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Field emission scanning electron microscopy (FESEM) images of the fracture surfaces of the green composites made of polylactide (PLA), poly(ε-caprolactone) (PCL), walnut shell flour (WSF), and maleinized linseed oil (MLO): (a) PLA; (b) PLA/PCL; (c) PLA/PCL/10WSF + MLO; (d) PLA/PCL/20WSF + MLO; (e) PLA/PCL/30WSF + MLO; (f) PLA/PCL/40WSF + MLO; (g) PLA/PCL/40WSF. Images were taken at 1000x and scale markers are of 10 µm.
