The experiments of starch-based foam preparation
were set to study for the effects of OPF content, PVA
content, and glycerol content on mechanical properties
and water absorption of the foams. The controlled ranges
selected for each component were 0-15% for OPF, 0-
7.5% for PVA, and 0-5% for glycerol. Unmodified
cassava starch and OPF were first mixed in the dry state
using a Kitchen Aid mixer (SHARP, EMS-51). PVA
glycerol, and deionized water (DI) were then added to
the mixture and mixed until the mixture was
homogeneous, as shown in Fig. 2A. The formulation was
varied with 100 g total weight of the mixture as
summarized in Table 1.