Table 2. Thickness, tensile properties, and water vapor permeability of the neat PBAT film, PBAT composite film, and commercial potato packaging films (HDPE and LDPE)

Films1)	Thickness (μm)	Tensil strength (MPa)	Elongation at break (%)	Elastic modulus (GPa)	Water vapor permeability (×10−10 g ․ m/m2 ․ Pa ․ s)4)
HDPE	10.7±0.762)c3)	54.37±0.97a	75.00±1.21c	1.43±0.07a	1.11±0.08c
LDPE	53.93±1.21ab	11.11±0.75b	478.76±40.20a	0.34±0.08b	5.57±0.13ab
Neat PBAT	53.13±1.22b	12.14±0.30b	375.29±2.91b	0.09±0.01c	5.49±0.13b
PBAT/CuONPs	56.40±2.43a	10.86±1.01b	340.88±4.88b	0.08±0.00c	5.83±0.25a

HDPE, high-density polyethylene film; LDPE, low-density polyethylene film; Neat PBAT, neat poly(butylene adipate-co-terephthalate) film; PBAT/CuONPs, poly(butylene adipate-co-terephthalate) composite film with 0.08 g copper oxide nanoparticles.
All values are mean±SD (n=3).
Values with different superscript letters (^a-c) in the same column are significantly different at p<0.05 by Duncan’s multiple range test.