Pickering emulsion stabilized with fibrous nanocelluloses: Insight into fiber flexibility-emulsifying capacity relations

Lu, Yu; Li, Jia; Ge, Lingling; Xie, Wenyuan; Wu, Defeng

doi:10.1016/j.carbpol.2020.117483

Cited by 89 publications

(60 citation statements)

References 58 publications

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“…In addition to the gel structure, another important point is that all samples stabilized with CNF presented indistinguishable droplets (points), which can be attributed to the CNFs elongated and exible morphology and their ability to bind or overlap on the water surface of the oil. The larger drops observed for all emulsions result from the three-dimensional network formed, in which the droplets tend to disperse in porous space, and this dispersion caused by the Brownian movement in the aqueous phase approximates the droplets, resulting in the coalescence phenomena (Lu et al 2021).…”

Section: Emulsions' Morphologymentioning

confidence: 99%

“…For emulsions containing CNF (Fig. 2e), there was a signi cant variation between the samples, which can be explained by the gel-like formation, in which the drops are trapped inside the threedimensional structure formed by cellulose nano bers resulting in apparent larger sizes (Lu et al 2019(Lu et al , 2021.…”

Section: Droplets' Sizesmentioning

confidence: 99%

“…According to Li et al, the formation of a gel layer decreases the tendency to coalescence due to steric impairments caused by bers (Li et al 2019b). Lu et al reported that, under appropriate process conditions, brillar nanoparticles' higher concentrations could increase the system's gelling, making it stronger and, consequently, more stable, re ecting in emulsions with long-term stability (Lu et al 2021).…”

Section: Emulsions' Morphologymentioning

confidence: 99%

“…The sedimentation results from the nanoparticles' attraction to each other, which are strong enough to avoid their deposition at the oil/water interface, forming particle clusters later occulated. This behavior is called entropy-driven (Lu et al 2021).…”

Section: Stability Under Storagementioning

confidence: 99%

“…The variation of values between morphologies is associated with the aspect ratio and stabilization methodology, since CNCs stabilize via electrostatic interactions (stabilization associated with nanoparticle and essential oil intrinsic characteristics, such as surface charges and chemical structures), and CNFs form a three-dimensional network that traps the oil droplets inside and avoids their approximation (Lu et al 2021).…”

Section: Stability Under Storagementioning

confidence: 99%

See 4 more Smart Citations

Linalool Essential Oil/Nanocellulose-Based Pickering Emulsions: An In-Depth Investigation of Processing Parameters

Souza¹,

Marciano²,

Ferreira³

et al. 2021

Preprint

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This study aims to prepare nanocellulose-based emulsions using linalool essential oil using different processing parameters and correlating them with emulsions' stability and particle size. The investigated parameters were cellulose morphology (CNC or CNF) and concentration (0.5 or 1 wt%), essential oil concentration (20 or 30% v/v), homogenization speed (10,000 or 12,000 rpm), and time (3 or 7 minutes). The emulsions were tested by droplet size, morphology, and storage stability. The Design of Experiments (DoE) was used to understand each parameter's effects in the emulsions' characteristics and the statistical results. Each nanocellulose morphology presented a type of stabilization in emulsions and different ideal process parameters. CNC-emulsions showed as optimum parameters 30% essential oil and 7 minutes preparation, reflecting the higher necessary energy for the efficient CNCs adsorption in the O/W interface, and the maximum stability was ~ 50% by electrostatic interactions. CNF-emulsions showed optimum parameters 1% CNF and 12,000 rpm homogenization speed, reflecting the necessary parameters to convert the suspensions into gels where the droplets are well-coated by the fibers. This study is a pioneer in an in-depth understanding of the processing parameters' impact on emulsion stability and will be a guideline for future studies with different solid particles and oil phases.

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Section: Emulsions' Morphologymentioning

confidence: 99%

Section: Droplets' Sizesmentioning

confidence: 99%

Section: Emulsions' Morphologymentioning

confidence: 99%

Section: Stability Under Storagementioning

confidence: 99%

Section: Stability Under Storagementioning

confidence: 99%

See 3 more Smart Citations

Linalool Essential Oil/Nanocellulose-Based Pickering Emulsions: An In-Depth Investigation of Processing Parameters

Souza¹,

Marciano²,

Ferreira³

et al. 2021

Preprint

View full text Add to dashboard Cite

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Pickering Emulsions Stabilized by Halloysite Nanotubes: From General Aspects to Technological Applications

Lisuzzo

Cavallaro

Milioto

et al. 2022

Adv Materials Inter

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Besides surfactants, which decrease the interfacial tension between two immiscible liquids, also interfacially active particles can successfully stabilize an emulsion system by attaching at the liquid–liquid interface. The preparation of the resulting Pickering emulsions has been so far investigated starting from the study of the interactions arising between the dispersed droplets and the stabilizers, till the application of these systems in a wide range of different fields. This work is intended to provide an overall overview about the development of Pickering emulsions by considering the most general aspects and scanning the diverse types of solid stabilizers. Among them, Halloysite nanotubes play a major role as naturally derived clay with emulsifying capability owing to their cheap, abundant, green and biocompatible properties. Therefore, the design of Halloysite stabilized Pickering emulsions is the main content of this review, which will survey the role of nanotubes in providing colloidal stability and will comprehensively sum up the use of these particles in technological and industrial purposes: from environmental to catalytic, from health to cultural heritage related applications.

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Pickering emulsion templated strategy in composite aerogels with hierarchical porous structure improves thermal insulation and diphenylamine adsorption

Liu

Hua

et al. 2022

J of Applied Polymer Sci

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A facile Pickering emulsion templated approach is used to achieve nanocelluloses (NCs)/poly(aryl ether ketone) (PAEK) composite aerogels with low density and hierarchical porous structure. In this article, we evaluate the factors including water-oil volume ratio, PAEK loading and NCs species to unravel the impact of fiber morphology on the formation and properties of the Pickering emulsions and aerogels. The results show both cellulose nanofibrils (CNF) and microfibrous cellulose (MFC) display excellent performance in stabilizing Pickering emulsions. Besides, the NCs/PAEK composite aerogels reveal a nanonet constructed porous network with excellent properties of thermal insulation. The lowest thermal conductivity of 17.8 mWÁm À1 ÁK À1 is obtained for the CNF/PAEK composite aerogel. To our knowledge, this is one of the most efficient thermal insulators in the reported NCs-based aerogels. Additionally, the NCs/PAEK composite aerogels demonstrate an efficiency of 98.1% in diphenylamine adsorption of water. These findings reveal a potential application of NCs/PAEK composite aerogels in adsorbent and thermal insulators in chemical industries and the construction sector.

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Pickering emulsion stabilized with fibrous nanocelluloses: Insight into fiber flexibility-emulsifying capacity relations

Cited by 89 publications

References 58 publications

Linalool Essential Oil/Nanocellulose-Based Pickering Emulsions: An In-Depth Investigation of Processing Parameters

Linalool Essential Oil/Nanocellulose-Based Pickering Emulsions: An In-Depth Investigation of Processing Parameters

Pickering Emulsions Stabilized by Halloysite Nanotubes: From General Aspects to Technological Applications

Pickering emulsion templated strategy in composite aerogels with hierarchical porous structure improves thermal insulation and diphenylamine adsorption

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