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RISS 인기검색어
- 검색키워드
- 저자 : Reda M. Abdelhameed (검색결과 2 건)
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Reda M. Abdelhameed,Eman Alzahrani,Abdallah A. Shaltout,Hossam E. Emam 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.94 No.-
Essential oils are characterized by their potency as anti-pathogens and anti-oxidants. However, there is alimitation in the application due to uncontrollable release. Therefore, this approach is focused ondesigning mesoporous composite for temperature-controlled release of essential oils. Mesoporouscomposite namely zeolitic imidazole frameworks@microcrystalline cellulose (ZIF@MCC), was successfullysynthesized by the immediate growth of ZIF based on Zn and Co separately within MCC matrix. Theestimated masses of ZIF within MCC were 263.4 – 296.3 g/kg. Orthorhombic dodecahedron crystallineZIFs in micro size was massively covered MCCfibrils. Release of thyme and cumin as two essential oils,from mesoporous ZIF@MCC composites was investigated at different temperatures. After 5 days, therelease of essential oils were significantly slowed down to be 49.3 – 119.7 mg/g (18.5 – 44.9 %) forZIF@MCC composites compared to 248.0 – 265.7 mg/g (93.0 – 99.6 %) for MCC. Elevation of temperaturewas accompanied by slight faster release attributing to the ease liberation of essential oils by heating. Releasing mechanism of essential oils is mainly supposed due to combination between physical inprinciple as a solute diffusion and chemical processing’s in small relevant.
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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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