Atomic layer deposition TiO₂/Al₂O₃ nanolayer of dyed polyamide/aramid blend fabric for high intensity UV light protection

Abstract

Ultraviolet (UV) irradiation can cause a severe damage to textiles, such as color fading, polymer degradation, and mechanical strength decrease. The aim of this study was to deposit inorganic UV blocking agents onto polyamide/ aramid dyed fabric using atomic layer deposition (ALD) technique to produce functional fabrics that are resistant to high intensity UV light. Scanning electron microscopy (coupled to energy-dispersive spectroscopy), X-ray photoelectron spectroscopy, and thermogravimetry studies demonstrated that TiO

Black phosphorus: ambient degradation and strategies for protection

“…It is known that Al 2 O 3 attenuates UV light and coupled with its low oxygen diffusion constant inhibits the photo-oxidation process. [40][41][42] However, further studies may be needed to verify this aspect. The fact remains that from the time of exfoliation/deposition of BP till the time it is encapsulated, oxide species are inevitably formed on the surface and it is impractical to assume otherwise.…”

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“…Some fabrics such as cotton, silk, wool, cellulose, polyvinyl alcohol, polyamide are kind of fabrics with abundant surfacebound active groups including -OH, -COOH, -NH 2 , which are widely accepted as effective groups to form covalent bond with ALD inorganic layers (ZnO, TiO 2 , Al 2 O 3 and so on). The multiple functions properties, such as antibiosis, UV-blocking [15], antioxidation [16][17][18], superhydrophobicity [13,19], conductivity [11,[20][21][22][23][24][25][26][27][28][29][30][31], and retardancy [32,33] could be endowed to polymeric fabrics after ALD of different inorganic layers onto their surface.…”

“…Inorganic UV absorbers like ZnO, SiO 2 , and TiO 2 in the micro-or nanoscale are in particularly attractive due to their superior performance. Xiao et al [15] deposited TiO 2 , Al 2 O 3 , and TiO 2 /Al 2 O 3 nano-layer onto dyed polyamide/aramid blend fabric surface. The dyed fabrics after ALD coating showed excellent UV resistance and high resistant to UV-induced mechanical strength damage.…”

Preparation and performance of the novel PVDF ultrafiltration membranes blending with PVA modified SiO2 hydrophilic nanoparticles

“…However many researchers have found that many hydrophilic polymers were incompatible with PVDF, which will result in a decrease in mechanical strength , and with the increasing of using time, some hydrophilic polymers can spread out from membrane matrix which could lead to a decrease in the hydrophilicity and in the anti‐fouling property as well . Compared with the hydrophilic polymers, the addition of nanoparticles, like titanium dioxide (TiO 2 ) , alumina (Al 2 O 3 ) , zirconium dioxide (ZrO 2 ) , and silica (SiO 2 ) , can enhance membrane permeability, hydrophilicity, mechanical strength, rejection, and membrane surface formation as well. Of all nanoparticles, SiO 2 was used most extensively because of its properties of ease handling and superior mechanical and thermal stability .…”