Rapid and efficient oil removal from O/W emulsions by hydrophobic porous polystyrene microspheres embedded with hydrophilic surface micro-regions

Xie, Xiaowen; Yan, Jingfan; Wu, Qiong; Wang, Tianyu; Chu, Fumin; Yang, Sen

doi:10.1016/j.jhazmat.2022.128898

Cited by 19 publications

(8 citation statements)

References 49 publications

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“…The surface hydrophobicity of proteins in the emulsion was determined by ANS fluorescent probe (Xie et al, 2022). Firstly, the emulsion proteins under different enzymatic hydrolysis conditions were weighed and dissolved in 0.01 mol/L phosphate buffer with pH 7.0, then the resulting mixture was stirred at 25 °C for an hour and centrifuged at 10000 r/min at 4 °C for 30 min, later, the samples of each group were diluted with 0.01 mol/L phosphate buffer solution with pH 7.0 to obtain 5 protein solutions with concentration gradients of 0.02, 0.04, 0.06, 0.08 and 0.1 mg/mL respectively.…”

Section: Determination Of Protein Surface Hydrophobicity In Emulsionmentioning

confidence: 99%

Effect of enzyme types on emulsifying properties of walnut emulsion

et al. 2023

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In order to explore the efficient investigate and utilization of emulsion produced by enzyme-assisted aqueous extraction of walnut oil, the effects of different enzyme treatment (including Alcalase 2.4L, Ban 480L α-amylase, Neutrase 0.8L, Pectinex SP-L, Celluclast 1.5L) on the characteristics of emulsion were studied to characterize its emulsifying characteristics The emulsion composition, particle size distribution, Zeta potential, rheological properties and protein surface hydrophobicity of emulsion were determined to characterize its emulsifying properties. The results showed that the particle size of the emulsion obtained from enzymatic hydrolysis showed a smaller trend and the absolute value of Zeta potential showed a larger trend in the presence of enzymes. On emulsion protein, hydrophobicity of emulsion protein was obtained by hydrolysis with different enzymes showed that the trend followed the order: Celluclast 1.5L> Ban 480L >Neutrase 0.8L >Pectinex SP-L >control> Alcalase 2.4L.The particle size, zeta potential, ability to increase emulsion viscosity and interfacial hydrophobicity of emulsion proteins affected the emulsion physical stability and the effect of demulsification. The results of rheological analysis show that emulsions from Ban 480L α-amylase, Neutrase 0.8L and Celluclast 1.5L hydrolysate still maintained their elastic structure damaged by shear rate and were more stable, and the emulsions obtained by Alcalase 2.4L and Pectinex SP-L were unstable which was easy to be broken.

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Section: Determination Of Protein Surface Hydrophobicity In Emulsionmentioning

confidence: 99%

Effect of enzyme types on emulsifying properties of walnut emulsion

et al. 2023

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“…However, most of them are non-hydrophilic materials with poor mass transfer performance. 15 For example, styrene polymer [16][17][18] and polypropylene fiber material 19,20 have poor dispersion in aqueous phase catalysis due to their hydrophobicity during the immobilization process, which often leads to the loss of enzyme activity to a certain extent. Therefore, the effective way to solve this problem in the catalysis of the aqueous phase is to controllably synthesize the porous network structure by using hydrophilic carriers.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of hydrogel microspheres with tunable pore size and their application in alkaline protease immobilization

Yin,

Wang,

et al. 2024

New J. Chem.

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“…With the increasing consumption of petroleum products and rapid development of industrialization, oily wastewater produced from industrial manufacturing and chemical leakage present an enormous menace to human health and the ecological environment. − Therefore, how to separate the oil/water mixture effectively becomes a top priority and has attracted considerable attention. Based on the oil dispersions in water, oily wastewater is generally classified as floating oil, dispersed oil, and emulsified oil . Among these forms, a surfactant-stabilized emulsion has high stability and small oil droplet sizes, which makes the emulsified oil difficult to separate .…”

Section: Introductionmentioning

confidence: 99%

“…Based on the oil dispersions in water, oily wastewater is generally classified as floating oil, dispersed oil, and emulsified oil. 4 Among these forms, a surfactant-stabilized emulsion has high stability and small oil droplet sizes, which makes the emulsified oil difficult to separate. 5 Traditional separation technologies, for instance, gravity separation, 6 centrifugation, 7 skimming, 8 and microwave radiation, 9 are mainly used to separate floating and dispersed oil.…”

Section: Introductionmentioning

confidence: 99%

Polyethylenimine-Modified Glass Fiber by a Sulfur-Based Coupling Reaction for Selective Demulsification of Oil/Water Emulsions

Wang

Zhang

Yasin

et al. 2023

ACS Appl. Polym. Mater.

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Separating oily wastewater, especially surfactant-stabilized emulsions, is an urgent problem to solve because of its severe threats to the environment and human health. Polyethylenimine (PEI) molecules with abundant amine groups could reduce the stability of emulsions. Herein, PEI-modified glass fiber (GF) was fabricated using a facile and effective surface modification strategy: a sulfur-based three-component coupling reaction between PEI and (γ-aminopropyl)triethoxysilane-treated GF. After wet-laying the fabric, the obtained membranes presented superamphiphilicity in air, underwater superoleophobicity, and positive surface charges in water. Based on electrostatic and hydrogen-bond interactions originating from PEI, the prepared membranes exhibited different separation efficiencies from the oil-in-water emulsions prepared using anionic, nonionic, zwitterionic, and cationic surfactants. The separation efficiency was only 31.8% for the emulsion stabilized by a cationic surfactant and raised to over 94.7% for the emulsion stabilized by anionic, nonionic, and zwitterionic surfactants. In particular, it was observed that different emulsion droplets displayed various adsorption–coalescence phenomena on the prepared membranes, and a mechanism of selective demulsification was further proposed. These results suggest that the fabrication strategy is beneficial to fabricating membranes with outstanding separation efficiency.

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Rapid and efficient oil removal from O/W emulsions by hydrophobic porous polystyrene microspheres embedded with hydrophilic surface micro-regions

Cited by 19 publications

References 49 publications

Effect of enzyme types on emulsifying properties of walnut emulsion

Effect of enzyme types on emulsifying properties of walnut emulsion

Synthesis of hydrogel microspheres with tunable pore size and their application in alkaline protease immobilization

Polyethylenimine-Modified Glass Fiber by a Sulfur-Based Coupling Reaction for Selective Demulsification of Oil/Water Emulsions

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