Research Article

Film Properties, Water Retention, and Growth Promotion of Derivative Carboxymethyl Cellulose Materials from Cotton Straw

Figure 4

SEM surface film morphology of CMC-Na (a), CMC-K (b), and CMC-NH4 (c).
(a) SEM film images of CMC-Na in different spraying amounts (×110, ×800)
(b) SEM film images of CMC-K with different spraying amounts (×110, ×800)
(c) SEM film images of CMC-NH4 in different spraying amounts (×110, ×800)