Accessibility of the functional groups of chitosan aerogel probed by FT-IR-monitored deuteration.
Transmission FT-IR spectroscopy allowed us to monitor the deuteration of wafers of chitosan aerogel and xerogel by D2O vapor at room temperature. The complete deuteration of the alcohol and amine groups of the aerogel (surface area 175 m2 g(-1) as measured by N2 volumetry) confirmed the high accessibility of the functional groups of the polymer. The xerogel (surface area 5 m2 g(-1)) was only partially deuterated in more severe conditions. The isotopic shift of the deuterated groups allowed us to confirm or revise some attributions of infrared bands of chitosan.
Valentin
Romain
R
Dipartimento di Scienza dei Materiali e Ingegneria Chimica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.
Bonelli
Barbara
B
Garrone
Edoardo
E
Di Renzo
Francesco
F
Quignard
Françoise
F
D048271:Chitosan / Q000737:chemistry*; D003903:Deuterium; D005782:Gels / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D009584:Nitrogen / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared
D005782:Gels; D048271:Chitosan; D003903:Deuterium; D009584:Nitrogen