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Modified with Boron nitride nanoparticles on polyamide fabrics
Summary
Researchers modified polyamide fabric with boron nitride nanoparticles and characterized the resulting material using Raman spectroscopy, X-ray diffraction, and UV-VIS spectrophotometry, finding a 9.6% increase in filtrate transparency and quantum-mechanical modeling revealing that van der Waals forces govern interactions between iron hydroxide molecules and the fabric while chemical bonds form between iron hydroxide and boron nitride nanoparticles.
Purpose . Investigation of the characteristics of polyamide fabric modified with Boron nitride nanoparticles and evaluation of its filtration properties. Methods . The Raman scattering spectra were measured using a scanning Raman microspectrometer OmegaScope AIST-NT in ZXXZ̅ geometry (λ = 532 nm, W = 25mW) with a spectral resolution of 3 cm -1 . The crystalline structure was studied using X-ray diffraction on a GBC EMMA diffractometer (Bragg-Brentano scheme, A = 0.154 nm, step size 0.02°). The filtration properties of the polyamide fabric were investigated using an SF-2000 spectrophotometer in the spectral range of 450-750 nm. The modeling of the interaction between the modified polyamide fabric and inorganic solution molecules was carried out using the Materials Studio 2020 software package with the Forcite module. Results . In the spectra of Raman scattering and X-ray diffraction patterns of fabric modified with Boron nitride nano-particles, peaks were identified at 1360 -1 cm and 2θ = 27.32. The size of the coherent scattering regions was 0.65 nm, which corresponds to the doubled interlayer spacing of Boron nitride. The change in optical density of the filtrate through the fabric was ΔD = 0.04, corresponding to a 9.6% increase in transparency. Quantum-mechanical modeling showed that van der Waals forces act between the iron hydroxide molecules and the fabric, while chemical bonds exist between the Iron hydroxide and the Boron nitride nanoparticles. Conclusion . Modification of polyamide fabric using the Langmuir-Blodgett method results in a more intense spectral profile for ordered coatings, while the immersion method with ultrasonic dispersion is suitable for bulk coatings, allowing nanoparticles to penetrate the fabric structure. These results are confirmed by X-ray diffractometry. The effectiveness of Boron nitride in improving the adsorption characteristics of polyamide fabric is also demonstrated.
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