Oil solution

Ethanol

200 ml

Palmitic acid (PA)

10 g

Grape polyphenol (GP)

2.5 g

Surfactant (POEL)

1.0 g

HLB of POEL

6.3: POEL(1), 9.6: POEL(2), 11.3: POEL(3)

Spray drying

Feed velocity

0.6 m³/min

Spraying pressure

P = 0.5, 1.0, 1.5, 2.0 kgf/cm²

Inlet temperature

T_in = 80, 100, 120, 140˚C