus, the glycerol within the particulate film of bubble can absorb water molecules contained in air, which compensates for water evaporation and enhances bubble stability (Fig.3(a)). In a gas marble, adsorption and evaporation of water can be balanced, and the resultant marble can be further stabilized by optimizing the glycerol mass ratio and relative humidity, as summarized in the phase diagram shown in Fig.3(b) [8].
Fig.3 (a) Morphology and lifetimes of different marbles: soap water bubble, water gas marble and water/glycerol gas marble. The water/glycerol gas marble has the longest lifetime, which maintains its morphology after 9 months. (b) Phase diagram of different regimes of gas marble depending on the initial glycerol mass ratio and the relative humidity. Reproduced with permission from Ref. [8], copyright 2022, American Physical Society.

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5 Perspectives of gas marbles

Recent progress in particle-stabilized bubble with ultra-robustness and ultra-long-lasting life not only extends our understanding of particulate-stabilized interfaces but could also have important implications for applications. Gas marbles can inspire the design and fabrication of novel materials. For instance, highly robust bubbles could inspire new strategies for foam stabilization, which is crucial for developing foam-based materials or products [1,2,23]. By inhibiting the coalescence of foams on the level of a single bubble, well-controlled aerated materials can also be designed. Additionally, particulate-stabilized bubbles with high mechanical strength and long life can be exploited as gas storage materials. By designing the film composition and inhibiting the gas permittivity, valuable or polluted gases can be encapsulated inside the bubbles with insignificant gas diffusion/exchange with the environment.
Gas marbles can also be utilized as a new type of confined microreactor. For instance, we can use gas marbles for miniaturized reactions between interior and exterior gases. By tuning the film composition, we can control the permittivity of gas marbles and explore the reaction dynamics of the two gases. In addition, the thin film of gas marbles can be the confinement where miniaturized liquid/gas reactions with high efficiency take place. The thin film of gas marbles possesses an ultrahigh surface-to-volume ratio: S/V ~1/h, where h is the thickness of the film. With its unique properties, this new soft object, the gas marble, could open new possibilities both for a fundamental understanding of particle-laden interfaces as well as for the development of novel bubble-based materials and novel microreactors.

