After all the ESO solution was transferred into the PLA solution, the resultant mixture was then stirred for 1 h. The required modified clay (FNCs-MMT) was then added into the dissolved PLA/ESO in the small portion. The mixture was then refluxed for 1 h and then ultrasonically stirred using the Ultra Sonic Cathode for 10 min to make sure that the clay was fully dispersed in the PLA/ESO solution. The nanocomposite was then poured into a Petri dish and left to dry. The amount of PLA/ESO and the modified clay used in this study are listed in Table 2.