Synthesis and application of nanoestructured reflective materials

Abstract

The search for technological differentiation has been increasing significantly in the textile market for functional clothing, whether in fashion, fitness or workwear as an alternative to overcome competition and gain space in the market with increasingly demanding consumers. In this project nanostructured reflective materials for application in fabrics with near thermal infrared reflection properties and blockage of ultraviolet radiation without significant change of touch, softness and color in the final product will be developed, resulting in a fabric that provides the user greater thermal comfort and protection against the damaging action of ultraviolet radiation, without changing its original appearance. In order to reach this objective, Hollow Glass Microspheres (MEVO) will be covered by ZnO:Al and TiO2:Al Nanostructured and Transparent Fine Films (FFNT) and subsequently applied to textile substrates by impregnation via foulard. The MEVO coated by the FFNT will be obtained by the sol-gel dip-coating method. The properties of ultraviolet radiation (UV) blockage and infrared radiation (IV) reflection will be studied, as a function of the concentration of the MEVO-coated mixture by the FFNT and the final dosage of the additive in the textile substrates, according to international standards. The deposited ZnO:Al and TiO2:Al FFNTs will have their structure characterized by X-ray Diffraction and the roughnesses and grain sizes of the ceramic films will be determined by Scanning Electron Microscopy and Atomic Force Microscopy. It is hoped that the nanostructured reflective additive can be used and applied in different textile bases, generate a benefit easily perceived by the consumer and, in this way, contribute to an increase of the participation of the national textile industry in the market through high differentiation in functional and technological products. (AU)