Microemulsion phase formation at oil–cellulose microcrystal suspension interfaces

Kannaiyan, Ranjani; Wang, Jingyi; Gates, Ian D.

doi:10.1007/s10570-018-1679-5

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…Cellulose microspheres can only be obtained by using a low concentration of surfactant at an optimum stirring speed of 1000 rpm as reported by Voon et al [22]. Larger and denser cellulose microspheres are produced due to an increase in the emulsion viscosity of cellulose at higher concentrations which leads to larger microemulsion droplets being ejected through syringes [22,27,28]. Higher cellulose concentration also affects the porosity of the cellulose microspheres as cellulose brils become more compact and thicker which reduces pore size on the surface [24].…”

Section: Effects Of Cellulose Concentrationsmentioning

confidence: 97%

Cellulose Microspheres As Promising Sustainable Controlled Release Carriers for Fertilizers

Balang

Tay

Chin

et al. 2023

Preprint

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Background: Cellulose fibers extracted from printed paper wastes are utilized to synthesize spherical cellulose microspheres via water-in-oil microemulsion and precipitation methods. Span 80 was used as a surfactant and acetic acid as a precipitating agent in the microemulsion and precipitation process to obtain cellulose microspheres. The effects of synthesis conditions such as cellulose concentrations and drying techniques were observed to have profound effects on the surface morphology, particle sizes, and surface area of cellulose microspheres produced. Results: Spherical cellulose microspheres with particle sizes ranging from 5.2 to 9.3 µm were synthesized. Increasing cellulose concentrations led to larger particle sizes. Among various kinds of drying techniques, freeze-drying is the most preferable method for obtaining better yields of cellulose microspheres. The potential applications of the synthesized cellulose microspheres as controlled-release carriers for fertilizer in various soil types were evaluated. The larger particle sizes of cellulose microspheres have a smaller specific surface area, but with higher loading capacities and slower urea release. Conclusions: Our studies showed that the loading capacity and release profiles of urea could be tailored by modulating the mean particle sizes of the cellulose microspheres. Hence, cellulose microspheres demonstrated great potential to be utilized as sustainable controlled-release carriers for fertilizer.

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Section: Effects Of Cellulose Concentrationsmentioning

confidence: 97%

Cellulose Microspheres As Promising Sustainable Controlled Release Carriers for Fertilizers

Balang

Tay

Chin

et al. 2023

Preprint

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“…3 The study of particle jamming and buckling behaviors at the oil/water interface can not only provide fundamental insights into the mechanism of Pickering emulsions but also may lead to the construction of ultrathin film at the interface. 3,4 The adsorption energy of particles at the interface can be several orders of magnitude higher than that of thermal fluctuations. 5 Therefore, the adsorptions of particles at the oil/ water interfaces could be very stable and buckle upon compression of the interfacial area.…”

Section: ■ Introductionmentioning

confidence: 99%

“…When the droplet was deformed, the buckling phenomena can be observed to confirm the formation of a densely packed film at the oil/water interface . The study of particle jamming and buckling behaviors at the oil/water interface can not only provide fundamental insights into the mechanism of Pickering emulsions but also may lead to the construction of ultrathin film at the interface. , …”

Section: Introductionmentioning

confidence: 99%

Buckling Effect of Sole Zeolitic Imidazolate Framework-8 Nanoparticles Adsorbed at the Water/Oil Interface

et al. 2020

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The buckling phenomenon of sole zeolitic imidazolate framework-8 (ZIF-8) particles adsorbed at the water/oil interface was systematically studied. The droplet of ZIF-8 water dispersion was pended in oil for a certain time period and manually extracted to decrease the volume. With the reduction of interfacial area, the ZIF-8 particles were jammed together to form a wrinkling solid film at the water/oil interface, which could withstand the extraction of the droplet and be regenerated. The size and concentration of the particles affected the assembly kinetics. The rapidest assembly was observed for the medium-sized ZIF-8 particles (m-ZIF-8) among the three sizes tested (1.81 μm, 258 nm, and 51 nm). The droplet of 0.91 wt % m-ZIF-8 reached a nearly full surface coverage in 13 min, faster than those with the lower concentration of 0.46 or 0.28 wt %. The pH of the solution, ranging between 6 and 10.7, affected both the assembly kinetics and film stability. Cryo-scanning electron microscopy images of frozen m-ZIF-8-stabilized Picking emulsions showed a monolayer of ZIF-8 wetted by both oil and water phases. The observed buckling effect could be attributed to the stable adsorption of ZIF-8 at the water/oil interface and the interparticle interactions, related to the unique surface chemistry and polyhedral shape of the ZIF-8 crystals. This work provided some understanding on the interfacial property of ZIF-8 and the mechanism of sole ZIF-8-stabilized Pickering emulsions.

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Effect of cellulose nanocrystal nanofluid on displacement of oil in a Hele-Shaw cell

Raza

Gates

2021

Journal of Petroleum Science and Engineering

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Microemulsion phase formation at oil–cellulose microcrystal suspension interfaces

Cited by 4 publications

References 21 publications

Cellulose Microspheres As Promising Sustainable Controlled Release Carriers for Fertilizers

Cellulose Microspheres As Promising Sustainable Controlled Release Carriers for Fertilizers

Buckling Effect of Sole Zeolitic Imidazolate Framework-8 Nanoparticles Adsorbed at the Water/Oil Interface

Effect of cellulose nanocrystal nanofluid on displacement of oil in a Hele-Shaw cell

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