An Efficient Antimicrobial Performance of Hybrid Functionalized MWCNTs/GNPts Bionanocomposites Based on Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)

Haloferax mediterranei archaea has been utilized to biosynthesize Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) polyester from date waste as carbon source. The produced biopolymer has been composited with different percentages (1 %, 3 %, 5 % and 10 %) of a hybrid filler based on 1 : 1 carboxylated multi-walled carbon nanotubes (CMWCNTs) and graphene nanoplates (GNPts). The synthesized bionanocomposites PHBV/(CMWCNTs-GNPts)(1,3,5,10%) have been characterized by FTIR, TGA, XRD, SEM and EDX. In addition, they were studied for their antibacterial properties against gram negative and gram positive strains of M. Luteus, S. Aureus, P. Aerugensa and E. Coli, and the results showed excellent antibacterial effect especially against gram negative strains of P. Aerugensa and E. Coli, showing inhibition zones of 52 % and 81 %, respectively, compared to chloramphenicol control that is used. Also, antifungal activities were investigated against G. Candidum and C. Albicans and showed that the produced bionanocomposites had inhibition zones of 32 % and 73 %, respectively, compared to the antifungal drug clotrimazole which was used as control. The produced PHBV biopolymer has been composited with different percentages (1 %, 3 %, 5 % and 10 %) of a hybrid filler based on CMWCNTs and GNPts. The antimicrobial performances have been investigated against Gram-negative, Gram-positive and fungi strains. The results showed excellent antibacterial against P. Aerugensa and E. Coli (52 % and 81 %), respectively and 32 % and 73 % for antifungal activities of G. Candidum and C. Albicansimage