Reduction of radiation transmission through functionalization of textiles from man-made cellulosic fibers

Abstract

Both ultraviolet (UV) and infrared (IR) light have negative impact on the human health. With this background it is the main aim of the current research to realize a textile material which is able to protect against both UV light and IR light. For this research, regenerated cellulosic fibers from the Lyocell process are used and modified. Main analytical investigations are done by photo-spectroscopy in arrangement of diffuse transmission for the spectral range from 220 nm to 1400 nm. Additionally, microscopic investigations are done by scanning electron microscopy (SEM). For material development, Lyocell fibers functionalized with TiO2 particles are first processed into yarns and then into knitted fabrics. Compared to non-functionalized textiles, the transmission is reduced in the UV range due to the absorption behavior of TiO2. Subsequent dyeing with anthraquinone or reactive dyes enhanced the UV protective effect. To reduce the transmission in the near IR range (NIR), non-functionalized Lyocell knitted fabrics are functionalized with various IR absorbers in different concen­trations. With increasing concentration, the transmission de­creased. However, a grey coloration of the textile is observed simultaneously, with increased concentration. This must be con­sidered in further processing steps. With these methods for function­alization, it is possible to produce textiles that offer increased protection against UV and IR radiation. These are promising materials for the production of clothing or work wear.

T-shirts: An overview and comments on price range, functional materials and European production

“…The samples 3 to 5 are supplied by the company iQ-UV which related their products especially on the protection against UV-light. By this UV-light protection a certain prevention against sunburn, skin-cancer and skin ageing can be reached [12][13][14][15][16]. Additional, to this main functional property, two Eco labels (OekoTex100 and Econyl) are used as marketing tools.…”

“…Additional, for sample 4 residues on and between the fi bers are recorded. These residues are probable related to the presence of titaniumdioxide TiO 2 , which can be used as UV-protective agent [ 16,20,21].…”

Transmission Reduction for UV and IR Radiation with Dyed Lyocell Knitted Textiles

“…To protect against radiation, light and comfortable textiles made of appropriate materials are an adequate solution and often advantageous compared to cosmetic products. Knitted fabrics made of Lyocell, a cellulose regenerate fiber, are suitable [39]. Compared to cotton, the regenerated fiber has a higher water absorption capacity, which has a positive effect on wearable comfort when sweating [40,41].…”