Coating of TPU-PDMS-TMS on Polycotton Fabrics for Versatile Protection

Abstract

This research aims to develop a non-fluorine based and durable coating technology that brings excellent hydrophobic, oleophobic and aqueous liquid repellent properties to polycotton fabrics (blend ratio 80/20 for cotton/polyester) while maintaining comfort to an acceptable level. A crosslinked network from thermoplastic polyurethane (TPU), polydimethylsiloxane (PDMS) and trimethylated silica (TMS) has been formed on the surface of polycotton fabrics by the conventional padding-knife coating-padding-curing technique. A series of characterizations have been conducted to understand the chemical components, morphology, versatile protection and comfort of the coated fabrics. The TPU-PDMS-TMS (TPT) coated fabrics showed a high hydrophobic surface with a high water contact angle of 142 • , and the coating was durable against different cycles of laundering and crocking. The coated fabrics also showed excellent repellency against oils, liquids and chemicals for a long period of time. The coating has affected the air permeability and water vapor permeability together with the moisture management property of the polycotton fabrics, and the thermal resistance of the polycotton fabric has been enhanced at the same time. The coating technology developed can be further applied in protective clothing and functional textiles in different areas including military, mining and outdoor protection gear.

Ag nanoparticles-based antimicrobial polycotton fabrics to prevent the transmission and spread of SARS-CoV-2

“…The superficial modification through the incorporation of nanoparticles has been extensively studied and shows potential for obtaining devices with microbicidal activity. [28][29][30][31][32][33] In this scenario, nanoparticles can advantageously replace micrometric particles used in the finishes to obtain functional fabrics, because it has a greater surface area, resulting in a better adhesion to fabrics and, consequently, greater durability of functionality. Furthermore, it is possible to achieve a pronounced effect with small amounts of material not altering the original properties of the fabric.…”

Study on creating the three-dimensional shape of apparel by thermal bonding of thermoplastic polyurethane film and vacuum forming molding

“…Moreover, the TPU film can be easily bonded under heat and it is widely used in the fabric coating phase. [28][29][30] In this experiment, the thickness of the TPU film is 0.2 mm and the density is 330 g/yard, and hundreds of TPU films and fabric samples were prepared. They were cut into sizes of 130 mm × 130 mm (the size is slightly bigger than that of the vacuum bed, which is 100 mm × 100 mm), 40 mm (wrap) × 15 mm, and 40 mm (weft) × 15 mm, respectively.…”

“…Three different bonding temperatures were determined to be applied, namely, 160°C, 170°C, and 180°C. [28][29][30][31][32] It is noted that these temperatures were selected based on the heat resistance of polyester, cotton, and heat fusion point of the TPU film. The heatpressing time was set to 30 s. [31][32][33][34][35] Each selected fabric sample was horizontally placed on the top of the TPU film ( Figure 4).…”

Hot-melt Adhesive Bonding of Polyurethane/Fluorinated Polyurethane/Alkylsilane-Functionalized Graphene Nanofibrous Fabrics with Enhanced Waterproofness, Breathability, and Mechanical Properties

“…Waterproof-breathable (WB) fabrics are materials that have waterproof, breathable, windproof, and warmth-generation properties [1][2][3]. They can be classified as high-density, coated, and laminated fabrics [4][5][6][7][8], according to the processing technology. Compared with high-density and coated fabrics, laminated fabrics can easily achieve improved waterproofness and breathability, synchronously.…”