Porous Gelatin Membranes Obtained from Pickering Emulsions Stabilized with h-BNNS: Application for Polyelectrolyte-Enhanced Ultrafiltration

Mateur, Molka Nafti; Ortiz, Dánae Gonzalez; Ennigrou, Dorra Jellouli; Horchani−Naifer, Karima; Bechelany, Mikhaël; Miele, Philippe; Pochat-Bohatier, C.

doi:10.3390/membranes10070144

Cited by 7 publications

(3 citation statements)

References 62 publications

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“…This makes them highly hydrophilic, which in turn affects their permeability and rejection characteristics. The density and nature of the cross-linking play pivotal roles in determining the mechanical strength and flexibility of the membrane [32,33]. A higher cross-linking density usually leads to a stiffer but less swellable membrane.…”

Section: Fundamental Properties Of Gel-based Membranesmentioning

confidence: 99%

State-of-the-Art Advances and Current Applications of Gel-Based Membranes

Ungureanu,

Răileanu,

Zgârian

et al. 2024

Gels

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Gel-based membranes, a fusion of polymer networks and liquid components, have emerged as versatile tools in a variety of technological domains thanks to their unique structural and functional attributes. Historically rooted in basic filtration tasks, recent advancements in synthetic strategies have increased the mechanical strength, selectivity, and longevity of these membranes. This review summarizes their evolution, emphasizing breakthroughs that have positioned them at the forefront of cutting-edge applications. They have the potential for desalination and pollutant removal in water treatment processes, delivering efficiency that often surpasses conventional counterparts. The biomedical field has embraced them for drug delivery and tissue engineering, capitalizing on their biocompatibility and tunable properties. Additionally, their pivotal role in energy storage as gel electrolytes in batteries and fuel cells underscores their adaptability. However, despite monumental progress in gel-based membrane research, challenges persist, particularly in scalability and long-term stability. This synthesis provides an overview of the state-of-the-art applications of gel-based membranes and discusses potential strategies to overcome current limitations, laying the foundation for future innovations in this dynamic field.

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Section: Fundamental Properties Of Gel-based Membranesmentioning

confidence: 99%

State-of-the-Art Advances and Current Applications of Gel-Based Membranes

Ungureanu,

Răileanu,

Zgârian

et al. 2024

Gels

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“…For example, flow-induced shear causes the breakage of foulant particles that lead to pore blocking . In terms of re-engineering the design of membranes via the inclusion of functional chemistries, a popular approach has been to blend active agents, such as biocides − and/or antifouling polymers − into the body of the membrane. While this approach can effectively decrease biofouling, it is often accompanied by a trade-off in membrane performance. , Another drawback is that the bioactive moieties are located throughout the membrane as opposed to the interfacial location that is actively involved with the separation, and thus, higher loadings are required for activity .…”

Section: Introductionmentioning

confidence: 99%

Liquid-Infused Membranes Exhibit Stable Flux and Fouling Resistance

Shah

Cihanoğlu

Hardcastle

et al. 2022

ACS Appl. Mater. Interfaces

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Antifouling membranes that offer excellent operational lifetimes are critical technologies needed to meet the growing demand for clean water. In this study, we demonstrate antifouling membranes featuring an ultrathin oil layer that stayed immobilized on the surface and in the pore walls of poly(vinylidene fluoride) membranes for multiple cycles of operation at industrially relevant transmembrane pressures. An optimized quantity of a commercial Krytox oil with either a low (K103) or a high viscosity (K107) was infused onto the active surface and into the pores of membranes with a 0.45 μm pore size. The presence of the oil layer was qualitatively confirmed using crystal violet staining and variable pressure scanning electron microscopy. Using a dead-end stirred cell, a consistent pure water permeance value of 3000 L m–2 h–1 bar–1 was achieved for the K103 liquid-infused membranes for at least 10 operation cycles, which was expectedly lower than the permeance of bare control membranes (∼16 000 L m–2 h–1 bar–1), suggesting that a stable oil layer was formed on all membrane-active sites. To quantify if oil was lost during membrane operation, extensive thermogravimetric analysis was conducted on both the as-prepared and used membranes. When challenged with the microorganism, Escherichia coli K12, the liquid-infused membranes statistically reduced microbial attachment by ∼50% versus the control membranes. For the first time, we have demonstrated that by forming an immobilized, robust, and stable oil-coated membrane, we can generate high-performance membranes with stable permeance values that can be operated at relevant transmembrane pressures and provide long-lasting antifouling properties.

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“…Different strategies and approaches to producing porous membranes with high permeability, good rejection rates, and antifouling properties have been conducted by many researchers for water purification. Molka Nafti Mateur et al [ 6 ] focused their study on porous gelatin membranes obtained from Pickering emulsions stabilized with hexagonal boron nitride nanosheets (h-BNNS) with the purpose of stabilizing micro-droplets of castor oil in a continuous homogeneous gelatin solution to be applied as a polyelectrolyte to enhance ultrafiltration. The steps in the membrane’s preparation were observed to be strongly influenced by the porous structure.…”

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confidence: 99%