An Oligoimide Particle as a Pickering Emulsion Stabilizer

A pyromellitic dianhydride (PMDA) and 4,4′-oxydianiline (ODA)-based oligoimide (PMDA-ODA) was synthesized by a one-step procedure using water as a solvent. The PMDA-ODA particles showed excellent partial wetting properties and were stably dispersed in both water and oil phases. A stable dispersion was not obtained with comparison PMDA-ODA particles that were synthesized by a conventional two-step method using an organic solvent. Both oil-in-water and water-in-oil Pickering emulsions were prepared using the oligoimide particles synthesized in water, and the size of the emulsion droplet was controlled based on the oligoimide particle concentration. The oligoimide particles were tested to prepare Pickering emulsions using various kinds of oils. The oil-in-water Pickering emulsions were successfully applied to prepare microcapsules of the emulsion droplets. Our new Pickering emulsion stabilizer has the advantages of easy synthesis, no need for surface modification, and the capability of stabilizing both oil-in-water and water-in-oil emulsions.

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Preparation of a synergistically stabilized oil-in-water paraffin Pickering emulsion for potential application in wood treatment

Holzforschung ◽

10.1515/hf-2017-0154 ◽

2018 ◽

Vol 72 (6) ◽

pp. 489-497 ◽

Cited By ~ 5

Author(s):

Jun Jiang ◽

Jinzhen Cao ◽

Wang Wang ◽

Haiying Shen

Keyword(s):

Mechanical Properties ◽

Cell Wall ◽

Size Distribution ◽

Droplet Size ◽

Surface Hardness ◽

Pickering Emulsion ◽

Silica Particles ◽

Morphological Properties ◽

Pickering Emulsions ◽

Oil In Water

AbstractPickering emulsions (emulsions stabilized by solid-state additives) are attractive as they have strong similarities with traditional surfactant-based emulsions. In this study, an oil-in-water (O/W) paraffin Pickering emulsion system with satisfying stability and small droplet size distribution was developed by hydrophilic silica particles and traditional surfactants as mixed emulsifiers. The droplet morphology and size distribution were observed by optical microscopy and a laser particle analyzer. The emulsion stability was improved and the droplet size was reduced after addition of a suitable amount of silica particles. The silica concentration of 1% showed the optimal effect among all the levels observed (0.1, 0.5, 1 and 2%). Wood was impregnated with the prepared emulsion, and the chemical and morphological properties of the product were investigated by Fourier-transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) combined with energy-dispersed X-ray analysis (SEM-EDXA). Moreover, the hydrophobicity, thermal properties, surface hardness, axial compression strength (CS) and dynamic mechanical properties were tested. The silica was evenly distributed in the wood cell wall and thus there was a synergistic positive effect from the paraffin and silica in the cell wall leading to better hydrophobicity, improved surface hardness and mechanical properties including the thermal stability.

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General destabilization mechanism of pH-responsive Pickering emulsions

Physical Chemistry Chemical Physics ◽

10.1039/c7cp04665k ◽

2017 ◽

Vol 19 (45) ◽

pp. 30790-30797 ◽

Cited By ~ 7

Author(s):

Thriveni G. Anjali ◽

Madivala G. Basavaraj

Keyword(s):

Pickering Emulsion ◽

Pickering Emulsions ◽

Ph Responsive ◽

Emulsion Droplets

pH driven detachment of particles from Pickering emulsion droplets.

