29953-17-1Relevant academic research and scientific papers
Natural tannin-furanic thermosetting moulding plastics
Li, Xinjun,Nicollin, Arnaud,Pizzi, Antonio,Zhou, Xiaojian,Sauget, Alix,Delmotte, Luc
, p. 17732 - 17740 (2013)
A new 100% biosourced thermosetting plastic material, named condensed tannin-furanic thermoset is prepared and characterized in this paper. This new material is synthesized from tannin and furfuryl alcohol, both of which are inexpensive plant-derived chemicals. The co-polymerization process of these two chemicals was studied by 13C nuclear magnetic resonance (NMR) and matrix-assisted laser desorption-ionization time-of-flight (MALDI-ToF) mass spectroscopy. The 100% renewable bioresourced tannin-furanic thermosetting resin was found to have a glass transition temperature as high as 211 °C, and a 95% weight loss temperature of 244 °C and 240 °C in a nitrogen and in an air atmosphere, respectively. The char yield is as high as 52%. Moreover, this new thermoset material shows excellent mechanical properties: a Brinell hardness of 23 HBS, which is higher than commercial acrylic, polyvinyl chloride, and a little lower than that of solid polystyrene. The compressive break strength was found to be as high as 194.4 MPa, thus higher than that of filled phenolic resins, and much higher than that of solid polystyrene and of acetal resins. The Royal Society of Chemistry.
Chemical dynamics and reverse saturable absorption in di-furfuryl ether solutions
Mendon?a,Batista,De Souza,Zilio
, p. 499 - 506 (2001)
We report on the chemical dynamics and nonlinear optical absorption of di-furfuryl ether (DFE) solutions. DFE molecules were derivatized from the room temperature furfuryl alcohol self-reaction, whose reaction kinetics was investigated with the Z-scan technique and laser-induced fluorescence. These molecules are shown to exhibit a pronounced reverse saturable absorption process. The magnitude of the excited-state absorption cross-sections and the intersystem crossing lifetime have been evaluated with 8 ns pulses at 532 nm.
Comprehensive investigation of the biomass derived furfuryl alcohol oligomer formation over tungsten oxide catalysts
Chan, Xiaojun,Nan, Wei,Mahajan, Devinder,Kim, Taejin
, p. 11 - 15 (2015/09/21)
The feasibility of using tungsten oxide catalysts for furfuryl alcohol (FA) oligomerization reaction was investigated in the liquid phase at 100°C and ambient pressure. Five dimers (2,2′-difurylmethane, 2-(2-furylmethyl)-5-methylfuran, difurfuryl ether, 4-furfuryl-2-pentenoic acid γ-lactone, 5-fufuryl-furfuryl alcohol) and two trimers (2,5-difurfurylfuran and 2,2′-(furylmethylene)bis(5-methylfuran)) were observed in GC and GC/MS, while Infrared (IR) and Raman spectroscopy provided the co-existence of conjugated diene and diketone molecular structures, respectively. It was observed that C9-C15 oligomers' selectivity decreased as the reaction time increased. Ether bridge and terminal alcohol are dominant FA dimers which are very similar to sulfuric acid (homogeneous catalysis) catalyzed dehydration/condensation reaction of FA.
Gel permeation chromatography study of the kinetics of condensation of furfuryl alcohol in THF solution
Mokoena,Ddamba,Keikotlhaile
, p. 73 - 78 (2007/10/03)
The kinetics of the acid catalysed condensation of furfuryl alcohol in tetrahydrofuran medium have been investigated by means of gel permeation chromatography using a 100A ultrastyragel column and tetrahydrofuran as the mobile phase. The reaction has been found to be second order. Comparison of the kinetics of condensation of the monomer and the 5-furfuryl furfuryl alcohol dimer indicates higher rates of reaction for condensation of the dimer as a consequence of the greater stability of the tertiary and allylic carbocations formed during its condensation or the condensation of higher alcohol oligomers. The study of the side reaction which results in furan ring cleavage leading to the formation of laevulinic acid, whose proportion has been estimated by pH titration, was restricted to furfuryl alcohol condensation reactions.
