Effect of Surfactant Formula on the Film Forming Capacity, Wettability, and Preservation Properties of Electrically Sprayed Sodium Alginate Coats

Abstract

Surfactants are always added to coating formulations to ensure good adhesion of edible coatings to a product’s surface and to maintain freshness. In this study, the effects of the mix surfactants Tween 20 and Span 80 with different hydrophile–lipophile balance (HLB) values on the film-forming ability, wettability, and preservation capacity of blueberry sodium alginate coating were investigated. The results indicated that Tween 20 obviously ensured favorable wettability and improved the uniformity and mechanical properties of the resulting film. While the addition of Span 80 reduced the mean particle size of the coating, enhanced the water resistance of the film, and helped to reduce blueberry weight loss. A sodium alginate coating with low viscosity and medium HLB could better inhibit the galactose, sucrose, and linoleic acid metabolism of blueberries, reduce the consumption of phenols, promote the accumulation of flavonoids, and thus display superior coating performance. In summary, sodium alginate coating with medium HLB had comprehensive advantages in film-forming ability and wettability and was conducive to the fresh-keeping role.

Effect of Chemical Degradation of Sodium Alginate on Capsaicin Encapsulation

“…The surface tension depended on the molecular weight and viscosity. The higher the molecular weight, the higher the surface tension [15]. .133 e ± 0.450 a-e values with different letters within the same column differ significantly (p < 0.05).…”

“…The surface tension depended on the molecular weight and viscosity. The higher the molecular weight, the higher the surface tension [15]. The value of the contact angle is a measure of the wettability of the surface.…”

Octacalcium Phosphate-Laden Hydrogels on 3D-Printed Titanium Biomaterials Improve Corrosion Resistance in Simulated Biological Media

“…Moreover, the presence of OCP particles in the form of agglomerates further increases the wettability of composite coatings. The space between the agglomerated OCP particles is larger than that of the smaller particles in the accumulation process because they cause a larger equivalent capillary radius, thus increasing the wetting rate [45].…”