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Pickering-Type Emulsions of ODSA Sizing Agent Stabilized by Nano-Montmorillonite and N-Dodecane

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.319.233 ◽

2013 ◽

Vol 319 ◽

pp. 233-238 ◽

Cited By ~ 1

Author(s):

De Hai Yu ◽

Zhao Yun Lin ◽

You Ming Li

Keyword(s):

Particle Concentration ◽

Ph Value ◽

Water Interface ◽

Pickering Emulsions ◽

Paper Sizing ◽

Oil In Water ◽

Effects Of Ph ◽

Oil Water ◽

The Stability ◽

Hydrolysis Resistance

Octadecenylsuccinic anhydride (ODSA) is an internal sizing agent used to hydrophobize paper and paper board in the process of papermaking. Nano-montmorillonite (MMT) particles and n-dodecane were used as the stabilizer to prepare stable ODSA Pickering emulsions. The effects of pH value, particle concentration, hydrolysis resistance and paper sizing performance of the ODSA Pickering emulsions were investigated. It was found that the stability of ODSA emulsions first increased and then decreased as the pH value decreased. More stable oil-in-water (o/w) emulsion can be made using 10 vol.% n-dodecane. Particle concentration was linked to the formation of particle films at oil–water interface, with a required minimum particle concentration of 1.5 wt.%. Paper sizing degree analysis indicated that the ODSA Pickering emulsions show increased hydrolysis resistance and good sizing performance.

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Superwettable porous spheres prepared by recyclable Pickering emulsion polymerization for multifarious oil/water separations

Green Chemistry ◽

10.1039/d0gc04147e ◽

2021 ◽

Author(s):

Chao Wang ◽

Hui Chi ◽

Fan Zhang ◽

Xinyue Wang ◽

Yinchuan Wang ◽

...

Keyword(s):

Low Cost ◽

Pickering Emulsion ◽

Porous Polymer ◽

Environment Friendly ◽

Pickering Emulsion Polymerization ◽

Oil In Water ◽

Polymer Sphere ◽

Oil Water ◽

Oil Emulsions ◽

Porous Spheres

A low-cost, environment-friendly, and sustainable strategy for fabricating a superwettable porous polymer sphere is reported for the treatment of various kinds of oil-in-water and water-in-oil emulsions.

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Compressible colloidal clusters from Pickering emulsions and their DNA functionalization

Chemical Communications ◽

10.1039/c8cc03637c ◽

2018 ◽

Vol 54 (60) ◽

pp. 8328-8331 ◽

Cited By ~ 6

Author(s):

In-Seong Jo ◽

Joon Suk Oh ◽

Shin-Hyun Kim ◽

David J. Pine ◽

Gi-Ra Yi

Keyword(s):

Pickering Emulsions ◽

Polymer Particles ◽

Water Emulsion ◽

Crosslinked Polymer ◽

Emulsion Droplets ◽

Colloidal Clusters ◽

Oil In Water ◽

Oil In Water Emulsion ◽

Dna Functionalization

Colloidal clusters were prepared by assembling azide-functionalized non-crosslinked polymer particles using fluorinated oil-in-water emulsion droplets.

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Structural stability of liposome-stabilized oil-in-water pickering emulsions and their fate during in vitro digestion

Food & Function ◽

10.1039/c9fo00967a ◽

2019 ◽

Vol 10 (11) ◽

pp. 7262-7274 ◽

Cited By ~ 7

Author(s):

Weilin Liu ◽

Jianhua Liu ◽

Louise J. Salt ◽

Mike J. Ridout ◽

Jianzhong Han ◽

...

Keyword(s):

Structural Stability ◽

External Environment ◽

In Vitro Digestion ◽

Pickering Emulsion ◽

Pickering Emulsions ◽

Gastrointestinal Conditions ◽

Oil In Water ◽

Delivery Routes

An interesting liposome-stabilized oil-in-water Pickering emulsion shows pH-controllable and surfactant-dependent deformability whilst displaying dual delivery routes under external environment and oral-gastrointestinal conditions.

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Facile immobilization of lipase based on Pickering emulsion via a synergistic stabilization by palygorskite–enzyme

Clay Minerals ◽

10.1180/clm.2019.40 ◽

2019 ◽

Vol 54 (3) ◽

pp. 293-298

Author(s):

Dong Li ◽

Min Shen ◽

Guofan Sun ◽

Huiran Jin ◽

Peng Cai ◽

...

