PLA (Bio-flexF 6510)was obtained from Fkur kunststoff
GmbH (Siemensring 79, Germany) with a density of
1300 kg/m3, melting point of 150–170 C and molecular
weight of 197,000 g/mol. PLA resins were dried in a vacuum
oven at 60 C for 24 h before use. CNF gel (3 wt%) was
supplied by Nano Novin Polymer Co. (Sari, Iran). All other
reagents and solvents were of analytical grade and were
used without further purification.