Poly(hydromethylsiloxane)-derived high internal phase emulsion-templated materials (polyHIPEs) containing palladium for catalytic applications

Mrówka, Jan; Kosydar, Robert; Gackowski, Mariusz; Gurgul, Jacek; Lityńska‐Dobrzyńska, Lidia; Handke, B.; Drelinkiewicz, A.; Hasik, Magdalena

doi:10.1007/s10853-022-07414-2

Cited by 3 publications

(1 citation statement)

References 46 publications

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“…The conditions used to form HIPEs and process the poly-HIPEs dictate the pore size, interconnects, voids, and windows [6]. Due to their tunable pore morphology, permeability, and low density, polyHIPEs have been used in diverse applications, including gas adsorption [7], water treatment [8][9][10], catalyst supports [11], sensing [12,13], and tissue engineering [14].…”

Section: Introductionmentioning

confidence: 99%

Electrically conductive porous Ti₃C₂T _x MXene-polymer composites from high internal phase emulsions (HIPEs)

Cao

Wang²,

Sarmah³

et al. 2022

2D Mater.

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Porous MXene-polymer composites have gained attention due to their lightweight properties, large surface area, and high electrical conductivity, which can be used in applications such as electromagnetic interference (EMI) shielding, sensing, energy storage, and catalysis. High internal phase emulsions (HIPEs) can be used to template the synthesis of porous polymer structures, and when solid particles are used as the interfacial agent, composites with pores lined with the particles can be realized. Here, we report a simple and scalable method to prepare conductive porous MXene/polyacrylamide structures via polymerization of the continuous phase in oil/water HIPEs. The HIPEs are stabilized by salt flocculated Ti3C2Tz nanosheets, without the use of a co-surfactant. After polymerization, the polyHIPE structure consists of porous polymer struts and pores lined with Ti3C2Tz nanosheets, as confirmed by scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. The pore size can be tuned by varying the Ti3C2Tz concentration, and the interconnected Ti3C2Tz network allows for electrical percolation at low Ti3C2Tz loading; further, the electrical conductivity is stable for months indicating that in these composites, the nanosheets are stable to oxidation at ambient conditions. The Ti3C2Tz polyHIPEs also exhibit rapid radio frequency heating at low power (10 °C/s at 1W). This work demonstrates a simple approach to accessing electrically conductive porous MXene/polymer composites with tunable pore morphology and good oxidation stability of the nanosheets.

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Section: Introductionmentioning

confidence: 99%

Electrically conductive porous Ti₃C₂T _x MXene-polymer composites from high internal phase emulsions (HIPEs)

Cao

Wang²,

Sarmah³

et al. 2022

2D Mater.

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Synthesis of Functionalized PDMS Fluids by Linear Chlorinated Phosphazene Acid Catalyst

Jin,

Zhang,

Yang

et al. 2024

Silicon

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Macroporous Poly(hydromethylsiloxane) Networks as Precursors to Hybrid Ceramics (Ceramers) for Deposition of Palladium Catalysts

Mrówka,

Kosydar,

Kornaus

et al. 2024

Molecules

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Poly(hydromethylsiloxane) (PHMS) was cross-linked with 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane (D4Vi) in water-in-oil High Internal Phase Emulsions to form macroporous materials known as polyHIPEs. It was shown that in the process of pyrolysis under Ar atmosphere at 520 °C, the obtained polyHIPEs were converted to ceramers with high yields (82.8–88.0 wt.%). Structurally, the obtained ceramers were hybrid ceramics, i.e., they consisted of Si-O framework and preserved organic moieties. Macropores present in the polyHIPE precursors remained in ceramers. Ceramers contained also micro- and mesopores which resulted from the precursor’s mass loss during pyrolysis. Total pore volume and BET specific surface area related to the existence of micro- and mesopores in ceramers depended on the PHMS: D4Vi ratio applied in polyHIPE synthesis. The highest total pore volume (0.143 cm3/g) and specific surface area (344 m2/g) were reached after pyrolysis of the precursor prepared with the lowest amount of D4Vi as compared to PHMS. The composite materials obtained after deposition of PdO nanoparticles onto ceramers followed by reduction of PdO by H2 were active and selective catalysts for phenylacetylene hydrogenation to styrene.

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Poly(hydromethylsiloxane)-derived high internal phase emulsion-templated materials (polyHIPEs) containing palladium for catalytic applications

Cited by 3 publications

References 46 publications

Electrically conductive porous Ti₃C₂T _x MXene-polymer composites from high internal phase emulsions (HIPEs)

Electrically conductive porous Ti₃C₂T _x MXene-polymer composites from high internal phase emulsions (HIPEs)

Synthesis of Functionalized PDMS Fluids by Linear Chlorinated Phosphazene Acid Catalyst

Macroporous Poly(hydromethylsiloxane) Networks as Precursors to Hybrid Ceramics (Ceramers) for Deposition of Palladium Catalysts

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Poly(hydromethylsiloxane)-derived high internal phase emulsion-templated materials (polyHIPEs) containing palladium for catalytic applications

Cited by 3 publications

References 46 publications

Electrically conductive porous Ti3C2T x MXene-polymer composites from high internal phase emulsions (HIPEs)

Electrically conductive porous Ti3C2T x MXene-polymer composites from high internal phase emulsions (HIPEs)

Synthesis of Functionalized PDMS Fluids by Linear Chlorinated Phosphazene Acid Catalyst

Macroporous Poly(hydromethylsiloxane) Networks as Precursors to Hybrid Ceramics (Ceramers) for Deposition of Palladium Catalysts

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Electrically conductive porous Ti₃C₂T _x MXene-polymer composites from high internal phase emulsions (HIPEs)

Electrically conductive porous Ti₃C₂T _x MXene-polymer composites from high internal phase emulsions (HIPEs)