Monodisperse macroporous microspheres prepared by microfluidic methods and their oil adsorption performance

Yu, Yingying; Zhao, Mingxin; Cao, Xue-Ru; Zhou, Tongxiao

doi:10.1016/j.colsurfa.2019.123617

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…Therefore, the microfluidic method for the preparation of microspheres has been introduced to minimize these limitations. The microfluidic methods can offer several extraordinary features including good monodispersity, uniform particle size, as well as morphology and controlled formations of droplets by the flow rate of phases to the microspheres . Moreover, the preparation of microspheres in large quantities can be achieved through multichannels.…”

Section: Preparation Of Nutraceutical Delivery System By Microfluidic...mentioning

confidence: 99%

Microfluidic Assembly: An Innovative Tool for the Encapsulation, Protection, and Controlled Release of Nutraceuticals

Liu

Singh

Zhang

et al. 2021

J. Agric. Food Chem.

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Nutraceuticals have been gradually accepted as food ingredients that can offer health benefits and provide protection against several diseases. It is widely accepted due to potential nutritional benefits, safety, and therapeutic effects. Most nutraceuticals are vulnerable to the changes in the external environment, which leads to poor physical and chemical stability and absorption. Several researchers have designed various encapsulation technologies to promote the use of nutraceuticals. Microfluidic technology is an emerging approach which can be used for nutraceutical delivery with precise control. The delivery systems using microfluidic technology have obtained much interest in recent years. In this review article, we have summarized the recently introduced nutraceutical delivery platforms including emulsions, liposomes, microspheres, microgels, and polymer nanoparticles based on microfluidic techniques. Emphasis has been made to discuss the advantages, preparations, characterizations, and applications of nutraceutical delivery systems. Finally, the challenges, several up-scaling methods, and future expectations are discussed.

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Section: Preparation Of Nutraceutical Delivery System By Microfluidic...mentioning

confidence: 99%

Microfluidic Assembly: An Innovative Tool for the Encapsulation, Protection, and Controlled Release of Nutraceuticals

Liu

Singh

Zhang

et al. 2021

J. Agric. Food Chem.

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“…Higher O 1 content means more potential pore volume, but excess O 1 cannot be incorporated in micelles to form stable nanodroplets, leading to the formation of unwanted macropores in 2% FS (20% O 1 ). Several previous studies also proved that excess inner droplets can form high internal phase emulsions, 31,47 in which macropores are dominant. For example, Mazaj et al 35 used 80% toluene as oil phase to prepare O/W emulsions under intense agitation, and after oil removal and carbonization, the formed macropores were of size around 15 μm.…”

Section: ■ Results and Discussionmentioning

confidence: 80%

“…For example, droplets can be used as pore-forming templates by occupying positions in another liquid. Zhang et al 30 and Yu et al 31 created a macroporous structure in polymer microspheres by the diffusion of water droplets in surfactant-excess oil phase. Moreover, Zhang et al 32 tailored mesopores around 3.4−3.8 nm by oil nanodroplets through improving the time of homogenization.…”

Section: ■ Introductionmentioning

confidence: 99%

Continuous Synthesis of Nanodroplet-Templated, N-Doped Microporous Carbon Spheres in Microfluidic System for CO₂ Capture

