Browsing by Author "Shalaby A.S.A."

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    Sensitivity and Performance of Dinitroanisole (DNAN) in comparison with TNT
    (2022-01-01) Hussein A.K.; Elbeih A.; Abdelhafiz M.; Ahmed H.S.; Shalaby A.S.A.; Azazy A.; Saleh A.
    The constant search for protection the soldier during training and participation in hostilities led us to aspire to develop types of energetic materials of a special nature that qualify them to reach the maximum levels of safety during handling, transportation and uses. In this work, we focus on one of these compounds, which is the main component of the preparation of low sensitive compositions. DNAN is an explosive with low sensitivity. Preparation of DNAN in laboratory scale was performed; explosive characterization was presented. Impact and friction sensitivities of DNAN, heat of combustion and detonation velocity were specified. TGA and DSC were used to investigate the DNAN thermal behavior under specific conditions. It was concluded that sensitivity of DNAN is lower than TNT and the chosen cyclic nitramines. The detonation properties of DNAN are slightly lower than TNT however DNAN is candidate individually or with other explosives to replace TNT in low sensitive compositions to full fill the safety and security manipulation of ammunitions.
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    Synthesis and characterization of low-density polyethylene decorated with ag/rgo nanocomposite for packaging applications
    (2020-05-01) Mohamed S.K.; Abdou A.A.; Shalaby A.S.A.; Mohsen R.M.; Zikry A.A.F.
    Films of low-density polyethylene (LDPE) either blended or coated with different weight percentage (2, 4 and 6 %) of silver-modified reduced graphene oxide (Ag/rGO) have been prepared. Neat LDPE and LDPE blended with Ag/rGO nanocomposite films were prepared by simple casting method while LDPE films coated by Ag/rGO nanocomposite were prepared by applying corona discharge to the as prepared neat LDPE. The prepared samples have been characterized by FTIR, XRD, SEM, EDAX, TEM, DSC and TGA. The mechanical properties and the antimicrobial activities have been examined and compared with that of neat LDPE. From the obtained results, the mechanical properties of polyethylene film were enhanced by blending with very small amount of the as-prepared nanocomposite. The tensile strength of the LDPE film increased up to 60% when added just 4 wt% of Ag/rGO nanocomposite. Coating LDPE by Ag/rGO nanocomposite did not improve the mechanical properties but exhibited antimicrobial activities against E.Coli and S.Aureus. As the % of Ag/rGO nanocomposite increased in the surface coating layer the antibacterial efficiency increased.