Keyword(s):

Optical Microscopy ◽

Immobilized Lipase ◽

Aqueous Dispersion ◽

Pickering Emulsion ◽

Catalytic Performance ◽

Pickering Emulsions ◽

Emulsion Droplets ◽

Level Of Activity ◽

High Level

AbstractA Pickering emulsion was prepared via synergistic stabilization of a lipase and palygorskite particles. The optimum conditions for the stabilization of the Pickering emulsion, such as the concentrations of the palygorskite particles and lipase, were explored. The morphology of emulsion droplets was examined using digital optical microscopy and polarizing optical microscopy. The palygorskite–lipase co-stabilized Pickering emulsions were investigated by determination of the adsorption rate, pH and zeta potential of the aqueous dispersion, as well as by determining the contact angle values of the lipase solution on a palygorskite disc that was immersed in toluene. The catalytic performance of the immobilized lipase in the Pickering emulsion was studied via the investigation of its thermal stability, storage stability and reusability. The immobilized lipase showed greater stability than the free lipase. The lipase immobilized by Pickering emulsion retained a high level of activity even after seven periods of recycling.

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A simple one-step method to synthesize PVDF-PG/KH792 membrane for separation of oil-in-water emulsions

Journal of Water Process Engineering ◽

10.1016/j.jwpe.2021.101996 ◽

2021 ◽

Vol 41 ◽

pp. 101996

Author(s):

Jianxin Chen ◽

Zhixuan Zhang ◽

Jian Han ◽

Liang Ren ◽

Tian Tian ◽

...

Keyword(s):

Step Method ◽

Oil In Water ◽

One Step

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Edible CaCO3 nanoparticles stabilized Pickering emulsion as calcium‐fortified formulation

Journal of Nanobiotechnology ◽

10.1186/s12951-021-00807-6 ◽

2021 ◽

Vol 19 (1) ◽

Author(s):

Xiaoming Guo ◽

Xiaoying Li ◽

Leung Chan ◽

Wei Huang ◽

Tianfeng Chen

Keyword(s):

Calcium Carbonate ◽

Particle Concentration ◽

Volume Fraction ◽

Medium Chain Triglyceride ◽

Pickering Emulsion ◽

Simulated Intestinal Fluid ◽

Oral Supplementation ◽

Internal Phase ◽

Oil In Water ◽

Acid Labile

Abstract Background Nanoparticles assembled from food-grade calcium carbonate have attracted attention because of their biocompatibility, digestibility, particle and surface features (such as size, surface area, and partial wettability), and stimuli-responsiveness offered by their acid-labile nature. Results Herein, a type of edible oil-in-water Pickering emulsion was structured by calcium carbonate nanoparticles (CaCO3 NPs; mean particle size: 80 nm) and medium-chain triglyceride (MCT) for delivery of lipophilic drugs and simultaneous oral supplementation of calcium. The microstructure of the as-made CaCO3 NPs stabilized Pickering emulsion can be controlled by varying the particle concentration (c) and oil volume fraction (φ). The emulsification stabilizing capability of the CaCO3 NPs also favored the formation of high internal phase emulsion at a high φ of 0.7–0.8 with excellent emulsion stability at room temperature and at 4 °C, thus protecting the encapsulated lipophilic bioactive, vitamin D3 (VD3), against degradation. Interestingly, the structured CaCO3 NP-based Pickering emulsion displayed acid-trigged demulsification because of the disintegration of the CaCO3 NPs into Ca2+ in a simulated gastric environment, followed by efficient lipolysis of the lipid in simulated intestinal fluid. With the encapsulation and delivery of the emulsion, VD3 exhibited satisfying bioavailability after simulated gastrointestinal digestion. Conclusions Taken together, the rationally designed CaCO3 NP emulsion system holds potential as a calcium-fortified formulation for food, pharmaceutical and biomedical applications.

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