Table 2.
Moisture content moisture content in PLA and coated samples at 80% RH, from measurements (MC) and from calculations (EMC), with the thickness and mass in percentage of PLA and the coatings.
| Thickness | Mass (%) | Moisture content (gwater/100 g dry matter) | ||||
|---|---|---|---|---|---|---|
| Sample | PLA (µm) | CS/NC layer (nm) | PLA | CS/NC layer | Expected MC (sample) | MC (sample) |
| PLA (1) | 50 ± 2 | – | 100 | – | – | 0.673 |
| PLA (2) | 50 ± 2 | – | 100 | – | – | 0.620 |
| PLA(CS) | 50 ± 2 | 40 | 99.98 | 0.02 | 0.691 | 0.759 |
| PLA(CS)(CNC)2 | 50 ± 2 | 120 | 99.76 | 0.24 | 0.712 | 0.732 |
| PLA(CS)(CNC)10 | 50 ± 2 | 440 | 99.13 | 0.87 | 0.797 | 0.759 |
| PLA(CS)(CNF)2 | 50 ± 2 | 44 | 99.91 | 0.09 | 0.692 | 0.744 |
| PLA(CS)(CNF)10 | 50 ± 2 | 60 | 99.88 | 0.12 | 0.697 | 0.763 |
| PLA(CS)(CNF TEMPO)2 (1) | 50 ± 2 | 48 | 99.90 | 0.10 | 0.695 | 0.747 |
| PLA(CS)(CNF TEMPO)2 (2) | 50 ± 2 | 48 | 99.90 | 0.10 | 0.695 | 0.771 |
| PLA(CS)(CNF TEMPO)10 (1) | 50 ± 2 | 80 | 99.84 | 0.16 | 0.710 | 0.697 |
| PLA(CS)(CNF TEMPO)10 (2) | 50 ± 2 | 80 | 99.84 | 0.16 | 0.710 | 0.716 |
Experimental variability: 10%
EMC(sample) : Expected equilibrium moisture content in the sample, MC(sample): Moisture content in the sample.