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Item type:Publication, Nanocoating on cotton fabric with nitrogen-doped graphene quantum dots/titanium dioxide/PVA: an erythemal UV protection and photoluminescent finishing(Elsevier Editora Ltda, 2022-05-01)Prolonged exposure to ultraviolet (UV) radiation from the sun can result in several skin problems, such as accelerating aging, burns, blemishes, or even cancer. Even when wearing clothes, there is still a risk that the user will be exposed to UV radiation and suffer skin damage. Therefore, it is necessary to apply anti-UV treatments to the clothes and fabrics used, so that users become safe. Nitrogen doped graphene quantum dots (N-GQD) and titanium dioxide (TiO2) NPs are materials that have a broad spectrum of UV absorption and are promising candidates to be applied in functional finishing in use on textile materials, giving textiles property anti-UV. The aim of this research is to evaluate the synergy effect between N-GQD and TiO2 NPs in getting a nanocoating that can be applied on a cotton fabric, add photoluminescent and anti-UV properties. The nanocoatings obtained were applied via industrial discontinuous method, the high-pressure and high-temperature exhaustion process to the cotton fabric using polyvinyl alcohol as a binding agent. According to the UV protection assessment, it was observed that both materials are excellent UV absorbers and their ultraviolet protection factor (UPF) are highly dependent on the concentrations used in the nanocoated cotton fabrics. Thus, nanocoated cotton with TiO2, N-GQD and TiO2/N-GQD revealed an UPF of +50, which established their effectiveness in protecting against UV radiation. They also withstand up to 20 wash cycles with no change in UPF. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Surface modification of ZnO quantum dots coated polylactic acid knitted fabric for photocatalytic application(John Wiley and Sons Inc, 2022-07-05)In this work, ZnO quantum dots (ZnOQD) were synthesized by Sol–gel synthesis and impregnated on polylactic acid (PLA) knitted fabric through self‐assembly of different cycles from layer‐by‐layer (LBL) using cationic agent Poly(diallydimethylammonium chloride) (PDDA). Then, morphological, chemical and photocatalytic properties were studied. The results demonstrate that the synthesis provided 8 nm Wurtzite‐type ZnO nanoparticles. In addition, X‐ray photoelectron spectroscopy (XPS) spectra, X‐ray diffraction (XRD) and scanning electron microscopy (SEM) proved the inclusion of ZnOQD on the surface of PLA matrix, which allowed the evaluation of its photocatalytic properties, therefore, coated PLA with five cycles of ZnOQD obtained the best result for degrading 85% of the dye Rhodamine B (RhB) in 360 min under UV radiation, in addition to its reusability for another five cycles of photocatalytic activity. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Superhydrophobic and supercapacitive reduced graphene oxide/fluoropolymer nanocoating on polyester fabric via spray mist coating(Elsevier BV, 2025-07-05)Graphene oxide (GO) has attracted significant attention due to its unique structure and wide applications in fields such as renewable energy, microelectronics, and biotechnology. However, the combination of superhydrophobicity and supercapacitance in a single textile coating remains largely unexplored, representing a critical gap in current research. This study addresses this gap by developing a multifunctional nanocoating applied to polyester fabric using reduced graphene oxide (RGO) and a fluoropolymer (FP) via a spray mist coating technique. GO was synthesized by the Hummers and Hoffman method and reduced with environmentally friendly glucose. Structural and morphological modifications were confirmed through XRD, RAMAN, FTIR, XPS, and SEM-FEG analyses. The resulting nanocoated fabrics exhibited exceptional water repellency with contact angles exceeding 150°, enhanced washing, and abrasion resistance. A Box-Behnken design optimized key process parameters (RGO/FP ratio, curing temperature, and time) to achieve peak performance at a contact angle of 160° with a 1:5 ratio (RGO/FP), a curing temperature of 125°C, and a curing time of 2 minutes. Furthermore, the functionalized polyester fabric demonstrated a remarkable specific capacitance of 305.88 F/g, surpassing results from comparable studies and making it suitable for wearable supercapacitor applications. Durability tests revealed stable superhydrophobicity and structural integrity after five wash cycles, equivalent to 25 home washes. SEM-FEG analysis highlighted nanocoating-induced roughness, enhancing the lotus effect, while electrochemical evaluations indicated notable improvements in conductivity and energy storage. This environmentally friendly spray mist coating technique offers a scalable and sustainable approach for creating multifunctional textiles, paving the way for advanced applications in smart fabrics and flexible electronics.Scopus© Citations 8 2