Results 201 to 210 of about 26,556 (257)

On the sulfonation of fluorinated aromatic polymers: Synthesis, characterization and effect of fluorinated side groups on sulfonation degree

, 2020
Series of partially sulfonated poly(F-STs-co-ST) copolymers and poly(TFMST-ter-ST-ter-FMST) terpolymer have been successfully synthesized via post-sulfonation method using acetyl sulfate as a sulfonating agent.
J. Wolska, Justyna Walkowiak-Kulikowska
semanticscholar   +1 more source

Low temperature sulfonation of acai stone biomass derived carbons as acid catalysts for esterification reactions

Energy Conversion and Management, 2019
Heterogeneous acid catalysts derived from acai stone ( Euterpe oleracea Mart. ), a large-scale residue biomass, were synthesized by partial carbonization followed by sulfonation within a short preparation time under controllable conditions.
Rayanne O. Araújo, J. Chaar, L. S. Queiroz, G. N. Filho, C. D. Costa, Graziela C.T. da Silva, R. Landers, M. J. Costa, A. Gonçalves, L. D. Souza   +9 more
semanticscholar   +1 more source

Impact of Hydration and Sulfonation on the Morphology and Ionic Conductivity of Sulfonated Poly(phenylene) Proton Exchange Membranes

Macromolecules, 2019
Multiple computational and experimental techniques are used to understand the nanoscale morphology and water/proton transport properties in a series of sulfonated Diels–Alder poly(phenylene) (SDAPP) membranes over a wide range of temperature, hydration ...
E. Sorte, Benjamin A. Paren, C. G. Rodriguez, Cy H. Fujimoto, Cassandria Poirier, L. Abbott, Nathaniel A. Lynd, K. Winey, A. Frischknecht, T. Alam   +9 more
semanticscholar   +1 more source

Sulfonation of dialdehyde cellulose extracted from sugarcane bagasse for synergistically enhanced water solubility.

Carbohydrate Polymers, 2019
Sulfonated cellulose (SC) was successfully derived from microcrystalline cellulose (MCC) extracted from sugarcane bagasse, which is a type of agricultural waste.
S. Thiangtham, J. Runt, H. Manuspiya
semanticscholar   +1 more source

Enhanced CO2 permeability of thermal crosslinking membrane via sulfonation/desulfonation of phenolphthalein-based cardo poly(arylene ether ketone)

, 2020
Thermal crosslinking membranes for gas separation have excellent plasticization resistance compared to polymeric membranes. Their low gas permeability, however, is not high enough for industrial application at low cost.
R. Xu, Lin Li, Mengjie Hou, Jiajia Xue, Liu Yuzhe, Zonglin Pan, Chengwen Song, Tonghua Wang   +7 more
semanticscholar   +1 more source

Sulfone-linked paracyclophanes

Chemical Communications, 1998
Oxidation of the macrocyclic thioether sulfones (SϕSO2ϕ)n (ϕ = 1,4-phenylene; n = 2 or 3) affords sulfone-linked paracyclophanes (ϕSO2)4 and (ϕSO2)6; single crystal X-ray analysis reveals the tetramer, (ϕSO2)4, to be a near-perfect square box, whilst the hexamer, (ϕSO2)6, adopts a much more irregular conformation; exhaustive oxidation of (SϕSO2ϕ)4 ...
I. BAXTER, H. M. COLQUHOUN, P. HODGE, KOHNKE, Franz Heinrich, D. J. WILLIAMS   +4 more
openaire   +2 more sources

Amphiphilic perfluoroalkylated sulfones and sulfonate betaines

Journal of Fluorine Chemistry, 2007
Abstract Two types of perfluoro alkyl-containing amphiphilic sulfones 7 – 9 and 13 – 15 , respectively, and sulfonate betaines 23 – 32 were prepared using 2-[(perfluoroalkyl)methyl]oxiranes ( 1–3 , R F  = C 4 F 9 , C 6 F 13 , C 8 F 17 ) or 3-(perfluoroalkyl)propyl iodides ( 16 and 17 , R F  = C 6 F 13 , C 8 F 17 ) as the starting compounds ...
Robert Kaplánek, Oldřich Paleta
openaire   +1 more source

Sulfonation of Phenolated Kraft Lignin to Produce Water Soluble Products

Journal of wood chemistry and technology, 2019
Kraft lignin is water insoluble and has limited end-use applications. To produce water soluble lignin-based products, the modification of softwood kraft lignin through phenolation followed by sulfonation of sulfuric acid or sodium sulfite treatment were ...
Weijue Gao, John P. W. Inwood, P. Fatehi
semanticscholar   +1 more source

Synthesis of nucleoside sulfonates and sulfones

Tetrahedron Letters, 1991
Abstract Sulfonate analogues of adenine, cytidine and guanine monophosphates have been synthesized for the first time. The synthesis of ribose 3-sulfonate, a synthesis of sulfonyl disaccharides and dinucleotides and an improved synthesis of a ribose 3-sulfone is also reported.
Branislav Musicki, Theodore S. Widlanski
openaire   +1 more source

Polybenzimidazole block sulfonated poly(arylene ether sulfone) ionomers

Chemical Communications, 2011
Novel ionomers based on polybenzimidazole block sulfonated poly(arylene ether sulfone) show excellent thermal properties. The ionic aggregation of sulfonic acid groups leads to well-developed phase separated morphology and thus high proton conductivity at wide humidity range, up to 65 mS cm(-1) at 90% relative humidity.
Feifei, Ng, Byungchan, Bae, Kenji, Miyatake, Masahiro, Watanabe   +3 more
openaire   +2 more sources