References

[1]
Wang J, Nguyen A V, Farrokhpay S. A critical review of the growth, drainage and collapse of foams. Advances in Colloid and Interface Science, 2016, 228 : 55– 70
CrossRef Google scholar
[2]
Hill C, Eastoe J. Foams: from nature to industry. Advances in Colloid and Interface Science, 2017, 247 : 496– 513
CrossRef Google scholar
[3]
Lubetkin S D. The fundamentals of bubble evolution. Chemical Society Reviews, 1995, 24( 4): 243– 250
CrossRef Google scholar
[4]
Dollet B, Marmottant P, Garbin V. Bubble dynamics in soft and biological matter. Annual Review of Fluid Mechanics, 2019, 51( 1): 331– 355
CrossRef Google scholar
[5]
Debrégeas G, de Gennes P G, Brochard-Wyart F. The life and death of “bare” viscous bubbles. Science, 1998, 279( 5357): 1704– 1707
CrossRef Google scholar
[6]
Frazier S, Jiang X, Burton J C. How to make a giant bubble. Physical Review Fluids, 2020, 5( 1): 013304
CrossRef Google scholar
[7]
Schwartz L W, Roy R V. Modeling draining flow in mobile and immobile soap films. Journal of Colloid and Interface Science, 1999, 218( 1): 309– 323
CrossRef Google scholar
[8]
Roux A, Duchesne A, Baudoin M. Everlasting bubbles and liquid films resisting drainage, evaporation, and nuclei-induced bursting. Physical Review Fluids, 2022, 7( 1): L011601
CrossRef Google scholar
[9]
Ramsden W, Gotch F. Separation of solids in the surface-layers of solutions and ‘suspensions’; (observations on surface-membranes, bubbles, emulsions, and mechanical coagulation); preliminary account. Proceedings of the Royal Society of London, 1904, 72( 477−486): 156– 164
[10]
Pickering S U. CXCVI—emulsions. Journal of the Chemical Society, Transactions, 1907, 91 : 2001– 2021
CrossRef Google scholar
[11]
Cui M, Emrick T, Russell T P. Stabilizing liquid drops in nonequilibrium shapes by the interfacial jamming of nanoparticles. Science, 2013, 342( 6157): 460– 463
CrossRef Google scholar
[12]
Dinsmore A D, Hsu M F, Nikolaides M G, Marquez M, Bausch A R, Weitz D A. Colloidosomes: selectively permeable capsules composed of colloidal particles. Science, 2002, 298( 5595): 1006– 1009
CrossRef Google scholar
[13]
Kaz D M, McGorty R, Mani M, Brenner M P, Manoharan V N. Physical ageing of the contact line on colloidal particles at liquid interfaces. Nature Materials, 2012, 11( 2): 138– 142
CrossRef Google scholar
[14]
Li M, Harbron R L, Weaver J V M, Binks B P, Mann S. Electrostatically gated membrane permeability in inorganic protocells. Nature Chemistry, 2013, 5( 6): 529– 536
CrossRef Google scholar
[15]
Rozynek Z, Mikkelsen A, Dommersnes P, Fossum J O. Electroformation of Janus and patchy capsules. Nature Communications, 2014, 5( 1): 3945
CrossRef Google scholar
[16]
Wu J, Ma G H. Recent studies of pickering emulsions: particles make the difference. Small, 2016, 12( 34): 4633– 4648
CrossRef Google scholar
[17]
Bala Subramaniam A, Abkarian M, Mahadevan L, Stone H A. Non-spherical bubbles. Nature, 2005, 438( 7070): 930
CrossRef Google scholar
[18]
Bala Subramaniam A, Abkarian M, Mahadevan L, Stone H A. Mechanics of interfacial composite materials. Langmuir, 2006, 22( 24): 10204– 10208
CrossRef Google scholar
[19]
Bala Subramaniam A, Abkarian M, Stone H A. Controlled assembly of jammed colloidal shells on fluid droplets. Nature Materials, 2005, 4( 7): 553– 556
CrossRef Google scholar
[20]
Huerre A, De Corato M, Garbin V. Dynamic capillary assembly of colloids at interfaces with 10000 g accelerations. Nature Communications, 2018, 9( 1): 3620
CrossRef Google scholar
[21]
Abkarian M, Bala Subramaniam A, Kim S H, Larsen R J, Yang S M, Stone H A. Dissolution arrest and stability of particle-covered bubbles. Physical Review Letters, 2007, 99( 18): 188301
CrossRef Google scholar
[22]
Pierre J, Dollet B, Leroy V. Resonant acoustic propagation and negative density in liquid foams. Physical Review Letters, 2014, 112( 14): 148307
CrossRef Google scholar
[23]
Taccoen N, Lequeux F, Gunes D Z, Baroud C N. Probing the mechanical strength of an armored bubble and its implication to particle-stabilized foams. Physical Review X, 2016, 6( 1): 011010
CrossRef Google scholar
[24]
Aussillous P, Quéré D. Liquid marbles. Nature, 2001, 411( 6840): 924– 927
CrossRef Google scholar
[25]
Mahadevan L. Non-stick water. Nature, 2001, 411( 6840): 895– 896
CrossRef Google scholar
[26]
Rong X, Ettelaie R, Lishchuk S V, Cheng H, Zhao N, Xiao F, Cheng F, Yang H. Liquid marble-derived solid−liquid hybrid superparticles for CO2 capture. Nature Communications, 2019, 10( 1): 1854
CrossRef Google scholar
[27]
Xin Z, Skrydstrup T. Liquid marbles: a promising and versatile platform for miniaturized chemical reactions. Angewandte Chemie International Edition, 2019, 58( 35): 11952– 11954
CrossRef Google scholar
[28]
Anyfantakis M, Jampani V S R, Kizhakidathazhath R, Binks B P, Lagerwall J P F. Responsive photonic liquid marbles. Angewandte Chemie International Edition, 2020, 59( 43): 19260– 19267
CrossRef Google scholar
[29]
