Aerogels with a Microporous Crystalline Host Phase

Daniel, Christophe; Alfano, Davide; Venditto, Vincenzo; Cardea, Stefano; Reverchon, Ernesto; Larobina, Domenico; Mensitieri, Giuseppe; Guerra, Gaetano

doi:10.1002/adma.200401762

Cited by 186 publications

(199 citation statements)

References 35 publications

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“…1,2 It has been shown that CO2 extraction of s-PS thermoreversible gels leads to a special class of monolithic physically crosslinked aerogels, where the crystallites that constitute the physical knots of the aerogel exhibit a nanoporous crystalline phase. [3][4][5] These nanoporous crystalline aerogels present, beside disordered amorphous mesoand macropores (typical of all aerogels), also all identical nanopores of the crystalline phases.…”

Section: Introductionmentioning

confidence: 99%

“…Solvent extraction from s-PS gels can be achieved in supercritical conditions without the shrinkage of the gel and monolithic aerogels with apparent density in the range 0.004-0.5 g/cm 3 and apparent porosity as high as 99.5% to can be easily prepared (see Figure 1).…”

Section: Structure and Morphology Of S-ps Aerogelsmentioning

confidence: 99%

“…6 This result is due to the formation of a spherulic morphology in PPO gels rather than a fibrillar morphology as observed in s-PS gels. 3,5 However it has been shown that monolithic PPO based aerogels with nanoporous crystalline phases can easily be obtained starting from mixed PPO/s-PS gels thanks to fibrillar morphology ensured by s-PS. 6 The association of amorphous meso-and macropores and crystalline nanopores confers unique properties to this new type of material.…”

Section: Introductionmentioning

confidence: 99%

“…6 The association of amorphous meso-and macropores and crystalline nanopores confers unique properties to this new type of material. In particular sorption studies of VOC from aqueous diluted solutions 4,5,6 or from air at low vapor pressures 3 have shown that these aerogels present the fast sorption kinetics typical for aerogels (due to the high porosity and the large pore size) and a high sorption capacity characteristic (due to the sorption of the organic molecules in the host nanopores of the crystalline phase). These sorption properties as well as their good handling characteristics makes these new materials particularly suitable as a sorption medium to remove traces of pollutants from water and air.…”

Section: Introductionmentioning

confidence: 99%

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Monolithic aerogels with nanoporous crystalline phases

Daniel¹,

Guerra²

2015

AIP Conference Proceedings

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Abstract. High porosity monolithic aerogels with nanoporous crystalline phases can be obtained from syndiotactic polystyrene and poly(2,6-dimethyl-1,4-phenylene)oxide thermoreversible gels by removing the solvent with supercritical CO 2 . The presence of crystalline nanopores in the aerogels based on these polymers allows a high uptake associated with a high selectivity of volatile organic compounds from vapor phase or aqueous solutions even at very low activities. The sorption and the fast kinetics make these materials particularly suitable as sorption medium to remove traces of pollutants from water and moist air.

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Section: Introductionmentioning

confidence: 99%

Section: Structure and Morphology Of S-ps Aerogelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Monolithic aerogels with nanoporous crystalline phases

Daniel¹,

Guerra²

2015

AIP Conference Proceedings

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“…[35,36] The absorption rate of solvent molecules was enhanced by a porous aerogel with a mesh structure, which was prepared by treating the sPS gel in scCO2. [37][38][39] The relationship between the size of the solvent molecule and the cavity volume of e-sPS was reported by Tsujita et al [40][41][42][43] It was shown that the cavity volume of -sPS is reduced after extracting the solvent molecules.…”

Section: Introductionmentioning

confidence: 99%

Absorption Kinetics of Phenol into Different Size Nanopores Present in Syndiotactic Polystyrene and Poly (p-methylstyrene)

Furukawa¹,

Nakaoki²

2013

Polymer Science

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Inclusion Compounds Containing Polymers

Zhong

Gao

Guo

et al. 2016

Kirk-Othmer Encyclopedia of Chemical Technology

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Inclusion compounds formed between host and guest molecules via noncovalent interaction exhibit novel properties and functions compared to the constituting species. The focus in this encyclopedia article is on the inclusion compounds containing polymers, as either hosts or guests. Among the hosts, the small molecular hosts can be divided into two categories: the small molecular hosts with intramolecular cavity, such as cyclodextrins (CDs) and cucurbiturils (CBs); the others with intermolecular cavity, such as urea, thiourea, choleic acids, deoxycholic acids, perhydrotriphenylene, tris(o‐phenylenedioxy)cyclotriphosphazene, some small molecular drugs, etc. Depending on the size of the cavity and the intermolecular interactions, chains of polyolefins, polyethers, polyesters, conjugated polymers, and ionic polymers can be accommodated in the cavities to form inclusion compounds. Besides the small molecular host, there are also many inclusion compounds with polymer chains as hosts, among them amylose, poly( l ‐lactic acid), stereoregular polystyrene, linear d,l ‐peptides, oligophenylacetylenes, and poly(ethylene oxide) are reviewed. Finally, applications of inclusion compounds containing polymers in the fields of separation, stereocontrolled polymerization, sensors, drug and gene delivery, nucleating agents, gels, self healing materials, molecular rotor, and molecular wires, are introduced.

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Aerogels with a Microporous Crystalline Host Phase

Cited by 186 publications

References 35 publications

Monolithic aerogels with nanoporous crystalline phases

Monolithic aerogels with nanoporous crystalline phases

Absorption Kinetics of Phenol into Different Size Nanopores Present in Syndiotactic Polystyrene and Poly (p-methylstyrene)

Inclusion Compounds Containing Polymers

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