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Surface roughness values (Ra) of PU/PLDL blend and PU/PLDL/ZnO composite obtained using AFM analysis.
| Sample code | Rq (nm) | |
|---|---|---|
| Top side | Bottom side | |
| PU/PLDL (control) | 409 ± 65 | 198 ± 78 |
| PU/PLDL 0.001 ZnO | 575 ± 97 | 248 ± 56 |
| PU/PLDL 0.01 ZnO | 613 ± 85 | 267 ± 23 |
| PU/PLDL 0.05 ZnO | 747 ± 109 | 319 ± 92 |
