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The wettability of the proppant is crucial in optimizing the flowback of fracturing fluids and improving the recovery of the produced hydrocarbons. Neutral wet proppants have been proven to improve the fluid flow by reducing the interaction between the fluid and the proppant surface. In this study, a lightweight amphiphobic proppant (LWAP) was prepared by coating a lightweight ceramic proppant (LWCP) with phenolic resin, epoxy resin, polytetrafluoroethylene (PTFE), and trimethoxy(1H,1H,2H,2H-heptadecafluorodecyl)silane (TMHFS) using a layer-by-layer method.

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The membrane fouling derived from the accumulated dust pollutants and highly viscous oily particles causes irreversible damage to the filtration performance of air filters and results in a significant reduction in their service life. However, it is still challenging to construct high-efficiency and antifouling air filtration membranes with recyclable regeneration. Herein, the fluorine-free amphiphobic micro/nanofiber composite membrane was controllably constructed by integrating click chemistry reaction and electrospinning technique.

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Dynamic Phase Behavior of Surface-Active Fluorinated Ionic Liquid Epoxidation Catalysts.

Chemistry

December 2024

Technical University of Munich, Catalysis Research Center and School of Natural Sciences, Department of Chemistry, Ernst-Otto-Fischer-Straße 1, D-85748, Garching bei München, Germany.

Article Synopsis
  • Researchers developed a new type of amphiphobic fluorinated surface-active ionic liquid (FSAIL) that can dissolve in water based on temperature changes.
  • The FSAILs, containing specific anions, showed reduced solubility in both water and organic solvents compared to similar compounds without fluorine.
  • These FSAILs effectively catalyzed the epoxidation of olefins using hydrogen peroxide, demonstrating high efficiency and the ability to be reused through phase separation and distillation after ten cycles.
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Molecular Modeling of the Fluorination Effect on the Penetration of Nanoparticles across Lipid Bilayers.

Langmuir

January 2024

Center for Soft Condensed Matter Physics and Interdisciplinary Research, School of Physical Science and Technology, Soochow University, Suzhou 215006, China.

The fluorinated decorations have recently been widely used in many biomedical applications. However, the potential mechanism of the fluorination effect on the cellular delivery of nanoparticles (NPs) still remains elusive. In this work, we systemically explore the penetration of a perfluoro-octanethiol-coated gold NP (PF-Au NP) and, for comparison, an octanethiol-coated gold NP (OT-Au NP) across lipid bilayers.

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Development of a Carbon Nanotube-Enhanced FAS Bilayer Amphiphobic Coating for Biological Fluids.

Nanomaterials (Basel)

December 2023

Department of Chemistry and Environmental Science, New Jersey Institute of Technology, 161 Warren Street, Newark, NJ 07102, USA.

This study reports the development of a novel amphiphobic coating. The coating is a bilayer arrangement, where carbon nanotubes (CNTs) form the underlayer and fluorinated alkyl-silane (FAS) forms the overlayer, resulting in the development of highly amphiphobic coatings suitable for a wide range of substrates. The effectiveness of these coatings is demonstrated through enhanced contact angles for water and artificial blood plasma fluid on glass, stainless steel, and porous PTFE.

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