Emulsion-templated, hydrophilic-oleophobic aerogels with flexibility, stretchability and recyclability

Yang, Shangyun; Xu, Zhiguang; Zhang, Tao; Zhao, Yan

doi:10.1016/j.polymer.2022.124886

Cited by 6 publications

(2 citation statements)

References 43 publications

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“…Moreover, PVA-65 showed elasticity, with a tensile strain below 10% (Figure S4d), and the tensile stress–strain behaviors could be repeated over 50 times without an obvious change, showing good stability. To the best of our knowledge, there are very few emulsion-templated systems exhibiting stretchability , due to the commonly low content of polymer within the continuous phase. The stretchability of the PVA- X s might result from the relatively low degree of cross-linking of PVA, and the stretchability facilitates the PVA- X s for many potential applications related to motion.…”

Section: Resultsmentioning

confidence: 99%

Octadecane-Encapsulated, Polyurethane PolyHIPE Composites with Flexibility and Stretchability for Personal Heat Management

Xu,

Chen,

Wang

et al. 2023

ACS Appl. Polym. Mater.

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Emulsion-templated, phase change material-encapsulated monolithic composites are advantageous for latent heat storage, but their infrared behavior and lack of stretchability hamper many more potential applications. Here, we report the fabrication of octadecane (OD)-encapsulated monolithic composites with flexibility and stretchability and their application for personal heat management for the first time. The composites were formed from interfacial cross-linking between isocyanate and poly(vinyl alcohol), which served as a monomer and an emulsion stabilizer. The composites showed flexibility over or slightly below the ambient temperature, robust compression (without leakage and fracture at 70% compressive strain), and high stretchability with tensile strain up to 30%. The heat storage and release temperatures were similar to that of OD, close to human body temperature, and the composites exhibited quite high heat density (up to 231.6 J g–1) and high reusability (without obvious decreases in heat density after 400 heating–cooling cycles). Moreover, the composites were verified effectively to decrease mean skin temperature and mean torso temperature of the human body, demonstrating to be a good candidate for personal heat management.

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Section: Resultsmentioning

confidence: 99%

Octadecane-Encapsulated, Polyurethane PolyHIPE Composites with Flexibility and Stretchability for Personal Heat Management

Xu,

Chen,

Wang

et al. 2023

ACS Appl. Polym. Mater.

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“…To solve these issues, we recently developed a one-pot method to fabricate hydrophilic–oleophobic porous polymers, mainly including polyHIPEs and emulsion templated aerogels. − These polyHIPEs and emulsion templated aerogels were fabricated from oil-in-water high internal phase emulsions (HIPEs, emulsions with the dispersed phase over 74% by volume) via interface-initiated polymerization of dispersed fluorinated monomers, such as 1H,1H,2H,2H-tridecafluoron-octyl acrylate (TFOA) and 1H,1H,2H,2H-perfluorooctyltriethoxysilane. , For emulsion templating method, however, a large amount of emulsion stabilizers and dispersed organic solvents are required, and after the formation of porous polymers, the stabilizers and the dispersed phase should be removed. ,, The high cost, imposed by the large amount of the emulsion stabilizers and solvents as well as by their removal, and potential environmental issues related to the emulsion stabilizers and the solvents, hinder the resulting polyHIPEs and emulsion templated aerogels from real applications. , Moreover, the preparation of hydrophilic–oleophobic macroporous polymers from both the two-step coating and the one-pot emulsion templating is usually time-consuming. Therefore, for practical applications, new strategies are required to rapidly fabricate porous polymers with hydrophilicity and oleophobicity.…”

Section: Introductionmentioning

confidence: 99%

Hydrophilic–Oleophobic, Macroporous Polymers Enabled by In-Situ Polymerization and Foaming for Removing Water from Oils

Chi,

Xu,

Cao

et al. 2023

Langmuir

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Porous polymers with hydrophilicity and oleophobicity are promising for removing water from various oil–water mixtures (including emulsions), but the preparation of such polymers is usually complicated and time-consuming. Herein, a novel stragey, in situ polymerization and foaming, has been developed to fabricate hydrophilic–oleophobic porous polymers in a facile manner within seconds. The porous polymers from pentaerythritol tetra(3-mercaptopropionate) and poly(ethylene glycol) diacrylate showed hydrophilicity and underwater oleophobicity, enabling the removal of water from oil–water mixtures and surfactant-stabilized, water-in-oil (w/o) emulsions, with a high efficiency of 99.9% and excellent reusability, without obvious deterioation after 10 cycles. With incorporatin of 1H,1H,2H,2H-perfluorooctyl methacrylate, the resulting porous polymers showed hydrophilicity and oleophobicty in air, providing an additional function of antioil-fouling ability both in dry state and in the process of oil–water separation. Moreover, both the two types of the porous polymers showed robust compression, without fracture and changes in wetting property after cycles of compression at 70% strain and high fatigue-resistant elasticity, without obvious plastic deformation after 1000 compression-release cycles. The facile and rapid preparation, hydrophiclity–oleophobicity, and robustness in compression and elasticity enabled the porous polymers to be good candidates for removing water from various oil–water mixtures.

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Semi-IPN hydrogel-modified stainless-steel mesh mixed with SiO2 is used for oil–water separation

Wu,

Xue,

Zhang

et al. 2024

J Coat Technol Res

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Emulsion-templated, hydrophilic-oleophobic aerogels with flexibility, stretchability and recyclability

Cited by 6 publications

References 43 publications

Octadecane-Encapsulated, Polyurethane PolyHIPE Composites with Flexibility and Stretchability for Personal Heat Management

Octadecane-Encapsulated, Polyurethane PolyHIPE Composites with Flexibility and Stretchability for Personal Heat Management

Hydrophilic–Oleophobic, Macroporous Polymers Enabled by In-Situ Polymerization and Foaming for Removing Water from Oils

Semi-IPN hydrogel-modified stainless-steel mesh mixed with SiO2 is used for oil–water separation

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