Fundamental aspects of nanocellulose stabilized Pickering emulsions and foams

Parajuli, Sanjiv; Ureña-Benavides, Esteban E.

doi:10.1016/j.cis.2021.102530

Cited by 43 publications

(23 citation statements)

References 150 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The use of Janus CNM particles offers the possibility of producing Pickering emulsions at commercial scales. Since the early demonstrations in 2011, , CNM-stabilized Pickering emulsions have attracted considerable attention because of their high stability, renewability, and safety. , Nevertheless, the detailed interfacial stabilization and coalescence prevention mechanism for a CNM-stabilized Pickering emulsion is ambiguous . It was reported that amphiphilic Janus CNMs were adsorbed at the interfaces irreversibly as a closely packed monolayer with the hydrophilic plane immersed in the water phase while the hydrophobic (200) plane on the other side interacted with the oil phase, as illustrated in Figure .…”

Section: Janus Cnm Particles and Their Applicationsmentioning

confidence: 99%

“…As the surface charge density of CNM particles decreases, the emulsion volume and stability increase, while droplet sizes decrease. , Thus, different approaches, such as electrolyte addition, pH adjustment, or removal of charge-bearing groups, were adopted to eliminate surface charges and enhance their Janus amphiphilicity . Pickering emulsions with pristine Janus amphiphilic ACC-CNFs exhibited long-term stability in o/w Pickering emulsions, whereas immediate coalescence and phase separation occurred for highly charged TEMPO-CNF (2,2,6,6-tetramethylpiperidine-1-oxyl radical oxidized CNF)-stabilized Pickering emulsions. , Generally, pristine CNMs without a hydrophobic modification can only stabilize oil-in-water (o/w) emulsions, while CNMs after hydrophobic modification can stabilize both o/w and w/o (water-in-oil) types of Pickering emulsions due to the increased hydrophobic to hydrophilic contrast . In contrast to unmodified CNCs, the reducing end hydrophobic modified CNCs with polystyrene (PS) enhanced their amphiphilic character, enabling stable Pickering emulsions with significantly lower surface and interfacial tensions (Figure a) .…”

Section: Janus Cnm Particles and Their Applicationsmentioning

confidence: 99%

“…71,74 Generally, pristine CNMs without a hydrophobic modification can only stabilize oil-in-water (o/w) emulsions, while CNMs after hydrophobic modification can stabilize both o/w and w/o (water-in-oil) types of Pickering emulsions due to the increased hydrophobic to hydrophilic contrast. 140 In contrast to unmodified CNCs, the reducing end hydrophobic modified CNCs with polystyrene (PS) enhanced their amphiphilic character, enabling stable Pickering emulsions with significantly lower surface and interfacial tensions (Figure 5a). 69 Increasing the concentration of these Janus amphiphilic CNMs led to a reduction in droplet size and an increase in surface coverage, thereby efficiently preventing the collision and coalescence of droplets.…”

Section: Janus Cnm Particles and Their Applicationsmentioning

confidence: 99%

See 2 more Smart Citations

Naturally Derived Janus Cellulose Nanomaterials: Anisotropic Cellulose Nanomaterial Building Blocks and Their Assembly into Asymmetric Structures

et al. 2022

View full text Add to dashboard Cite

Naturally derived cellulose nanomaterials (CNMs) with desirable physicochemical properties have drawn tremendous attention for their versatile applications in a broad range of fields. More recently, Janus amphiphilic cellulose nanomaterial particles with asymmetric structures (i.e., reducing and nonreducing ends and crystalline and amorphous domains) have been in the spotlight, offering a rich and sophisticated toolbox for Janus nanomaterials. With careful surface and interfacial engineering, Janus CNM particles have demonstrated great potential as surface modifiers, emulsifiers, stabilizers, compatibilizers, and dispersants in emulsions, nanocomposites, and suspensions. Naturally derived Janus CNM particles offer a fascinating opportunity for scaling up the production of self-standing Janus CNM membranes. Nevertheless, most Janus CNM membranes to date are constructed by asymmetric fabrication or asymmetric modification without considering the Janus traits of CNM particles. More future research should focus on the self-assembly of Janus CNM particles into bulk self-standing Janus CNM membranes to enable more straightforward and sustainable approaches for Janus membranes. This review explores the fabrication, structure–property relationship, and Janus configuration mechanisms of Janus CNM particles and membranes. Janus CNM membranes are highlighted for their versatile applications in liquid, thermal, and light management. This review also highlights the significant advances and future perspectives in the construction and application of sustainable Janus CNM particles and membranes.

show abstract

Section: Janus Cnm Particles and Their Applicationsmentioning

confidence: 99%

Section: Janus Cnm Particles and Their Applicationsmentioning

confidence: 99%

Section: Janus Cnm Particles and Their Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

