Fabrication and Characterization of Nylon 6/ MWCNTs Conductive Polymer by Electrospinning Technique

Nylon 6 / with (0, 0.1, 0.2, 0.4, 0.8, 1) wt. % Multiwall Carbon Nano Tubes MWCNTs films conductive polymers were prepared by electrospinning technique. Electrical conductivity for Polymeric solution were measure, increases from (3.8 x 10-3 S/cm) for pure nylon 6 solution and increase directly with MWCNTs concentration to (10.2 x 10-3 S/cm) at 1 % MWCNTs concentration. Prepared films morphology was tested by SEM and the average fibers diameters measure statically was 140 nm. The nanofibers film show enhancing the electrical conductivity by increase MWCNTs concentration, from (2.9 x 10-9 S/cm) for pure nylon 6 film ,increased to (1.042x10-6 S/cm) for 0.8 wt. % MWCNT . The solution of nylon 6 / 1% MWCNT cannot be electrospun due to low viscosity and high electrical conductivity associated with high percentage of MWCNT , So there is no produced film from this solutio

Effect of MWCNT addition on improving the electrical conductivity and activation energy of electrospun nylon films

AbstractNylon 6/with (0, 0.1, 0.2, 0.4, 0.6 and 0.8) wt. % MWCNTs films conductive polymers were prepared by electrospinning technique. Prepared films morphology test by SEM and the average fibers diameters measure statically was 140 nm for (nylon/0.4 wt. % MWCNTs film). The nanofibers films show enhancing the electrical conductivity by increase MWCNTs concentration, from (2.9 × 10−9 S/cm) for pure nylon film to (1.042 × 10−6 S/cm) for 0.8 wt. % MWCNT. The activation energy decreased with increasing the MWCNTs concentration, the activation energy was (0.068, 0.057, 0.0536, 0.0523, and 0.045 and 0.077) eV for (pure nylon, nylon/0.1, 0.2, 0.4, 0.6, 0.8% wt. % MWCNTs) films. The calculated result of 0.077 eV is even higher than the activation energy of the pure film which is 0.068 eV, this is may be due to changing the state of MWCNTs dispersion in the host polymer (nylon 6) as concentration of MWCNTs increased

The Role Of OprD Gene In The Carbapenems Resistance In Pseudomonas Aeruginosa Isolated From Burns Infection In Al-Najaf Province

Carbapenems-resistant Pseudomonas aeruginosa mutants are disseminating around the globe. 90%-100% of P. aeruginosa isolates became Carbapenems-resistant mutants in some countries like Thailand and Brazil respectively. Finding alternative therapeutic options instead of carbapenems is the global duty of researchers and institutions. The OprD gene mutation/s has the main role in carbapenems resistance appearance in P. aeruginosa due to the decrease in the outer membrane permeability for carbapenems. Aim: This study aims to assess the antimicrobial activity of carbapenems (imipenem, and meropenem) against Pseudomonas aeruginosa isolated from hospitalized burn patients in Al-Najaf/Iraq, and the role of OprD gene mutations in the resistance. Methods and materials: 76 samples were collected from hospitalized burn patients suffering from burn wounds infections, and the identity of each cultivated microbe was confirmed by VITEK compact system 2 and further confirmation for P. aeruginosa isolates via performing molecular identification by OprD gene detection, 10/12 carbapenems resistant isolates, 1/12 sensitive, and 1/12 intermediate resistant were submitted to OprD gene sequencing by Sanger method </jats:p