Fig. HSQC Spectrum of Aromatic Region for dynamic dried lignin reference sample 1-1
Fig. HSQC Spectrum of Aliphatic Region for dynamic dried lignin reference sample 1-1
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Aromatic Region:
The G2, G5, and H3,5 peaks retain most of their intensity, suggesting milder degradation of guaiacyl units compared to higher-temperature drying processes. This indicates that lower temperatures in dynamic drying preserve more of the aromatic structure.
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Aliphatic Region:
Methoxy (OMe) groups and β-O-4 peaks show moderate intensity reduction. The milder conditions appear to minimize ether bond cleavage and aliphatic side chain degradation compared to higher-temperature dynamic drying.