Cellulose nanofibrils for one-step stabilization of multiple emulsions (W/O/W) based on soybean oil

Carrillo, Carlos A.; Nypelö, Tiina; Rojas, Orlando J.

doi:10.1016/j.jcis.2014.12.028

Cited by 59 publications

(32 citation statements)

References 42 publications

(63 reference statements)

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“…Bazilevsky et al 35 have shown that electrospinning of an emulsified system leads to fibers with a core-shell structure, with the dispersed droplets in the core and the continuous matrix as the shell. As demonstrated by confocal fluorescence imaging and our previous findings, 28 CNFs in water are the continuous phase in the precursor double emulsions. As such, if one speculates that core-shell geometries are formed then the CNF phase would likely be located in the shell of the fibers.…”

Section: Composite Fibers From Double Emulsion Systemssupporting

confidence: 78%

“…In our previous work we introduced an approach to prepare such emulsions containing natural oil grades emulsified with CNFs and creating gels. 28 Here we present the incorporation of a polymer into the oil phase which facilitated precursor emulsions suitable for further processing into solid materials, for example, in composite fibers and films.…”

Section: Resultsmentioning

confidence: 99%

“…This is an indication that CNFs prevent the rupture of the emulsion, likely by increasing the viscosity of the aqueous phase. 28 A second system, in this case PS-free, was prepared in order to determine if the presence of PS has a similar effect, as that observed for CNFs, on emulsion stability. The total surfactant concentration was, as before, 5 wt% based on the total mass, and the WOR used was the same as the emulsion containing a PS : CNF ratio of 90 : 10.…”

Section: Resultsmentioning

confidence: 99%

“…The emulsions were prepared according to a procedure reported earlier for the development of double emulsions in the presence of cellulose nanofibrils together with an organic phase that included soybean oil, limonene or octane. 28 In the present investigation, the organic phase consisted of polystyrene (PS) (molecular weight of 230 000 g mol À1 , according to the supplier, Sigma Aldrich) dissolved in toluene (Sigma Aldrich). A 1 : 1 : 1 by weight premixed surfactant solution containing polyoxyethylene (20) sorbitan monoester (brand name Span 80) (Sigma-Aldrich), polyethylene glycol tert-octylphenyl ether (Triton X-100, Sigma-Aldrich) and n-pentanol (Acros Organics) was added.…”

Section: Formulation Of the Precursor Emulsionsmentioning

confidence: 99%

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Double emulsions for the compatibilization of hydrophilic nanocellulose with non-polar polymers and validation in the synthesis of composite fibers

2016

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A route for the compatibilization of aqueous dispersions of cellulose nanofibrils (CNFs) with a non-polar polymer matrix is proposed to overcome a major challenge in CNF-based material synthesis. Non-ionic surfactants were used in CNF aqueous dispersions equilibrated with an organic phase (for demonstration, a polystyrene solution, PS, was used). Stable water-in-oil-in-water (W/O/W) double emulsions were produced as a result of the compromise between composition and formulation variables. Most remarkably, the proposed route for CNF integration with hydrophobic polymers removed the need for drying or solvent-exchange of the CNF aqueous dispersion prior to processing. The rheological behavior of the double emulsions showed strong shear thinning behavior and facilitated CNF-PS co-mixing in solid nanofibers upon electrospinning. The morphology and thermal properties of the resultant nanofibers revealed that CNFs were efficiently integrated in the hydrophobic matrix which was consistent with the high interfacial area of the precursor double emulsion. In addition, the morphology and quality of the composite nanofibers can be controlled by the conductivity (ionic strength) of the CNF dispersion. Overall, double emulsion systems are proposed as a novel, efficient and scalable platform for CNF co-processing with non-polar systems and they open up the possibility for the redispersion of CNFs after removal of the organic phase.

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Section: Composite Fibers From Double Emulsion Systemssupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Formulation Of the Precursor Emulsionsmentioning

confidence: 99%

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Double emulsions for the compatibilization of hydrophilic nanocellulose with non-polar polymers and validation in the synthesis of composite fibers

2016

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“…A mass of 7.5 g of the ligninfree (bleached) agave cellulose fibers were dispersed in 500 mL of deionized water, and the suspension was kept under magnetic stirring for 12 h. ereafter, the material was passed several times through the microfluidizer using the 400 and 200 µm chambers arranged in series. Subsequently, the material was passed 6 more times using the 200 and 100 μm chambers, yielding cellulose nanofibrils, according to previous research [22]. e equipment used an intensifying pump that increased the pressure in the chamber, which favoured the interaction between the fibers and the shearing forces and impact against the current of fibrillation [23].…”

Section: Cellulose Nanofibers (Cnfs)mentioning

confidence: 99%

Isolation and Characterization of Nanofibrillar Cellulose from Agave tequilana Weber Bagasse

Hinestroza

Diaz

Alfaro

et al. 2019

Advances in Materials Science and Engineering

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The bagasse of Agave tequilana Weber is one of the most abundant agroindustrial wastes in the state of Jalisco. However, at the present time, there is no technical use for this waste, and its high availability makes it an environmental problem. The objective of this research was to take advantage of this waste and give it an added value to be used in the elaboration of advanced materials. In this sense, the agave bagasse cellulose was obtained using an organosolv method. To obtain the nanofibrils, the cellulose was passed through 6 cycles of a microfluidizer. The material was classified by FTIR, confirming the presence of the functional groups (O-H, C-H, C-C, and C-O-C), characteristics of cellulose, and the elimination of hemicellulose and lignin present in agave bagasse without treatment. The X-ray diffraction technique allowed the determination of the degree of crystallinity of the cellulose nanofibers, which was 68.5%, with a negative zeta potential of −42 mV. The images from the atomic force microscopy helped for the observation of the degree of fibrillation in the cellulose, and with the software ImageJ, the average diameter of the nanofibers was determined to be 75 ± 5 nm with a relatively uniform length of 1.0–1.2 μm. Finally, by means of thermogravimetric analysis, it was found that the obtained cellulose nanofibers (CNFs) supported high temperatures of thermal decomposition, so it was concluded that due to the diameter of the fibrils, the high resistance to pressure, and elasticity, the nanofibrils obtained in this investigation can be used in the elaboration of advanced materials.

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Nanocelluloses at the Oil–Water Interface: Emulsions Toward Function and Material Development

Huan

Ago

Borghei

et al. 2018

Cellulose Science and Technology

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Cellulose nanofibrils for one-step stabilization of multiple emulsions (W/O/W) based on soybean oil

Cited by 59 publications

References 42 publications

Double emulsions for the compatibilization of hydrophilic nanocellulose with non-polar polymers and validation in the synthesis of composite fibers

Double emulsions for the compatibilization of hydrophilic nanocellulose with non-polar polymers and validation in the synthesis of composite fibers

Isolation and Characterization of Nanofibrillar Cellulose from Agave tequilana Weber Bagasse

Nanocelluloses at the Oil–Water Interface: Emulsions Toward Function and Material Development

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