Large, Rapid Swelling of High-cis Polydicyclopentadiene Aerogels Suitable for Solvent-Responsive Actuators

Chriti, Despoina; Raptopoulos, Grigorios; Brandenburg, Benjamin; Paraskevopoulou, Patrina

doi:10.3390/polym12051033

Cited by 7 publications

(4 citation statements)

References 91 publications

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“…DCPD of very high purity (poly-DCPD) is mainly used for the preparation of so-called formulated mixtures [18], which are used in the reactive injection. The resulting solid objects have good impact resistance in a wide range of temperatures.…”

Section: Dicyclopentadiene Usesmentioning

confidence: 99%

New Technology for Production of Dicyclopentadiene and Methyl-Dicyklopentadiene

et al. 2022

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ORLEN Unipetrol’s Steam Cracking unit processes a wide range of hydrocarbons from gases to heavy oils produced in refinery processes. Due to the heavy feedstock, the Steam Cracking unit can produce very valuable hydrocarbons such as cyclopentadiene and dicyclopentadiene in addition to ethylene, propylene and benzene. These hydrocarbons can be obtained and used as very profitable monomers for many other chemical applications. ORLEN Unipetrpol, in cooperation with the University of Chemistry and Technology in Prague, has developed a technology for the isolation of technical dicyclopentadiene of both medium purity grades and high purity grades. Making DCPD grades will add considerable value to the raw C5 by-product stream from the Steam Cracker pyrolysis gasoline. The capacity of the new existing DCPD unit is expected to be in the range of 20–26 thousand metric tons per year, depending on the derivative product portfolio and purity of the DCPD. The construction of the unit started in September 2020, and production is expected to be launched in the second half of 2022.

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Section: Dicyclopentadiene Usesmentioning

confidence: 99%

New Technology for Production of Dicyclopentadiene and Methyl-Dicyklopentadiene

et al. 2022

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“…Indeed, IUPAC has recently announced aerogels in the 2022 top ten emerging technologies in Chemistry [106]. The areas of application include, but are not limited to, thermal (their flagship application) [85,[107][108][109][110][111][112][113][114] and acoustic insulation [108,109,114], space applications [108,115], transparent materials [116][117][118] energy storage [99,107,[119][120][121], dielectrics [108], gas and humidity adsorption [108,112,[122][123][124][125], sensors [114,122], actuators [126][127][128], catalysis [99,112,122,124,[129][130][131][132][133], biomedicine [134,135], the food industry…”

Section: Aerogelsmentioning

confidence: 99%

Uranium Removal from Aqueous Solutions by Aerogel-Based Adsorbents – A critical review

Georgiou¹,

Raptopoulos²,

Anastopoulos³

et al. 2022

Preprint

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Aerogel-based adsorbents present extraordinary sorption capacity for hexavalent uranium that can be as high as 8.8 mol kg–1 (2088 g kg–1). The adsorption data follow generally the Langmuir isotherm model and the kinetic data are better described by the pseudo-second-order kinetic model, which is associated with chemisorption. Evaluation of the thermodynamic data reveals that the adsorption is generally an endothermic, entropy-driven process (ΔHo, ΔSo > 0). Spectroscopic studies (e.g., FTIR, XPS) indicate that the adsorption is based on the formation of in-ner-sphere complexes between surface active moieties and the uranyl cation. Regeneration and uranium recovery by acidification and complexation using carbonate or chelating ligands (e.g., EDTA) have been found to be successful. The application of aerogel-based adsorbents to uranium removal from industrial processes and uranium-contaminated waste waters was also successful, assuming that these materials could be very attractive as adsorbents in water treatment and uranium recovery technologies. However, the selectivity of the studied materials towards hexavalent uranium is limited suggesting further development of aerogel materials which could be modified by surface derivatization with chelating agents (e.g., salophen, iminodiacetate) presenting high selectivity for uranyl moieties.

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“…Indeed, IUPAC has recently announced aerogels in the 2022 top ten emerging technologies in chemistry [ 107 ]. The areas of application include, but are not limited to, thermal (their flagship application) [ 86 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 ] and acoustic insulation [ 109 , 110 , 115 ], space applications [ 109 , 116 ], transparent materials [ 117 , 118 , 119 ] energy storage [ 100 , 108 , 120 , 121 ], dielectrics [ 109 ], gas and humidity adsorption [ 109 , 113 , 122 , 123 , 124 , 125 ], sensors [ 115 , 122 ], actuators [ 126 , 127 , 128 ], catalysis [ 100 , 113 , 122 , 124 , 129 , 130 , 131 , 132 , 133 ], biomedicine [ 134 , 135 ], the food industry […”

Section: Introductionmentioning

confidence: 99%

Uranium Removal from Aqueous Solutions by Aerogel-Based Adsorbents—A Critical Review

et al. 2023

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Aerogels are a class of lightweight, nanoporous, and nanostructured materials with diverse chemical compositions and a huge potential for applications in a broad spectrum of fields. This has led the IUPAC to include them in the top ten emerging technologies in chemistry for 2022. This review provides an overview of aerogel-based adsorbents that have been used for the removal and recovery of uranium from aqueous environments, as well as an insight into the physicochemical parameters affecting the adsorption efficiency and mechanism. Uranium removal is of particular interest regarding uranium analysis and recovery, to cover the present and future uranium needs for nuclear power energy production. Among the methods used, such as ion exchange, precipitation, and solvent extraction, adsorption-based technologies are very attractive due to their easy and low-cost implementation, as well as the wide spectrum of adsorbents available. Aerogel-based adsorbents present an extraordinary sorption capacity for hexavalent uranium that can be as high as 8.8 mol kg–1 (2088 g kg–1). The adsorption data generally follow the Langmuir isotherm model, and the kinetic data are in most cases better described by the pseudo-second-order kinetic model. An evaluation of the thermodynamic data reveals that the adsorption is generally an endothermic, entropy-driven process (ΔH0, ΔS0 > 0). Spectroscopic studies (e.g., FTIR and XPS) indicate that the adsorption is based on the formation of inner-sphere complexes between surface active moieties and the uranyl cation. Regeneration and uranium recovery by acidification and complexation using carbonate or chelating ligands (e.g., EDTA) have been found to be successful. The application of aerogel-based adsorbents to uranium removal from industrial processes and uranium-contaminated waste waters was also successful, assuming that these materials could be very attractive as adsorbents in water treatment and uranium recovery technologies. However, the selectivity of the studied materials towards hexavalent uranium is limited, suggesting further developments of aerogel materials that could be modified by surface derivatization with chelating agents (e.g., salophen and iminodiacetate) presenting high selectivity for uranyl moieties.

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Large, Rapid Swelling of High-cis Polydicyclopentadiene Aerogels Suitable for Solvent-Responsive Actuators

Cited by 7 publications

References 91 publications

New Technology for Production of Dicyclopentadiene and Methyl-Dicyklopentadiene

New Technology for Production of Dicyclopentadiene and Methyl-Dicyklopentadiene

Uranium Removal from Aqueous Solutions by Aerogel-Based Adsorbents – A critical review

Uranium Removal from Aqueous Solutions by Aerogel-Based Adsorbents—A Critical Review

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