Fig. 2

Cellulose structural changes with various LHW pretreatment severities. a cellulose CrIs measured by solid-state NMR; b linear regression and correlation of cellulose CrIs with pretreatment severities; c cellulose degree of polymerization (DP) and polydispersity index (PDI); d chromatograms of cellulose molecular weight measured by GPC. r is correlation coefficient value