Homogeneous Esterification of Cellulose in the Mixture N-Butylpyridinium Chloride/Dimethylsulfoxide

Figure 4

SEM micrographs of microcrystalline cellulose (a), regenerated microcrystalline cellulose (b), grafted microcrystalline cellulose (c), kraft cellulose (d), regenerated kraft cellulose (e), and grafted kraft cellulose (f).

(a)

(b)

(c)

(d)

(e)

(f)