Modification of polyurethane‐coated fabrics by sol–gel thin films

Abstract

Sol-gel derived silica and hybrid films from tetraethoxysilane (TEOS) and 3-glycidyloxypropyltrimethoxysilane (GLYMO) were deposited by dip-coating, in order to find the best treatment. GLYMO-based treatments preserved textile feel of the material. The coatings were characterized by infrared spectroscopy (IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and water contact angle measurement. IR spectra confirmed the existence of silicate network and successfully conducted modification for both precursors. DSC and TGA showed that the conditions of hydrolysis had greater influence on TEOS than GLYMO-based treatments. Both treatments shifted the degradation onset to higher temperatures. SEM images showed that polyurethane surface and pores were completely covered and filled by silica or hybrid thin films forming a composite organic-inorganic coating. Hydrophobic effect was preserved for all the samples, except for a single treatment of the GLYMO, due to its polar epoxy group.

Flame Retardant and Antibacterial Coating on Cotton Fabric by Layer-by-Layer Assembly With Huntite-Hydromagnesite, Ammonium Polyphosphate, Chitosan and Aptes

“…Meanwhile a peak at 1532 cm -1 contributed by bending vibration of -NH2 groups from APTES and chitosan appeared in LBL treated fabrics. The peak at 1232 cm -1 ascribed to stretching vibration of P-Oaryl proved the presence of phosphate on AP code samples, which overlapped Si-C band at 1200 cm -1 for all LBL treated fabric samples [6,25,55]. It was determined that a peak at 1040 cm -1 ascribed to stretching vibration of P-O-C from AP15DE overlapped with peak at 1052 cm -1 ascribed to stretching vibration of C-O-C from cellulose, which was supported by Pan et al 2015 [30].…”

Modifications of Textile Materials with Functional Silanes, Liquid Silicone Softeners, and Silicone Rubbers—A Review

“…The thermal stability was improved, and the textile feel of the PU fabrics was saved by GLYMO-based treatments. Scanning electron microscopy (SEM) images revealed that the PU surface and pores were completely modified with thin hybrid silica films, which were preserved for most of the samples [ 128 ].…”

Preparation of the modified limestone possessing higher permeability of gas well based on fluorinated silica: Effect of catalyst

“…Among polymerization methods, ''sol-gel'' process is found to be an effective and substantial technique to form coating films with various geometrical structures and modify the properties of substrates [17,18]. Sol-gel processes consist of two mechanisms including hydrolysis and condensation.…”