Vialetto J, Hayakawa M, Kavokine N, Takinoue M, Varanakkottu S N, Rudiuk S, Anyfantakis M, Morel M, Baigl D. Magnetic actuation of drops and liquid marbles using a deformable paramagnetic liquid substrate. Angewandte Chemie International Edition, 2017, 56( 52): 16565– 16570
CrossRef Google scholar
[30]
Sheng L, Zhang J, Liu J. Diverse transformations of liquid metals between different morphologies. Advanced Materials, 2014, 26( 34): 6036– 6042
CrossRef Google scholar
[31]
Hatti-Kaul R. Aqueous two-phase systems. Molecular Biotechnology, 2001, 19( 3): 269– 277
CrossRef Google scholar
[32]
Albertsson P E R Å. Partition of proteins in liquid polymer-polymer two-phase systems. Nature, 1958, 182( 4637): 709– 711
CrossRef Google scholar
[33]
Chao Y, Shum H C. Emerging aqueous two-phase systems: from fundamentals of interfaces to biomedical applications. Chemical Society Reviews, 2020, 49( 1): 114– 142
CrossRef Google scholar
[34]
Balakrishnan G, Nicolai T, Benyahia L, Durand D. Particles trapped at the droplet interface in water-in-water emulsions. Langmuir, 2012, 28( 14): 5921– 5926
CrossRef Google scholar
[35]
Song Y, Shimanovich U, Michaels T C T, Ma Q, Li J, Knowles T P J, Shum H C. Fabrication of fibrillosomes from droplets stabilized by protein nanofibrils at all-aqueous interfaces. Nature Communications, 2016, 7( 1): 12934
CrossRef Google scholar
[36]
Song Y, Michaels T C T, Ma Q, Liu Z, Yuan H, Takayama S, Knowles T P J, Shum H C. Budding-like division of all-aqueous emulsion droplets modulated by networks of protein nanofibrils. Nature Communications, 2018, 9( 1): 2110
CrossRef Google scholar
[37]
Cervantes-Álvarez A M, Escobar-Ortega Y Y, Sauret A, Pacheco-Vázquez F. Air entrainment and granular bubbles generated by a jet of grains entering water. Journal of Colloid and Interface Science, 2020, 574 : 285– 292
CrossRef Google scholar
[38]
Liu Z, Yang T, Huang Y, Liu Y, Chen L, Deng L, Shum H C, Kong T. Electrocontrolled liquid marbles for rapid miniaturized organic reactions. Advanced Functional Materials, 2019, 29( 19): 1901101
CrossRef Google scholar
[39]
Geyer F, Asaumi Y, Vollmer D, Butt H J, Nakamura Y, Fujii S. Polyhedral liquid marbles. Advanced Functional Materials, 2019, 29( 25): 1808826
CrossRef Google scholar
[40]
Li X, Shi H, Wang Y, Wang R, Huang S, Huang J, Geng X, Zang D. Liquid shaping based on liquid pancakes. Advanced Materials Interfaces, 2018, 5( 2): 1701139
CrossRef Google scholar
[41]
Binks B P Horozov T S. Colloidal Particles at Liquid Interfaces. Cambridge: Cambridge University Press, 2006
[42]
Sun Z, Wu B, Ren Y, Wang Z, Zhao C X, Hai M, Weitz D A, Chen D. Diverse particle carriers prepared by co-precipitation and phase separation: formation and applications. ChemPlusChem, 2021, 86( 1): 49– 58
CrossRef Google scholar
[43]
Fujiwara J, Geyer F, Butt H J, Hirai T, Nakamura Y, Fujii S. Liquid marbles: shape-designable polyhedral liquid marbles/plasticines stabilized with polymer plates. Advanced Materials Interfaces, 2020, 7( 24): 2070133
CrossRef Google scholar
[44]
Sun Z, Yan X, Xiao Y, Hu L, Eggersdorfer M, Chen D, Yang Z, Weitz D A. Pickering emulsions stabilized by colloidal surfactants: role of solid particles. Particuology, 2022, 64 : 153– 163
CrossRef Google scholar
[45]
Binks B P, Fletcher P D I. Particles adsorbed at the oil-water interface: a theoretical comparison between spheres of uniform wettability and “Janus” particles. Langmuir, 2001, 17( 16): 4708– 4710
CrossRef Google scholar
[46]
Chen D, Amstad E, Zhao C X, Cai L, Fan J, Chen Q, Hai M, Koehler S, Zhang H, Liang F, Yang Z, Weitz D A. Biocompatible amphiphilic hydrogel-solid dimer particles as colloidal surfactants. ACS Nano, 2017, 11( 12): 11978– 11985
CrossRef Google scholar
[47]
Sun Z, Yang C, Wang F, Wu B, Shao B, Li Z, Chen D, Yang Z, Liu K. Biocompatible and pH-responsive colloidal surfactants with tunable shape for controlled interfacial curvature. Angewandte Chemie International Edition, 2020, 59( 24): 9365– 9369
CrossRef Google scholar
[48]
Timounay Y, Pitois O, Rouyer F. Gas marbles: much stronger than liquid marbles. Physical Review Letters, 2017, 118( 22): 228001
CrossRef Google scholar
[49]
Timounay Y, Ou E, Lorenceau E, Rouyer F. Low gas permeability of particulate films slows down the aging of gas marbles. Soft Matter, 2017, 13( 42): 7717– 7720
CrossRef Google scholar
[50]
Liu Z, Zhang Y, Chen C, Yang T, Wang J, Guo L, Liu P, Kong T. Larger stabilizing particles make stronger liquid marble. Small, 2019, 15( 3): 1804549
[51]
Saczek J, Yao X, Zivkovic V, Mamlouk M, Wang D, Pramana S S, Wang S. Long-lived liquid marbles for green applications. Advanced Functional Materials, 2021, 31( 35): 2011198
CrossRef Google scholar

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 22078197 and 52172283) and the Natural Science Foundation of Guangdong Province (Grant No. 2021A1515012506). Zhou Liu and Tiantian Kong are also thankful for the support of Shenzhen Overseas High-level Talents Key Foundation for Innovation and Entrepreneurship. Ho Cheung Shum is supported in part by the Croucher Foundation through the Croucher Senior Research Fellowship.

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