title: Cyclodextrin-Based Solid-Gas Clathrates.
abstract: "Cyclodextrin-gas" clathrates were obtained by crystallization from water solution of α-, β-, and γ-cyclodextrins (CDs) under pressure of the gas to be entrapped into the CD molecules. When the pressure is released, these clathrates are stable at ambient conditions and dissociate at elevated temperature, which makes them interesting for various applications as foam boosters in food and other industries. It was found that under these conditions α-CD forms clathrates with all of the gases used in this study (N2, N2O, CO2, Ar), whereas β- and γ-CDs can form clathrates only with N2. The concentration of the cyclodextrin and the temperature and pressure of the gas were varied for achieving higher clathrate yield and larger amount of embedded gas. Highest values of about 2 wt % were found for α-CD-N2O, as it releases in the temperature range of 40-60 °C.
authors.affiliation: †Faculty of Chemistry and Pharmacy, University of Sofia "St. Kl. Ohridski", 1164 Sofia, Bulgaria.
authors.forename: Stiliana
authors.initials: S
authors.lastname: Pereva
authors.affiliation: †Faculty of Chemistry and Pharmacy, University of Sofia "St. Kl. Ohridski", 1164 Sofia, Bulgaria.
authors.forename: Tsveta
authors.initials: T
authors.lastname: Himitliiska
authors.affiliation: †Faculty of Chemistry and Pharmacy, University of Sofia "St. Kl. Ohridski", 1164 Sofia, Bulgaria.
authors.forename: Tony
authors.initials: T
authors.lastname: Spassov
authors.affiliation: §Unilever Research and Development, 3133 AT Vlaardingen, The Netherlands.|#Laboratory of Physical Chemistry and Colloid Science, Wageningen University, 6703 HB Wageningen, The Netherlands.|⊥Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
authors.forename: Simeon D
authors.initials: SD
authors.lastname: Stoyanov
authors.affiliation: §Unilever Research and Development, 3133 AT Vlaardingen, The Netherlands.
authors.forename: Luben N
authors.initials: LN
authors.lastname: Arnaudov
authors.affiliation: †Faculty of Chemistry and Pharmacy, University of Sofia "St. Kl. Ohridski", 1164 Sofia, Bulgaria.
authors.forename: Todor
authors.initials: T
authors.lastname: Dudev
mesh_terms: D001128:Argon / Q000737:chemistry; D002245:Carbon Dioxide / Q000737:chemistry; D003460:Crystallization; D003505:Cyclodextrins / Q000737:chemistry*; D004355:Drug Stability; D005740:Gases / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry; D009609:Nitrous Oxide / Q000737:chemistry; D011312:Pressure; D013696:Temperature; D047391:alpha-Cyclodextrins / Q000737:chemistry; D047392:beta-Cyclodextrins / Q000737:chemistry; D047408:gamma-Cyclodextrins / Q000737:chemistry
chemical_list: D003505:Cyclodextrins; D005740:Gases; D047391:alpha-Cyclodextrins; D047392:beta-Cyclodextrins; D047408:gamma-Cyclodextrins; D002245:Carbon Dioxide; D001128:Argon; C031215:betadex; D009609:Nitrous Oxide; C023792:gamma-cyclodextrin; D009584:Nitrogen; C032613:alpha-cyclodextrin
keywords: clathrates; crystallization; cyclodextrins; kinetics