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. 2019 Aug 16;7(8):267. doi: 10.3390/microorganisms7080267

Table 1.

Grammage, thickness, mechanical and optical properties of the films.

Properties Films p-Values
Polystyrene Petri Dishes Lotus Negative Template
Without EO a With EO b Without EO c With EO d
Grammage (g/m2) 107.30 ± 5.33 145.10 ± 18.64 128.55 ± 3.35 167.21 ± 1.41 0.088 ab
0.023 cd
0.020 ac
0.176 bd
Thickness (µm) 118.70 ± 10.70 119.33 ± 13.92 156.67 ± 29.66 166.67 ± 10.99 0.914 ab
0.460 cd
0.024 ac
< 0.001 bd
Tensile strength (MPa) 14.20 ± 2.08 9.60 ± 0.55 6.82 ± 0.57 5.31 ± 0.62 0.054 ab
0.063 cd
0.022 ac
0.001 bd
Elongation (%) 2.51 ± 0.36 2.44 ± 0.36 3.13 ± 0.22 2.21 ± 0.38 0.823 ab
0.032 cd
0.076 ac
0.489 bd
Elastic modulus (MPa) 927.12 ± 110.02 353.21 ± 20.21 172.49 ± 25.49 257.97 ± 31.80 0.111 ab
0.177 cd
0.079 ac
0.149 bd
Transparency (%) 94.89 ± 0.45 63.78 ± 2.56 82.38 ± 0.98 69.92 ± 1.56 0.050 ab
0.033 cd
0.037 ac
0.203 bd
L*
(lightness)
25.99 ± 0.47 62.35 ± 1.65 46.67 ± 1.41 56.85 ± 0.44 0.019ab
0.066 cd
0.027ac
0.167 bd
a*
(redness)
−1.43 ± 0.07 0.04 ± 0.39 0.39 ± 0.05 2.69 ± 1.01 0.158 ab
0.263 cd
0.003 ac
0.199 bd
b*
(yellowness)
10.74 ± 1.95 37.70 ± 1.51 26.49 ± 1.70 42.73 ± 2.31 0.010 ab
0.036 cd
0.027 ac
0.230 bd

(Results expressed as mean ± SD) a, b, c and d correspond to each type of film; Significant p-values are highlighted in bold.