3.5. Solubility
Table 3 shows the solubility of EHCs synthesized with
different reaction conditions determined on the basis of
orthogonal tests. The results show that all derivates with
Mn = 1.9 · 105 can dissolve in H2O except NO.1 condition,
especiallly the solubility of NO.5 reached 63.5 mg/ml. It
suggested that EHCs is a good water-soluble chitosan derivate,
EHCs decreased the intermolecular interactions, such
as van der Waals forces, and then increased water solubility