Agriculture Reference
In-Depth Information
The mechanism of encapsulation of the urea is described in Figure 31. The NR-g-St has a
core-shell structure with a hydrophobic NR as the core and the hydrophilic grafted St as a
shell. The hydrophobic NR core formed a wall-like barrier inside, while the hydrophilic
starch part and the urea particles were encapsulated inside the matrix (Figure 30).
The mechanism of encapsulation of the urea is described in Figure 31. The NR-g-St has a
core-shell structure with a hydrophobic NR as the core and the hydrophilic grafted St as a
shell. The hydrophobic NR core formed a wall-like barrier inside, while the hydrophilic
starch part and the urea particles were encapsulated inside the matrix (Figure 30).
Figure 28. Photo images of the capsules coated with different polymers NR, NR/St blend, NR-g-St and
St.
Figure 29. Swelling ratio (%) of the 5:5 PVA/St blend in water with different NR contents.
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