Abstract
Abstract Technical hydrolysis lignins, both freshly obtained and stored longterm under atmosphere conditions, were treated by steam explosion (SE, 235°C/3.2 MPa) for 1, 2, and 3 min. The SE treated lignins were characterized by means of solid-state 13C nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopy. It was found that SE leads to significant changes in morphological and chemical properties of lignin due to oxidation, condensation and hydrolytic destruction.
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