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Kim, D. W.; Kim, H. J.; Kim, M. S.; Choi, Ki‐Young; Kwon, Seol A; Shin, Jae Sup; Kim, J. S.

doi:10.1023/a:1006774122619

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…When oil‐in‐water emulsions are formed with low interfacial tension fluids using colloidal particles called Pickering emulsions, unstable emulsions are formed, leading to phase separation. [ 16–19,21,33,34 ] Indeed, the difference in emulsion stability along with interfacial tension was noticeable in the appearance of oil‐in‐water emulsions using CNFs with different oils (Figure 1b). The lower the interfacial tension at the oil/water interface, the more unstable were the oil‐in‐water emulsions that formed, leading to phase separation; it should be noted that the oil‐in‐water emulsion systems are different with a water‐in‐water emulsion system with extremely low interfacial tension (≈1 µN m −1 ) in that two water‐soluble incompatible polymers can play a role as a depletant to induce attractive depletion interaction.…”

Section: Resultsmentioning

confidence: 99%

“…Our previous work showed that CNFs adsorbed onto methyl methacrylate (MMA) droplets by adding the appropriate oils. [ 33 ] The low interfacial tension (≈10 mN m −1 ) of the MMA–water interface was increased to 25 mN m −1 by 1:1 v/v mixing of MMA oil with chlorobenzene with an interfacial tension of 40 mN m −1 . By adding an appropriate amount of oil, the adsorption of CNFs onto oil can be dramatically improved by controlling the interfacial tension.…”

Section: Resultsmentioning

confidence: 99%

“…[ 30–32 ] An example of difficult adsorption is the low interfacial tension of an oil/water interface. It was consistently found that the lower the interfacial tension at the oil/water interface, the more difficult the adsorption of various particles such as nanocellulose (i.e., cellulose nanocrystal (CNC) [ 16 ] and cellulose nanofibrils (CNFs) [ 18,33,34 ] ), silica, [ 17 ] magnetite, [ 19 ] and graphene oxide. [ 21 ] A typical explanation for the difficult adsorption at low interfacial tension is the relatively low binding energy.…”

Section: Introductionmentioning

confidence: 99%

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Controlled Adsorption of Cellulose Nanofibrils on Fluid–Fluid Interfaces

Kim

Han

You

et al. 2023

Adv Materials Inter

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applications, such as emulsion stabilization, [1] membrane transduction, [2,3] nanocomposites, [4] drug delivery, [5,6] and the fabrication of advanced materials with micro-and nanostructures. [7][8][9][10] In general, adsorption at the interface is explained by the thermodynamic energy difference ΔE ad = − Aγ ow (1 − |cos θ|), where A is the projection area of the particle in contact with the interface, γ ow is the interfacial tension, and θ is the contact angle. Microparticles and sub-micron particles are bound irreversibly at the interface because of the enormous reduction in interfacial energy (typically thousands to millions [10 3 -10 6 ] times the thermal energy). [16][17][18]20,29] Thus, nearly any particle with a proper size and surface properties, unless they are superhydrophilic or superhydrophobic with nanometer size, is readily adsorbed at the interface in an irreversible manner.However, non-adsorbing particles are frequently observed even with a large binding energy, and in this case, external forces such as mechanical, thermal, and chemical actuation are required for successful particle adsorption. [30][31][32] An example of difficult adsorption is the low interfacial tension of an oil/ water interface. It was consistently found that the lower the interfacial tension at the oil/water interface, the more difficult the adsorption of various particles such as nanocellulose (i.e., cellulose nanocrystal (CNC) [16] and cellulose nanofibrils (CNFs) [18,33,34] ), silica, [17] magnetite, [19] and graphene oxide. [21] A typical explanation for the difficult adsorption at low interfacial tension is the relatively low binding energy. [16][17][18][19]21] However, the binding energy is still several thousand times larger than the thermal energy-even at low interfacial tensions (≈5 mN m −1 ) (Figure 1a). Thus, the relationship between difficult adsorption and substantial adsorption energies is contradictory. Accordingly, conventional thermodynamic theories alone cannot clearly explain the difficult adsorption process. It might be more closely related with the "process" of particle adsorption rather than differences in energy "state".Before a particle adsorbs at an interface, a few intermediate steps occur. Initially, particles are transported to a nearby drop by external shear flow, [37] Brownian motion, [38] or external fields, such as gravity [30] and an electric field. [39] As the gap between the solid and drop surfaces becomes narrower, the fluid in the gap is drained out. [30,40] It is well known that drainage dynamics play a major role in the interfacial adsorption of particles as Adsorption of particles at fluid-fluid interfaces is of great scientific and industrial importance, encompassing a variety of applications, from the stabilization of bubbles and emulsions to the fabrication of sophisticated materials with micro-and nanostructures. The enormous adsorption energy of a particle is believed to be the origin of adsorption, but it cannot fully explain many systems that do not adsorb, even with large ads...

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Controlled Adsorption of Cellulose Nanofibrils on Fluid–Fluid Interfaces

Kim

Han

You

et al. 2023

Adv Materials Inter

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A Comprehensive Review of Selected Major Categories of Lithium Isotope Separation Techniques

Murali

Zhang

Free

et al. 2021

Physica Status Solidi (a)

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The ability to generate materials with an enriched isotopic abundance, that is one that differs from natural abundance, is critical in terms of technology. Isotopes are used in a wide range of applications, including radioactive tracers, nondestructive tests, radiotherapy in human medicine, nuclear fuels, and isotope-substituted compounds for chemistry and biology research, as well as environmental geochemical signature tracers. A commonly discussed research topic is the isotopic separation of various elements-uranium, hydrogen, lithium, and iodine, among many others. Among these isotopes, lithium isotopes are especially important in various applications including strategic areas. These isotopes are light and hence their separation techniques are not very obvious. Herein, all the main categories of Li isotope separation are reviewed in depth with a focus on electrochemical technologies for stable lithium isotope separation.

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