representative of a (bulk) protein matrix that is not altered upon
the addition of the clay, then the failure of that component to
become modified by a reduction in the water content of the films
is an unexpected finding.
Hedenqvist et al. [69] reported that the Tg of nanocomposite films
composed of whey protein and MMT rose by 5–10 1C after the
addition of the latter to the formulation. Likewise, Rimdusit et al.
[70] observed that the Tg of carboxymethylcellulaose–MMT nanocomposites
increased from 176 to 182 1C upon augmenting the
content of clay and attributed this rise to a restriction in the thermal
movements of the methylcellulose because of the presence of the
nanoclay. Similar increments in the Tg of bionanocomposites as
measured by DSC can be cited in the literature