Tarek Salem ¹, M. Salama ¹, A. Atef El-Sayed ²

Affiliations
1 Textile Research Division, National Research Centre, El Bohouthst., 12622, Dokki, Giza, EG
2 Textile Research Division, National Research Centre, El Bohouthst., 12622, Dokki, Giza

Abstract

Objectives: Exceptional reaction conditions can be generated by ultrasonic irradiation via acoustic cavitation, which allows for the synthesis of new materials with unusual properties. Inspired by the importance of this efficient and environmentally friendly synthetic route, waterborne polyurethane copolymer with pendant carboxylate in the hard segment is prepared. In this current attempt, 2,2-bis(hydroxymethyl)-propionic acid was used to incorporate ionic groups into polyurethane polymer. Methods/Analysis: Factors affecting the sonochemical polymerization such acoustic power, type of solvent, using of catalyst, and monomers molar ratio were studied. The prepared waterborne polyurethanes were investigated by FTIR and GPC. Furthermore, in the construction of surfaces, the influence of the application of prepared waterborne polyurethane on the interaction of polyester fabrics with methylene blue as cationic dyes was assessed. For that purpose, color strength and fastness tests were carried out to prove the effectiveness of surface modification. Findings: The results indicated that the one-shot sonochemical polymerization by ultrasound at 100 W was more effective in N,Ndimethyl formamide (DMF) than thermally assisted polyurethane polymerization. Novelty/Improvement: The rate of sonochemical polymerization is much faster than thermal polymerization. Improvement in the printability of PET fabrics treated with the prepared polyurethanes.

Keywords

Isophorone diisocyanate, Polyurethane Copolymer, Sonochemical Polymerization, Surface Modification, Ultrasound

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A. Atef El-Sayed ¹, M. Salama ¹, T. Salem ¹, M. Rehan ¹

Affiliations
1 Textile Research Division, National Research Centre, El Bohouthst, 12622, Dokki, Giza, EG

Abstract

Objectives: In this paper, a novel attempt has been made to develop anionic waterborne polyurethane with antibacterial properties. Methods/Analysis: To achieve this goal, a one-pot synthesis was used to incorporate silver nanoparticles into the Waterborne Polyurethane (WPU) via a combination of reduction of silver ions and polymerization reactions. This silver/waterborne nanocomposite was applied as a modifier for preparing antimicrobial viscose fabric with enhanced coloration and fastness properties. Findings: A bacterial reduction of 100% is observed during the antibacterial activity tests of the nanocomposites for both Escherichia coli and Candida albicans. Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD) was used to confirm the formation of Ag nanoparticles in WPU. Scanning Electron Microscopy (SEM-EDX) and Fourier Transform Infrared Spectroscopy (FTIR) were used to verify the presence of silver/waterborne composites layers. Exploration of the fastness properties and the color strength (K/S) of colored viscose fabrics were also performed. Novelty/Improvement: The obtained results can be considered as a measure of the degree of the interaction between dyes such as cationic and reactive classes and different modified surfaces.

Keywords

Antibacterial, Coating, Nanocomposites, Silver Nanoparticles, Water Borne Polyurethane.

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