Polyimide‐coated fabrics with multifunctional properties: Flame retardant, UV protective, and water proof

Abstract

Multifunctional technical textiles are of great interest both by industry and academia and these products are considered as high value-added products that contribute to the economies of countries. In this study, polyamic acid (PAA) was synthesized through polycondensation of pyromellitic dianhydride (PMDA) and 4,4 0 -oxydianiline (ODA) in dimethyl acetamide (DMAc) at low temperature. Then, PAA was coated onto woven cotton and polyester fabric by padding technique. Finally, polyimide (PI)-coated multifunctional cotton and polyester fabrics were obtained by an easy coating technique and low-temperature imidization. Thus, low cost, easily accessible and widely used cotton and polyester fabrics were converted to high-performance textile products, which are flame retardant, UV protective, acid resistant, and waterproof. The chemical, thermal, morphological, optical, mechanical, wettability, chemical resistance, and flame retardancy properties of developed fabrics were investigated. Optical results showed that both PI-coated cotton and polyester fabrics are UV-A protective compared to noncoated fabrics. Moreover, PI-coated samples have high contact angles which are 111.43 and 113.40 for PI-coated cotton (PI-c-C) and PI-coated polyester (PI-c-PET), respectively. Young's modulus of PI-c-PET fabrics increased four times more than noncoated polyester fabric. PI coating changed the burning behavior of both cotton and polyester fabrics in a positive way. All the test results showed that these developed multifunctional textile products might find an application in different industrial areas such as automotive, aerospace, protective clothing, and so on due to easy and inexpensive production techniques and also superior properties.

Synthesis and Characterization of Aluminum 2-Carboxyethyl-Phenyl-Phosphinate and Its Flame-Retardant Application in Polyester

“…Due to the carboxyl functional group of CPA-Al being a hydrophilic group, the contact angle of polyester textile will be reduced, indicating that the polyester textile changed their surficial property from hydrophobic to hydrophilic [42][43][44]. That is why the amounts of water vapor permeation gradually increased [45]. Table 7.…”

Ecofriendly Flame-Retardant Cotton Fabrics: Preparation, Flame Retardancy, Thermal Degradation Properties, and Mechanism

“…Textiles are frequently used materials in our daily life and have been widely used in not only in homes but also industry. − Cotton fabrics, one of the biobased textiles, have the broadest market because of their outstanding properties of softness, comfortableness, hydrophilicity, and so on. − However, cotton fabrics are exceedingly flammable, and their limiting oxygen index (LOI) value is about 18%. The flammability may result in severe damage to furniture, buildings, vehicles, and even human life. − Therefore, flame retardants for cotton fabrics have attracted substantial interest of researchers both from academia and industry. , To improve flame retardancy, lots of technologies have been utilized, such as a sol–gel technique, , layer-by-layer (LbL) assembly, , plasma treatment, , flame-retardant finishing technology, , dip-coating technology, and surface grafting treatment …”

Nanomaterials for UV protective textiles

“…Therefore, UV protective textiles are also essential in these artificial significant UVR hazard industrial work areas [42]. Apart from these, UV protective textiles can be used for other industrial applications such as aerospace, automobile etc [43]. UV protective textiles can manufactured by using various approaches such as selection of fibers/yarns, weaving parameters, coating and textile finishing approaches, etc [44][45][46][47].…”