a New forms of hybrid multiaxial nanocomposites with enhanced mechanical and stab resisting properties are presented. This study is motivated by the lack of knowledge in the study of the multiaxial fabric nanocomposites with two modified thermoplastic matrices for antiballistic protection. Introduction of 5 wt.% silica nanoparticles in the composite of polyurethane/p-aramid/poly (vinyl butyral) leads to significant improvement in mechanical properties, and the addition of silane as a coupling agents and glutaraldehyde as a crosslinking agents yielded maximal values of storage modulus, tensile modulus and anti-stabbing properties for hybrid nanocomposites. Ballistic resistance testing and penetration depth of the hybrid nanocomposites were visualized using image analysis. Copyright
address: Dusica B. Stojanovic duca@tmf.bg.ac.rs † Footnotes relaƟng to the Ɵtle and/or authors should appear here. Electronic Supplementary Information (ESI) available: Results of DSC analysis of ultrasonic treatment of PEO films. Nanoindentation measurements of composite films and keratin-PEO blend with different content ratio. Discussion of FTIR spectra of composite films. FESEM images of composite films. Optical images of keratin-PEO blend with different content ratio. SeePolyethylene oxide (PEO) functionalized graphene (f-G) was prepared by ultrasonication of pristine graphene in PEO aqueous solution. Feasible sonication protocol of PEO degradation and graphene functionalization enabled fabrication of solvent casted nanocomposites. Additionally, the steps to form new bio-nanocomposite films have been described, taking the advantage of the combination of graphene, PEO and keratin fibers from poultry feather waste, to design the aforementioned bio-nanocomposite films, which allow extraordinary properties that would have promising applications as eventual packaging materials and enable bio-waste keratin to be converted to added-value material. Compared to neat PEO, addition of only 0.3 wt.% f-G provided increase of 92 % of storage modulus. These findings are similar to the nanoindentation results, which yielded the increases for reduced modulus of same composition for about 92 %. Nanoindentation testing shows that the incorporation of 0.3 wt.% f-G increased reduces modulus and hardness of keratin-PEO blend for about 155 and 99 %, respectively.
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