1. The Fourth Cultural Season
for The Department of
Materials Engineering
الموسم الثقافي الرابع لقسم هندسة المواد
University Of Technology
Department of Materials Engineering
Polymer Engineering Branch
By: Ahmed Hashim Aliwi
Supervised By: Asst.Prof.Dr. Akram R. Jabur
الجامعـــــة التكنولوجيـــــة
قســــم هندســـة المـــواد
فـــرع هندســـة الپوليمرات
اعداد:أحمد هاشم عليوي
اشراف:ا.م.د أكرم رحيم جبر
Additives affects on electrical conductivity used for conductive polymer fabrication
Abstract :
As it is known that polymers is insulating material for electricity due to the large energy gap and absence of enough free electrons to enhance the electrical conductivity, so that the project is include adding salts that activate the electrons to transfer from valence band to conductive band so conduct electricity and also reduce the energy gap .
The project use poly vinyl alcohol (PVA) as the polymeric material that are used for enhance it's conductivity by adding some types of salts (NaCl, CaCl2, CuCl2, MgCl2) in different concentration and study the effect of these salts that added to polymer .
Experiment
Preparation of a polymer solution for poly vinyl alcohol (PVA) 7% with water solution .
Preparation of salt solution for different salts (NaCl, CaCl2, CuCl2 , MgCl2) 10% with water solution .
Adding salt solution to polymer solution in different ratio (0:100 ,5:95 ,10:90 ,15:85 ,20:80 ,25:75 ,30:70) and study the effect of these salts on the electrical conductivity for polymer .
Result
After mixing salt solution to polymer solution .
Observed that increasing salt concentration (0% ,0.5% ,1% ,1.5% ,2% ,2.5% ,3% ) , increase the electrical conductivity of the polymeric solution .
Table : The result of the electrical conductivity test for adding different salt solution to PVA (7%) water solution at room temperature
Figure : The relationship between salt concentration for different additives and PVA (7%) water solution electrical conductivity
Electrical conductivity for different additives(mS/cm)
Concentration
MgCl2
CuCl2
CaCl2
NaCl2 %
1.047
4.52
5.09
5.55
8.22
0.5
8.05
9.35
9.96
14.98 1
11.66
13.53
15.28
21.5
1.5
15.2
17.6
20.8
27.9 2
18.47 21
25.2
34.6
2.5
21.7
24.1
29.7
41.2 3
Figures illustrated the relationship between CuCl2 additives concentration with electrical conductivity , surface tension & viscosity of PVA (7%) water solution
From this work electrical conductive polymeric nano-fiber of poly vinyl alcohol fabricated by electrospinning technique
Pure PVA (7 %) Thin film
SEM image for Pure PVA (7 %)
Electro-spinning
تم تصميم هذا العمل خصيصاً للموسم الثقافي الرابع لقسم هندسة المواد / الجامعة التكنولوجية
فكرة وتصميم: أ.م. ماجد حميد عبد المجيد, الباحث حيدر باسل علي