Naturally Derived Janus Cellulose Nanomaterials: Anisotropic Cellulose Nanomaterial Building Blocks and Their Assembly into Asymmetric Structures

et al. 2022

View full text Add to dashboard Cite

show abstract

“…It can clearly be seen that the phospholipids present in the premix form a particulate residue located where the lamellae of the foam were located. This indicates that solid particles from the premix primarily aggregate at the liquid-air interface, leading to more rigidity and further promoting foam stabilization [32][33][34].…”

Section: Characterization Of Liquid-air Interfacementioning

confidence: 99%

Influence of Oil Polarity and Cosurfactants on the Foamability of Mono- and Diacylphosphatidylcholine Stabilized Emulsions

Bunk

Daniels

2022

Pharmaceutics

View full text Add to dashboard Cite

Foam formulations are safe and effective therapy options for the treatment of chronic skin conditions that require the application of a topical formulation to delicate skin areas, such as scalp psoriasis or seborrheic dermatitis. This study focused on the development of foamable emulsions based on aqueous phospholipid blends. The effects of cosurfactants (nonionic Lauryglucoside (LG); zwitterionic Lauramidopropyl betaine (LAPB)), as well as of oil phases of different polarities, namely paraffin oil (PO), medium-chain triglycerides (MCT) and castor oil (CO), were investigated. The foaming experiments showed that both the type of cosurfactant, as well as the type of oil phase, affects the quality of the resulting foam. Emulsions that were based on a combination of hydrogenated lysophosphatidylcholine (hLPC) and a non-hydrogenated phospholipid, as well as LG as a cosurfactant and MCT as an oil phase, yielded the most satisfactory results. Furthermore, profile analysis tensiometry (PAT), polarization microscopy and laser diffraction analysis were used to characterize the developed formulations. These experiments suggest that the employed phospholipids predominantly stabilize the emulsions, while the cosurfactants are mainly responsible for the formation and stabilization of the foams. However, it appears that both sets of excipients are needed in order to acquire stable emulsions with satisfactory foaming properties.

show abstract

“…In addition, the combination of nanoparticles into the resultant microcapsule shells further improves mechanical strength, solvent resistance, and barrier properties . Thus, Pickering emulsions are more sustainable, biocompatible, and stable than surfactant-stabilized conventional emulsions . Some solid nanoparticles have been applied to prepare oil-in-water Pickering emulsions, such as SiO 2 , graphene oxide, , chitin nanocrystals, and cellulose nanocrystals (CNCs). − …”

Section: Introductionmentioning

confidence: 99%

CuS Nanoparticle-Based Microcapsules for Solar-Induced Phase-Change Energy Storage

Zhang

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Phase-change microcapsules with photothermal conversion capabilities have been the focus of research in the energy storage field. In this study, a route is developed to prepare photothermal conversion and phase-change energy storage microcapsules by copper sulfide-stabilized Pickering emulsion with dodecanol tetradecyl ester as the phase-change material (PCM) and melamine formaldehyde resin (MF) as a shell. Spherical CuS particles with a diameter of approximately 10 nm are first synthesized by a facile hydrothermal reaction. The obtained CuS nanoparticles are used not only as a stabilizer but also as a photothermal conversion material in the preparation of the microcapsules. Then, the PCM microcapsules are prepared by a one-pot interfacial polymerization route and showed a well-defined core–shell structure with an average size of approximately 7 μm. The synthesized microcapsules have a latent heat of up to 180.3 J/g and an encapsulation efficiency of 81.36%. Meanwhile, the thermal conductivity of the microcapsules increased by 115–254% compared to the core material due to the hybrid shell filled with CuS nanoparticles. The photothermal conversion capacity of the synthesized microcapsules is measured and calculated to be up to 85.6%, achieving light-induced phase change and further inducing the passive thermal cycle. This study provides a potential candidate for the application of light-induced energy storage microcapsules in fabric insulation, solar hot water heating systems, and solar thermal power systems.

show abstract

Fundamental aspects of nanocellulose stabilized Pickering emulsions and foams

Cited by 43 publications

References 150 publications

Naturally Derived Janus Cellulose Nanomaterials: Anisotropic Cellulose Nanomaterial Building Blocks and Their Assembly into Asymmetric Structures

Naturally Derived Janus Cellulose Nanomaterials: Anisotropic Cellulose Nanomaterial Building Blocks and Their Assembly into Asymmetric Structures

Influence of Oil Polarity and Cosurfactants on the Foamability of Mono- and Diacylphosphatidylcholine Stabilized Emulsions

CuS Nanoparticle-Based Microcapsules for Solar-Induced Phase-Change Energy Storage

Contact Info

Product

Resources

About