Thiol-ene chemistry as an effective tool for hydrophobization of cotton fabrics

In this paper, several methods of hydrophobization of cotton fabrics using the thio-ene click reaction were compared. Durable, superhydrophobic textiles were obtained in an easy way. Various variants of functionalized silsesquioxanes were used for the hydrophobization of fabrics. The synthesis of bifunctional silsesquioxanes (RSiMe2O)(4)(ViSiMe(2)O)(4)Si8O12 and (RSiMe2O)(4)(R'SiMe2O)(4)Si8O12 were performed via hydrothiolation of silsesquioxane derivative (ViSiMe(2)O)(8)Si8O12. Alkoxysilyl, alkyl and fluoroalkyl moieties were introduced as functional groups. Samples were prepared using four methods, differing in the modification method and the number of stages. During the research, fabrics were modified via (a) the dip-coating process, (b) carrying out thiol-ene click reactions directly on the surface of the fabric and (c) using both of these methods. The hydrophobicity of the fabric was evaluated by measuring the Water contact angle (WCA). The obtained samples were also examined using infrared analysis (FT-IR), Scanning electron microscope (SEM), and Elemental analysis (SEM-EDS). All analyses were performed before and after the washing process in order to verify the stability of the performed modifications.

Automated summary

This paper compares different methods of hydrophobization of cotton fabrics using the thio-ene click reaction and demonstrates the easy production of durable, superhydrophobic textiles. Functionalized silsesquioxanes are used for the hydrophobization, with alkoxysilyl, alkyl, and fluoroalkyl moieties introduced as functional groups. Different methods and stages are employed to prepare samples, and the hydrophobicity of the fabric is evaluated using water contact angle measurements. The samples are also analyzed using infrared analysis, scanning electron microscopy, and elemental analysis.