Table 2.
Results of orthogonal experiment design.
| No. | HS | Co-HS | Y1 | Y2 | Y3 | Overall score |
|---|---|---|---|---|---|---|
| 1 | RH40 | Glycerol | 5 | 60 | 5 | 27 |
| 2 | RH40 | Lecithin | 4 | 68 | 5 | 29.9 |
| 3 | RH40 | Propylene glycol | 4 | 40 | 1 | 17.5 |
| 4 | RH40 | / | 5 | 50 | 5 | 23 |
| 5 | EL30 | Glycerol | 5 | 45 | 5 | 21 |
| 6 | EL30 | Lecithin | 4 | 54 | 5 | 24.3 |
| 7 | EL30 | Propylene glycol | 3 | 30 | 1 | 13.2 |
| 8 | EL30 | / | 4 | 28 | 5 | 13.9 |
| 9 | RH40/Span80 | Glycerol | 4 | 53 | 5 | 23.9 |
| 10 | RH40/Span80 | Lecithin | 4 | 55 | 5 | 24.7 |
| 11 | RH40/Span80 | Propylene glycol | 4 | 35 | 1 | 15.5 |
| 12 | RH40/Span80 | / | 4 | 38 | 3 | 17.3 |
| 13 | EL30/Span80 | Glycerol | 4 | 27 | 3 | 12.9 |
| 14 | EL30/Span80 | Lecithin | 4 | 30 | 3 | 14.1 |
| 15 | EL30/Span80 | Propylene glycol | 2 | 15 | 1 | 6.9 |
| 16 | EL30/Span80 | / | 2 | 13 | 3 | 6.7 |