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RISS 인기검색어
- 검색키워드
- 저자 : Mehrez E. El-Naggar (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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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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Mohamed Rehan,Mehrez E. El-Naggar,Abdullah M. Al-Enizi,Asma A. Alothman,Ayman Nafady,Reda M. Abdelhameed 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
In this study, to impart silkfibers with excellent coloration, UV-protection, antimicrobial activity, as wellas creatinine adsorption from artificial blood, silkfibers were designed via facile fabrication approach. These diverse properties were introduced by in-situ incorporation of nanoparticles based on either silver(AgNPs) or gold (AuNPs) as well as bimetallic (Ag-AuNPs) onto silkfibers using an eco-friendly, effectiveone-pot process. The proteins present in the silkfibers acted as a redox-active bio-template to reduce theAg(I) and Au(III) ions to their zero-valent state with simultaneous deposition of the generatednanoparticles onto the silkfiber surfaces. The obtained results clearly indicated that both AgNPs andAuNPs colored the silkfibers with brown and red color, respectively, thereby affirming the deposition ofthese metallic NPs onto and inside the surface of silkfibers as S/Ag-AuNPs. Significantly, the preparedcolored silkfibers exhibited excellent antimicrobial and cytotoxicity activities against differentpathogenic microbes as well as very good UV protection properties. Moreover, the results attestedthat the as prepared S/AgNPs and S/AuNPsfibers have good adsorption potential with maximaladsorption capacity of creatinine in artificial blood was found to be 94.2 mg/g for S/AuNPs sample, whichis 1.55 times greater than that of silkfibers.
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