Table 2. Optical Properties of the Electrospun Biopapers of Commercial and Cheese Whey (CW)-Derived Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) with 3-Hydroxyvalerate (3HV) Contents of 20 mol % (PHBVCW20), 40 mol % (PHBVCW40), and 60 mol % (PHBVCW60)b.
| biopaper | a* | b* | L* | ΔE* | T |
|---|---|---|---|---|---|
| commercial PHBV2a | 0.35 ± 0.03a | 1.29 ± 0.01a | 89.14 ± 0.02a | 9.20 ± 0.08a | |
| PHBVCW20 | –2.31 ± 0.04b | 10.46 ± 0.02b | 88.19 ± 0.05b | 9.60 ± 0.03a | 1.80 ± 0.03b |
| PHBVCW40 | –0.85 ± 0.01c | 5.80 ± 0.02c | 88.43 ± 0.04c | 4.72 ± 0.02b | 4.84 ± 0.02c |
| PHBVCW60 | –0.47 ± 0.02d | 5.99 ± 0.02d | 87.80 ± 0.03d | 4.96 ± 0.02c | 4.89 ± 0.03c |
Data reported in a previous study.22
Different letters (a–d) in the same column indicate a significant difference among the samples (p < 0.05). a*: red/green coordinates (+a red, −a green); b*: yellow/blue coordinates (+b yellow, −b blue); L*: luminosity (+L luminous, −L dark); ΔE*: color differences; T: transparency.