Introduction
Experimental
Materials
Synthesis of pigment microparticles
Synthesis of pigment nanoparticles
Fabrication of luminescent fabrics by screen-printing (SP)
Preparation of photoluminescent fabrics by spray-coating (SC)
Characterization methods
Photoluminescence screening
Reversibility of coated cotton
Colorimetric measurements
Morphological properties
Comfort screening
Hydrophobicity study
UV-protection evaluation
Flammability tests
Biological activity
Results and discussion
Morphological properties
Fabric | C | O | Si | P | Al | Sr | Eu | Dy | |
---|---|---|---|---|---|---|---|---|---|
SP1 | A1 | 50.77 | 25.02 | 15.27 | 7.10 | 1.06 | 0.44 | 0.27 | 0.13 |
A2 | 50.51 | 26.00 | 15.42 | 6.36 | 0.97 | 0.43 | 0.21 | 0.08 | |
A3 | 50.53 | 25.04 | 15.50 | 7.21 | 0.88 | 0.42 | 0.23 | 0.09 | |
SP4 | A1 | 46.09 | 33.70 | 6.91 | 2.42 | 5.53 | 3.42 | 0.90 | 0.57 |
A2 | 46.61 | 34.20 | 6.04 | 2.79 | 5.32 | 3.67 | 0.83 | 0.55 | |
A3 | 47.13 | 33.04 | 6.38 | 3.37 | 5.49 | 3.25 | 0.81 | 0.53 | |
SC1 | A1 | 64.40 | 26.80 | – | 6.25 | 1.44 | 0.63 | 0.29 | 0.19 |
A2 | 65.10 | 26.63 | – | 6.04 | 1.24 | 0.60 | 0.25 | 0.14 | |
A3 | 64.81 | 26.86 | – | 6.00 | 1.34 | 0.62 | 0.20 | 0.17 | |
SC4 | A1 | 52.15 | 33.20 | – | 3.73 | 5.98 | 3.85 | 0.64 | 0.45 |
A2 | 52.70 | 33.03 | – | 3.94 | 5.69 | 3.57 | 0.65 | 0.41 | |
A3 | 52.60 | 33.04 | – | 3.66 | 5.56 | 4.03 | 0.63 | 0.47 |
Element | SP1 | SC1 | SP4 | SC4 |
---|---|---|---|---|
Al | 65.04 | 48.41 | 65.35 | 54.17 |
Sr | 34.96 | 22.23 | 33.02 | 26.06 |
Si | – | 28.36 | – | 17.32 |
Eu | 0 | 0 | 1.14 | 1.66 |
Dy | 0 | 0 | 0.49 | 0.78 |
Colorimetric results
Cotton | L* | a* | b* | K/S | ||||
---|---|---|---|---|---|---|---|---|
DTL | UVL | DTL | UVL | DTL | UVL | DTL | UVL | |
SP1 | 92.83 | 89.02 | − 1.45 | − 12.09 | 1.32 | 6.24 | 1.18 | 2.85 |
SP2 | 91.64 | 87.44 | − 1.39 | − 12.74 | 1.43 | 6.20 | 1.26 | 3.04 |
SP3 | 90.04 | 86.01 | − 1.33 | − 14.11 | 1.47 | 5.95 | 1.40 | 3.42 |
SP4 | 88.72 | 84.29 | − 1.25 | − 18.23 | 1.51 | 5.24 | 1.47 | 4.06 |
SC1 | 94.55 | 90.33 | − 1.74 | − 14.68 | 1.21 | 7.60 | 0.70 | 3.31 |
SC2 | 94.17 | 88.02 | − 1.69 | − 17.09 | 1.27 | 6.40 | 0.81 | 4.72 |
SC3 | 93.72 | 85.65 | − 1.62 | − 20.84 | 1.29 | 5.31 | 0.85 | 6.30 |
