Preliminary Material

Fitzsimmons, Phil; Charalambous, Zoe; Wiesner, Susan L.

doi:10.1163/9781848881709_001

Cited by 1 publication

(1 citation statement)

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“…49 For leaching tests of the metal NMP coatings, 2 × 2 × 0.1 cm swatches of composite and reference samples were immersed in, e.g., 5 mL 0.9% saline, and NMP-leachant was measured periodically via UV−vis spectroscopy and inductively coupled plasma-optical emission spectroscopy (ICP-OES) against standard comparisons curves from dilutions of known concentration. 50 ICP-OES is a highly sensitive trace element detection method that can identify the types and ratios of elements in complex samples, used to test the leaching characteristics of the ZnO overcoating. The zinc concentration of aerosolized samples was determined against a calibration curve prepared using a Sigma-Aldrich ICP zinc element standard solution, while a blank, and a three-point calibration curve were generated at concentrations of 1.0, 5.0, 10.0 ppm for the silver element standard, and a linear fit chosen.…”

Section: Coated Substrate Testingmentioning

confidence: 99%

Sonochemical Coating of Textiles with Zinc Oxide: Robust, Silver-Seeded Growth on Cotton for Effective UV Shielding

Noor,

Mutalik,

Younas

et al. 2023

ACS Appl. Eng. Mater.

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We report on the in situ silver-seeded generation and growth of pure wurtzite zinc oxide (ZnO) onto woven cotton fabric substrates via sonochemical deposition. Coating leaching issues and limitations related to processing temperature often restrict the direct application of crystalline metal oxides onto soft matter substrates under ambient conditions. Herein, we describe a mechanochemical synthesis route that allows for the direct generation and durable incorporation of crystalline metal and metal oxide materials onto polymeric substrates, at high loading, without the use of binders, annealing steps, low-vacuum processing, or any other conventionally encountered processing procedures. The model system of Ag-seeded, ZnO on woven cotton textile fabrics presented here demonstrates this efficacy while further doping of the system with Fe allows for the ZnO coating optical properties to be readily tuned. Samples were characterized with X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV−vis transmittance-reflectance spectroscopy, inductively coupled plasma optical emission spectroscopy, as well as air permeability and tensile testing. While the results for this model system show excellent crystallinity, attachment durability/washfastness, and tunable optical parameters, this synthesis method also offers broader routes to the ready incorporation of textured crystalline metal, metal oxide, and other systems into low-temperature stable, soft matter substrates. For the illustrative application of UV-blocking capability, the coated substrates output consistently high UV-protection factor values (>UPF50), even after 51 wash laundering cycles, and with near-complete suppression of UV-A and UV-B radiation.

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Section: Coated Substrate Testingmentioning

confidence: 99%