Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : electrical conductivity

Effect of NaCl Solution Addition on Improving Some of the Physical Properties of Nylon 6 Solutions used for Electro spinning Purpose

Fadhil A. Chayad; Akram R. Jabur; Noor M .Jalal

Engineering and Technology Journal, 2016, Volume 34, Issue 7, Pages 1265-1274

Nylon 6 / (0.5, 1, 1.5, 2 and 2.5) wt. % NaCl solutions were prepared for electrospinning technique. The electrical conductivity of polymeric solutionincreases directly with NaCl concentration from 3.8 (mS/ cm) for pure nylon solution to 12.7 mS/cm at nylon 6/ 2.5 wt. % NaCl, and slight decreasing the viscosity and the surface tension of the solution . Increasing the polymeric solution conductivity cause more electrical charges carried by the electrospinning jet. Prepared films morphology tested by SEM and the average fibers diameters measured for each concentration. In this research, it was proved that the nanofibers film shows decreasing the average diameter by increasing NaCl concentration.

Studying the Effect of Glass - Fiber on Electrical Conductivity of Polyamide Composite Material

Nirvana A. Abed Alameer; Duha Abed Alameer; Haidar A. Hussein

Engineering and Technology Journal, 2012, Volume 30, Issue 17, Pages 3098-3103

The electrical conductivity of glass fibre reinforced polyamide composite materials
was investigated for both weight fraction of glass fibre and frequency. This study is
focused on various types of glass fibres (S, E&C) and different weight fractions (10,
20, 30 &40) at frequencies (50, 500, 1000, 105 &106) Hz. The results exhibited
addition glass fibre fillers on matrix material were apparent good electrical
conductivity at high weight fraction comparing to their low percentage account of the
fillers created conductive path in the matrix material, it reached to (2.52, 2.1&2.21)*
10-10 S/cm for C-glass fiber, E-glass fiber and S-glass fiber; respectively at %40 weight
fraction. Also that electrical conductivity increased with increasing in frequency due to
charges movement in the dielectric material.

Development of the Electrical Conductivity of PEM Fuel Cell

Nirvana A. A bud; Raid K. Salim

Engineering and Technology Journal, 2012, Volume 30, Issue 12, Pages 2016-2026

This research is aimed to develop the electrical conductivity of PEM fuel cell
through the using of a series of graphite plates. The effect of width, thickness of plates
in addition to the current and gas flow rate (hydrogen and oxygen) were studied.
Results showed that electrical conductivity can be reached to the optimum value
(850Scm), when cell thickness, current and gas flow rate are 0.3cm, 8.13A and 0.6
Lmin respectively.

Studying the Effect of Water on Electrical Conductivity of Cu Powder Reinforced Epoxy Composite Material

Nirvana A. Abd Alameer

Engineering and Technology Journal, 2012, Volume 30, Issue 2, Pages 197-202

We study electrical conductivity behavior of Cu-powder reinforced epoxy
composite material in different solutions (distilled water, tap water &3.5%NaCl)
with a weight fraction (5, 15, 30 &45) was investigated for (7) weeks immersion
time. The results exhibit that electrical conductivity increases as increasing
immersion time due to the specimen was absorbed the solutions. The maximum
values were reached with 3.5% NaCl solution because of Cl ions whereas electrical
conductivity not apparent in distilled water was attributed to pure water containing
no ions is an excellent insulator.

Electrical And Thermal Properties Of Epoxy Resin Filled With Carbon Black

Waffa Abdul Kazem; Najat j. Salah; Adnan A. Abdul Razak

Engineering and Technology Journal, 2009, Volume 27, Issue 11, Pages 2223-2232

Thermal and electrical conductivity of an insulating polymer can be achieved by
dispersing conducting particles (e.g., metal, carbon black) in the polymer. The resulting materials
are referred to as conducting polymer composites. Electrical and thermal properties of epoxycarbon
black composites were studied in this work. The weight fraction of the carbon blacks
ranged from 0.0 up to 20 wt % with the epoxy resin. By discharging a high voltage through the
composite it was found that the resistivity of the composite decreased. Epoxy-carbon black
composites show significant differences from the neat epoxy resin measured in the frequency
range. Conductivity percolation threshold was found when carbon blacks is added in the range of
1 and 2 wt%. It was found that the epoxy/ carbon black composites have better thermal properties
than the neat epoxy.