SC4 | 93.25 | 83.29 | − 1.53 | − 22.38 | 1.32 | 4.30 | 0.88 | 7.24 |
Photoluminescence analysis
Hydrophobicity screening
Cotton | CA (°) | UPF | BL (cm) | AP (cm3/cm2.s1) | |
---|---|---|---|---|---|
warp | weft | ||||
Blank | – | – | 2.30 | 2.57 | 52.73 |
SP1 | 109.0 | 65 | 2.71 | 2.93 | 51.62 |
SP2 | 115.5 | 93 | 3.06 | 3.20 | 50.80 |
SP3 | 119.3 | 134 | 3.35 | 3.58 | 50.23 |
SP4 | 120.4 | 152 | 3.62 | 3.96 | 49.86 |
SC1 | 137.5 | 98 | 2.50 | 2.72 | 51.84 |
SC2 | 139.0 | 141 | 2.67 | 2.91 | 51.45 |
SC3 | 143.1 | 177 | 2.88 | 2.95 | 51.07 |
SC4 | 144.7 | 203 | 2.95 | 3.02 | 50.89 |
UV-protection and comfort screening
Cotton | Crocking | Washing | Perspiration | Light | |||||
---|---|---|---|---|---|---|---|---|---|
Dry | Wet | Alt | St | Acid | Base | ||||
Alt | St | Alt | St | ||||||
SP1 | 4 | 3–4 | 4 | 4 | 4–5 | 4–5 | 3–4 | 4 | 6 |
SP2 | 4 | 3–4 | 4 | 4 | 4–5 | 4–5 | 4 | 4 | 6 |
SP3 | 4 | 4 | 4 | 4 | 4–5 | 4–5 | 4 | 4 | 6 |
SP4 | 4 | 4 | 4 | 4 | 4 | 4 | 3–4 | 3–4 | 6 |
SC1 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 6–7 |
SC2 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 6–7 |
SC3 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 4–5 | 6–7 |
SC4 | 4–5 | 4–5 | 4 | 4 | 4–5 | 4–5 | 4 | 4 | 6 |
Flame-retardant screening
Cotton | C.L. (mm) | C.W. (mm) | LOI (%) |
---|---|---|---|
Blank | Burnt completely | 17 | |
SP1 | 47 | 18 | 39 |
SP2 | 45 | 18 | 40 |
SP3 | 43 | 18 | 42 |
SP4 | 42 | 17 | 42 |
SC1 | 43 | 17 | 51 |
SC2 | 40 | 17 | 52 |
SC3 | 38 | 17 | 54 |
SC4 | 37 | 17 | 55 |
Biological properties
Number of washes | Bacterial species | Bacteria reduction (%) | |||
---|---|---|---|---|---|
SP1 | SP4 | SC1 | SC4 | ||
0 | S.a | 32 ± 1.0 | 37 ± 1.2 | 43 ± 1.1 | 48 ± 1.4 |
S.t | 39 ± 1.2 | 42 ± 1.0 | 46 ± 1.2 | 57 ± 1.2 | |
5 | S.a | 24 ± 1.5 | 27 ± 1.4 | 31 ± 1.1 | 39 ± 1.3 |
S.t | 25 ± 1.1 | 28 ± 1.2 | 33 ± 1.1 | 45 ± 1.3 | |
10 | S.a | 13 ± 1.5 | 15 ± 1.9 | 22 ± 1.6 | 27 ± 1.0 |
S.t | 17 ± 1.7 | 20 ± 1.6 | 24 ± 1.8 | 35 ± 1.5 | |
15 | S.a | 11 ± 1.6 | 13 ± 1.3 | 18 ± 1.4 | 21 ± 1.1 |
S.t | 15 ± 1.0 | 18 ± 1.3 | 20 ± 1.0 | 24 ± 1.0 |
Toxicity (%) | IC-90 (µg/mL) | IC-50 (µg/mL) | Cotton |
---|---|---|---|
SP4 | – | – | 1.3 |
SC4 | – | – | 1.0 |
DMSO | – | – | 1 |
Control (−ve) | – | – | 0 |