ACCESSIBILITY OF HYDROGEN BONDS IN CELLULOSE

Cellulose solvent-based biomass pretreatment breaks highly ordered hydrogen bonds in cellulose fibers of switchgrass.

The switchgrass (SG) samples pretreated by cellulose solvent- and organic solvent-based lignocellulose fractionation were characterized by enzymatic hydrolysis, substrate accessibility assay, scanning electron microscopy, X-ray diffraction (XRD), cross polarization/magic angle spinning (CP/MAS) (13)C nuclear magnetic resonance (NMR), and Fourier transform infrared spectroscopy (FTIR). Glucan di...

Hydrogen Bonds

The Subtleties of Dissolution and Regeneration of Cellulose: Breaking and Making Hydrogen Bonds

Contact information: a: Division of Physical Chemistry, Department of Chemistry, Center for Chemistry and Chemical Engineering, Lund University, SE-221 00 Lund, Sweden; b: Materials Science and Engineering, Nanyang Technological University, Singapore 639798, c: FSCN, Fibre Science and Communication Network, Mid-Sweden University, Sundsvall, Sweden; E-mail: [email protected] d: Faculty o...

Influence of hydrogen bonds on glass transition and dielectric relaxations of cellulose

The molecular dynamic in hydrated cellulose has been investigated by a combination of thermal analyses and dielectric spectroscopy. Differential Scanning Calorimetry (DSC) shows the dependence upon hydration of the glass transition temperature Tg. A physical ageing phenomenon has been observed. At the molecular scale, bound water is hydrogen bonded to polar sites of cellulose macromolecules. At...

Study on hydrogen bonds of carboxymethyl cellulose sodium film with two-dimensional correlation infrared spectroscopy

Carboxymethyl cellulose is widely used in many industrial aspects and also in laboratory due to its good biocompatibility. However, special researches on infrared especially aiming at the hydrogen bonds structure of carboxymethyl cellulose were relatively poor. We demonstrate here a full view of infrared spectroscopy in the temperature range of 40–220 C, mainly aiming at the hydrogen bonds in t...