SEM morphology, porosity, swelling and hardness test of foam from dried albumin -gambier tannins

Abstract

Phenolic foam is a product of natural albumin made from gambier tannins, water, and other additional substances. The interaction of albumin and tannin polyphenols can be considered as complex formation because of the secondary bonds that exist between them. Albumin-based foam is produced by a high-speed mixing system, therefore obtaining a homogeneous emulsion of gas dispersion in the oven-dried liquid. The aim of this study was to examine the morphological structure, porosity, swelling, and hardness of a foam made from several concentrations of dried albumin mixed with gambier tannins. The results showed that there werelarge, small, regular and cracked pore structures, with an average porosity of 73.16%, swelling of 45.55% and hardness of 22.09 (N/cm2) depending on albumin concentration used.