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RISS 인기검색어
- 검색키워드
- 저자 : Tawfik A. Khattab (검색결과 2 건)
- 무료
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Mehrez E. El-Naggar,Ola A. Abu Ali,Dalia I. Saleh,K. M. Abu-alnja,Abd-allah M. Mnsour,Mohammed A. Abu-Saied,Tawfik A. Khattab 한국섬유공학회 2022 Fibers and polymers Vol.23 No.6
Despite the fact that Pyrovatex is widely used as a commercial flame-retardant, the release of toxic formaldehyderemains a serious problem. Fluorine-based compounds, on the other hand, have been employed to impart hydrophobic textilesurfaces, although they are exceedingly costly and poisonous. Based on those difficulties, we describe a simple one-stepmethod for coating electrically conductive cotton-nickel (Cot-Ni) blend fabric providing flame-retardant and water-repellentcharacteristics. A nickel ribbon was firstly bent around a cotton yarn as a core, and then woven into an electrically conductiveCot-Ni blend fabric, which was created by weaving the cotton-nikel hybrid threads with regular cotton yarns. The conductivefabric was coated with a composite consisting of silicone rubber (RTV) and ammonium polyphosphate (APP). The strongbinding of RTV with both APP and cotton fibres increased the flame-retardant action of cotton, according to the findings. Asa result, varied concentrations of APP were used in the composite to show that only 100 g/l of APP combined with RTVimproved the fire-retardancy. Depending on the concentration of APP, distinct hierarchical morphologies appeared on thesurface of the coated Cot-Ni fabrics. RTV also improved the hydrophobic character of the blend surface. Measurements of airpermeability, surface roughness, and stiffness were used to investigate the comfort qualities of the coated Cot-Ni blends. Eventually, those multifunctional (Cot-Ni)/RTV-APP textiles might be used in a variety of applications, such as grain storagecontainers, car seat mats, and firefighters' uniforms.
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Tawfik A. Khattab,Meram S. Abdelrahman,Hanan B. Ahmed,Hossam E. Emam 한국섬유공학회 2020 Fibers and polymers Vol.21 No.10
The surrounding environment is largely contaminated with phenols, and consequently qualitative and quantitativedetermination of phenols in water is of interest. In the current report, a low cost, naked-eye, portable and disposable cellulosicstrips-based sensor was fabricated to detect phenols in aqueous media. The cellulosic filter paper was molecularly imprintedwith Fe(III) to prepare strips sensor of Fe(III)-imprinted filter paper. The prepared strips were characterized by X-raydiffraction, scanning electron microscopy, energy-dispersive X-ray analysis and Fourier-transform infrared spectroscopy. Thesensitivity performance of Fe(III)-imprinted filter paper strips was monitored for a series of phenolic compounds. Thecolorimetric detection of gallic acid was selectively studied herein due to its greatest sensibility. The chromogenic Fe(III)-imprinted filter paper strips provided an instant color shift from yellow to purple upon binding to Gallic acid in an aqueousenvironment, as visually noted and instrumentally detected by absorption spectral and coloration measurements. The changein color of strips attributing to sensing of Gallic acid was readout at quite low limit (0.1 ppb). This sensor performance wasrationalized on formation of coordination complex between phenol and Fe+3. The facile fabricated molecularly imprintedfilter paper strips could be easily used as sensor in rapid potential for colorimetric detection of phenols.
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