Synthesis, characterization and application of reactive UV absorbers for enhancing UV protective properties of cotton fabric | ||||
| Egyptian Journal of Chemistry | ||||
| Article 15, Volume 63, Issue 2, February 2020, Page 525-536 PDF (1.55 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2020.22140.2324 | ||||
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| Authors | ||||
Hekmat I. Ibrahim   1; Reham Farouk1; Elham A. El-karadly1; Ahmed H. M. Elwahy2; Abdalla. A. Mousa1
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| 1Dyeing, Printing & Auxiliaries Department, Textile Research Division, National Research Centre, Giza, Egypt | ||||
| 2Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt | ||||
| Abstract | ||||
| Two colourless reactive UV absorbers 1 and 2 were synthesized by the condensation reaction of both 2,4,6-trichlorotriazine and sulfanilinic acid with 4-aminobenzophenone and ethyl 4-aminobenzoate, respectively. The structures of UV absorbers 1 and 2 were confirmed by IR, NMR (1H and 13C), and elemental analysis. The synthesized reactive UV absorbers were applied to cotton fabric using pad-dry method in comparison with both exhaustion and microwave methods. The results showed that excellent ultraviolet protection factor (UPF) values were achieved on sodium hydroxide-treated cotton fabric using pad-dry method. The optimal conditions using pad-dry method, such as drying temperature, drying time and UV absorber concentration were discussed. It was found that the highest values of UPF and whiteness using reactive UV absorbers 1 and 2 especially after washing can be obtained in the conditions of 80 ºC drying temperature, 3 hours drying time and 15 g/l UV absorber concentration. The new reactive UV absorber 1 achieved excellent UPF value (58.2) compared to UV absorber 2 which exhibited poor UPF value (10.5) at the same conditions. | ||||
| Keywords | ||||
| Reactive UV absorbers; UPF; Whiteness; Pad-dry method; Sodium hydroxide-treated cotton fabric | ||||
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