Fig. 1
Dyeing process
Fig. 2
Influence of variations in dyeing process parameters on K/S value of dyed fabric.
Fig. 3
Chitosan molecular structure
Fig. 4
Scanning electron microscope photographs of dyed fabrics with different o.w.f concentrations of tea polyphenols
Fig. 5
Infrared spectroscopy curves of dyed fabrics with different o.w.f concentrations of tea polyphenols
Table 1.
Test results of various colorfastness indicators for tea polyphenol functional dyed and finished modified cotton fabrics
| Tea polyphenols o.w.f concentration/% | Sunlight fastness/grade | Washing fastness/grade | Rubbing fastness/grade | |
|---|---|---|---|---|
| Dry state | Wet state | |||
| 4 | 3~4 | 4 | 4 | 3~4 |
| 5 | 3~4 | 4~5 | 4~5 | 3~4 |
| 6 | 4 | 4~5 | 4~5 | 4~5 |
| 7 | 4 | 4 | 4 | 4 |
| 8 | 4~5 | 4 | 4 | 4 |
Tab. 2.
Test results of antibacterial and ultraviolet protection properties of tea polyphenol dyed and finished modified cotton fabrics
| Tea polyphenols o.w.f concentration/% | Antibacterial performance (%) | UV protection | Deodorization rate (%) | |||
|---|---|---|---|---|---|---|
| Escherichia coli | Staphylococcus aureus | UPF | T %(UVA) | T(UVB) % | ||
| 0 | 49.95 | 58.95 | 11.86 | 14.74 | 11.93 | —— |
| 4 | 53.62 | 63.44 | 20.38 | 10.92 | 9.37 | 85.68 |
| 5 | 58.91 | 67.53 | 29.72 | 6.67 | 5.82 | 86.13 |
| 6 | 78.49 | 72.68 | 38.27 | 3.14 | 1.59 | 86.52 |
| 7 | 80.21 | 73.32 | 41.73 | 3.02 | 1.36 | 87.07 |
| 8 | 81.16 | 75.65 | 43.81 | 2.86 | 1.24 | 87.21 |