Amphiphilic hyaluronan was prepared by linking alpha linolenic acid (ALA).
Thermostability of linolenyl-grafted-HA was influenced by the way of drying.
Spray drying had produced homogeneous, pure and low residual solvent HA derivatives.
Wrong storage may change the beneficial effect of linolenic acid grafted to HA.
The use of amphiphilic HA for encapsulation was demonstrated.