Jin

Jiang

Dai

et al. 2020

ACS Appl. Mater. Interfaces

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Microporous carbon has been widely known as a probable material to capture greenhouse gases. This work provides a facile synthesis of monodisperse biomass-derived microporous carbon spheres (CSs) for effective CO 2 capture. The spheres were synthesized by a novel continuous microfluidic strategy from oil-inwater-in-oil ((O 1 /W 2 )/O 2 ) emulsions. O 1 nanodroplets could be self-assembled into the cores of micelles, which were formed by chitosan and surfactant F127 in the W 2 phase through high-speed liquid-phase shearing. The obtained O 1 /W 2 emulsion can be further sheared into a sphere by the O 2 phase. After carbonization, nanodroplet-templated pores shrank to micropores and ultramicropores. The optimal sample showed the developed pore structure with a Brunauer−Emmett−Teller (BET) surface area of 576 m 2 /g and microporous volume of 0.22 cm 3 /g. Compared with O 1 free CS, the dynamic adsorption capacity of CO 2 was improved to 1.20 mmol/g from 0.42 mmol/g. The CO 2 capture capacity, cycling stability, isosteric heats, and mass diffusion coefficient of CSs were evaluated as well. The results demonstrate that microporous CSs are promising candidates for CO 2 capture with low cost and a green synthesis route, which was achieved via continuous microfluidic strategy using sustainable biomass chitosan as a carbon precursor and droplets as templates.

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“…The monodispersity of microcapsule samples is evaluated with an index called the coefficient of variation (CV), which is defined as the ratio of the standard deviation of size distribution to its arithmetic mean (Yu, Zhao, et al, 2019) (Fang et al, 2019). To analyze the particle size distribution and monodispersity of capsules, vacant, immobilized bacterial, and thermo-responsive immobilized bacterial CA capsules were prepared, respectively.…”

Section: Characterizationmentioning

confidence: 99%

The treatment of oily wastewater by thermo‐responsive calcium alginate capsules immobilized Pseudomonas aeruginosa

Lin,

Zhao,

et al. 2024

Water Environment Research

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A microfluidic strategy of smart calcium alginate (CA) capsules is presented to immobilize Pseudomonas aeruginosa to treat oil slicks effectively. The capsule wall is embedded with poly (N‐isopropyl acrylamide) sub‐microspheres as thermo‐responsive switches. CA capsules, with a diameter of 3.26 mm and a thin wall thickness about 12.8 μm, have satisfying monodispersity, cavity structure, and dense surface structures. The capsules possess excellent encapsulation of bacteria, which are fixed in a restricted space and become more aggregated. It overcomes the disadvantages of a long fermentation production cycle, easy loss of bacteria, and susceptibility to shear effect. The smart CA capsules immobilized with bacteria treat model wastewater containing soybean oil or diesel and display favorable fermentation ability. The capsules can effectively treat oil slicks with high concentration, and it is an economical way for processing oily wastewater.Practitioner Points A thermo‐responsive calcium alginate capsule was prepared by microfluidic strategy. Pseudomonas aeruginosa is environmentally friendly in treating oil slicks. The capsules, immobilized bacteria, treat oil slicks effectively. This study provides an economical way for processing different oily water.

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Monodisperse macroporous microspheres prepared by microfluidic methods and their oil adsorption performance

Cited by 11 publications

References 32 publications

Microfluidic Assembly: An Innovative Tool for the Encapsulation, Protection, and Controlled Release of Nutraceuticals

Microfluidic Assembly: An Innovative Tool for the Encapsulation, Protection, and Controlled Release of Nutraceuticals

Continuous Synthesis of Nanodroplet-Templated, N-Doped Microporous Carbon Spheres in Microfluidic System for CO₂ Capture

The treatment of oily wastewater by thermo‐responsive calcium alginate capsules immobilized Pseudomonas aeruginosa

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Monodisperse macroporous microspheres prepared by microfluidic methods and their oil adsorption performance

Cited by 11 publications

References 32 publications

Microfluidic Assembly: An Innovative Tool for the Encapsulation, Protection, and Controlled Release of Nutraceuticals

Microfluidic Assembly: An Innovative Tool for the Encapsulation, Protection, and Controlled Release of Nutraceuticals

Continuous Synthesis of Nanodroplet-Templated, N-Doped Microporous Carbon Spheres in Microfluidic System for CO2 Capture

The treatment of oily wastewater by thermo‐responsive calcium alginate capsules immobilized Pseudomonas aeruginosa

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Continuous Synthesis of Nanodroplet-Templated, N-Doped Microporous Carbon Spheres in Microfluidic System for CO₂ Capture