the capsule is a core-shell construction with single smooth exterior morphologies with few nano-particles or nanorod. This thin wall forms
when urea reacts with formaldehyde in the aqueous phase, resulting in the deposition of the low molecular weight UF polymer on
oil–water interface. It can be concluded that the best result of product when using NaCMC as single protective colloid is under the
concentration of 1.0 g/L.