Membrane Contact Demulsification: A Superhydrophobic ZIF-8@rGO Membrane for Water-in-Oil Emulsion Separation

Gu, Jiahui; Qu, Zhou; Zhang, Xiangning; Fan, Hongwei; Li, Chunxi; Caro, Jürgen; Meng, Hong

doi:10.1016/j.eng.2022.02.017

Cited by 18 publications

(1 citation statement)

References 42 publications

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“…However, they generally have separation and retention functions only, which remains a significant challenge in the detection role due to the lack of recognition and responding functions. Metal–organic frameworks (MOFs), constructed from metal cations or clusters and organic ligands, are an intriguing class of porous crystalline materials with high adsorption capacity and rich functionalities, making MOFs attractive candidates for molecule separation and adsorption, sensing, etc. , Extensive efforts have been paid to introducing MOFs into fiber substrates to prepare hybrid membranes, demonstrating excellent potential for the integration of filtration/adsorption. − However, hybrid membranes with responsive ability are still rare. Therefore, there remains an urgent need to develop hybrid membranes with integrated filtration, adsorption, and detection functions, which should enable a new detection mode of lab-on-a-membrane.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Enabled Fast Preparation of a Metal–Organic Framework Hybrid Membrane for Filtration-Enhanced Simultaneous Separation and Detection of Aflatoxin B₁

Ma,

Zhang,

Yuan

et al. 2024

ACS Appl. Mater. Interfaces

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Mycotoxin contamination in food and the environment seriously harms human health. Sensitive and timely detection of mycotoxins is crucial. Here, we report a dual-functional hybrid membrane with absorptivity and responsiveness for fluorescentquantitative detection of mycotoxin aflatoxin B 1 (AFB 1 ). A biomineralization-inspired and microwave-accelerated fabrication method was established to prepare a hybrid membrane with a metal−organic framework (MOF) loaded in high density. The MOF presented high efficiency in capturing AFB 1 and showed fluorescence intensity alteration simultaneously, enabling a dual adsorption−response mode. Deriving from the inherent porous structure of the hybrid membrane and the absorptive/responsive ability of the loaded MOF, a filtration-enhanced detection mode was elaborated to provide a 1.67-fold signal increase compared with the conventional soaking method. Therefore, the hybrid membrane exhibited a rapid response time of 10 min and a low detection limit of 0.757 ng mL −1 , superior to most analogues in rapidity and sensitivity. The hybrid membrane also presented superior specificity, reproducibility, and anti-interference ability and even performed well in extreme environments such as strong acid or alkaline, satisfying the practical requirements for facile and infield detection. Therefore, the membrane had strong applicability in chicken feed samples, with a detection recovery between 70.6% and 101%. The hybrid membrane should have significant prospects in the rapid and in-field inspection of mycotoxins for agriculture and food.

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Section: Introductionmentioning

confidence: 99%

Microwave-Enabled Fast Preparation of a Metal–Organic Framework Hybrid Membrane for Filtration-Enhanced Simultaneous Separation and Detection of Aflatoxin B₁

Ma,

Zhang,

Yuan

et al. 2024

ACS Appl. Mater. Interfaces

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Antigravity Autonomous Superwettable Pumps for Spontaneous Separation of Oil–Water Emulsions

Wang,

Huang,

Min

et al. 2024

Small

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Oil–water separation based on superwettable materials offers a promising way for the treatment of oil–water mixtures and emulsions. Nevertheless, such separation techniques often require complex devices and external energy input. Therefore, it remains a great challenge to separate oil–water mixtures and emulsions through an energy‐efficient, economical, and sustainable way. Here, a novel approach demonstrating the successful separation of oil–water emulsions using antigravity‐driven autonomous superwettable pumps is presented. By transitioning from traditional gravity‐driven to antigravity‐driven separation, the study showcases the unprecedented success in purifying oil/water from emulsions by capillary/siphon‐driven superwettable autonomous pumps. These pumps, composed of self‐organized interconnected channels formed by the packing of superhydrophobic and superhydrophilic sand particles, exhibit outstanding separation flux, efficiency, and recyclability. The findings of this study not only open up a new avenue for oil–water emulsion separation but also hold promise for profound impacts in the field.

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Ex Situ pH‐Induced Reversible Wettability Switching for an Environmentally Robust and High‐Efficiency Stain‐Proof Coating

Li,

Wang,

Zhang

et al. 2024

Small Methods

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Developing superwetting coatings with environmental adaptability is critical for sustainable industrial applications. However, traditional anti‐wetting coatings often fall short due to their susceptibility to environmental factors (UV light, temperature, mold growth, and abrasion) and inadequate stain resistance in complex media. Herein, a durable ex situ pH‐responsive coating with reversible wettability switching, engineered by integrating hydrophobic polydimethylsiloxane and tertiary amine structures is presented. The resulting hierarchical micro‐nano surface structure, combined with a trapped air cushion, ensures low water adhesion and stable superhydrophobicity. Notably, after ex situ pH treatment, the modulation of surface N+ content synergistically interacts with polydimethylsiloxane chains, enabling a controlled transition in surface wettability from 150° to 68.5°, which can spontaneously revert to a hydrophobic state upon heating and drying. This transition enhances stain resistance in both air and underwater environments, resulting in a 17.2% increase in detergency compared to superhydrophobic controls. Moreover, the coating demonstrates remarkable durability, with no staining, peeling, or mildew growth (grade 0) even after 1500 h of UV radiation and 28 days of mildew resistance testing. This work offers a highly adaptable and stain‐resistant coating for applications in building and infrastructure protection, as well as in smart textiles designed for multi‐media decontamination.

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Membrane Contact Demulsification: A Superhydrophobic ZIF-8@rGO Membrane for Water-in-Oil Emulsion Separation

Cited by 18 publications

References 42 publications

Microwave-Enabled Fast Preparation of a Metal–Organic Framework Hybrid Membrane for Filtration-Enhanced Simultaneous Separation and Detection of Aflatoxin B₁

Microwave-Enabled Fast Preparation of a Metal–Organic Framework Hybrid Membrane for Filtration-Enhanced Simultaneous Separation and Detection of Aflatoxin B₁

Antigravity Autonomous Superwettable Pumps for Spontaneous Separation of Oil–Water Emulsions

Ex Situ pH‐Induced Reversible Wettability Switching for an Environmentally Robust and High‐Efficiency Stain‐Proof Coating

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Membrane Contact Demulsification: A Superhydrophobic ZIF-8@rGO Membrane for Water-in-Oil Emulsion Separation

Cited by 18 publications

References 42 publications

Microwave-Enabled Fast Preparation of a Metal–Organic Framework Hybrid Membrane for Filtration-Enhanced Simultaneous Separation and Detection of Aflatoxin B1

Microwave-Enabled Fast Preparation of a Metal–Organic Framework Hybrid Membrane for Filtration-Enhanced Simultaneous Separation and Detection of Aflatoxin B1

Antigravity Autonomous Superwettable Pumps for Spontaneous Separation of Oil–Water Emulsions

Ex Situ pH‐Induced Reversible Wettability Switching for an Environmentally Robust and High‐Efficiency Stain‐Proof Coating

Contact Info

Product

Resources

About

Microwave-Enabled Fast Preparation of a Metal–Organic Framework Hybrid Membrane for Filtration-Enhanced Simultaneous Separation and Detection of Aflatoxin B₁

Microwave-Enabled Fast Preparation of a Metal–Organic Framework Hybrid Membrane for Filtration-Enhanced Simultaneous Separation and Detection of Aflatoxin B₁