Table 3.
Percentage difference in flexural strength prior to and following treatment with ZnONPs.
| Sample | Flexural strength (MPa) | Increment (%) | Decrement (%) |
|---|---|---|---|
| 1 layer prior and upon treating with 1% ZnONPs | 56/59 | 5.1% | – |
| 1 layer prior and upon treating with 2% ZnONPs | 56/63 | 11.1% | – |
| 1 layer prior and upon treating with 3% ZnONPs | 56/53 | – | 5.7% |
| 1 layer prior and upon treating with 4% ZnONPs | 56/51 | – | 9.8% |
| 1 layer prior and upon treating with 5% ZnONPs | 56/49 | – | 14.2% |
| 2 layer prior and upon treating with 1% ZnONPs | 61/63 | 3.2% | – |
| 2 layer prior and upon treating with 2% ZnONPs | 61/67 | 8.9% | – |
| 2 layer prior and upon treating with 3% ZnONPs | 61/59 | – | 3.4% |
| 2 layer prior and upon treating with 4% ZnONPs | 61/55 | – | 10.9% |
| 2 layer prior and upon treating with 5% ZnONPs | 61/51 | – | 19.6% |
| 3 layer prior and upon treating with 1% ZnONPs | 66/69 | 4.4% | – |
| 3 layer prior and upon treating with 2% ZnONPs | 66/71 | 7.0% | – |
| 3 layer prior and upon treating with 3% ZnONPs | 66/63 | – | 4.8% |
| 3 layer prior and upon treating with 4% ZnONPs | 66/60 | – | 10.0% |
| 3 layer prior and upon treating with 5% ZnONPs | 66/56 | – | 17.0% |
| 4 layer prior and upon treating with 1% ZnONPs | 73/77 | 5.2% | – |
| 4 layer prior and upon treating with 2% ZnONPs | 73/80 | 8.8% | – |
| 4 layer prior and upon treating with 3% ZnONPs | 73/70 | – | 4.3% |
| 4 layer prior and upon treating with 4% ZnONPs | 73/67 | – | 8.9% |
| 4 layer prior and upon treating with 5% ZnONPs | 73/63 | – | 15.9% |