شماره ركورد كنفرانس :
5048
عنوان مقاله :
Swelling Rate Analysis of Anionic Hydrogels in Distilled Water and Various Solutions with Various Ionic Strengths
Author/Authors :
Saba ،Sharafoddinzadeh Chemical Engineering Department - Faculty of Engineering - Arak University, Arak, Iran , Hamid Reza ،Norouzi Chemical Engineering Department - Faculty of Engineering - Arak University, Arak, Iran , Baharak ،Sajjadi Chemical Engineering Department - Faculty of Engineering - Arak University, Arak, Iran , Hamideh ،Eskandari Chemical Engineering Department - Faculty of Engineering - Arak University, Arak, Iran , Abolfazl ،Barati Chemical Engineering Department - Faculty of Engineering - Arak University, Arak, Iran
كليدواژه :
hydrogel , electrolyte solution , acrylamide , swelling rate , diffusion mechanism , acrylic acid
عنوان كنفرانس :
ششمين كنگره بين المللي مهندسي شيمي
چكيده لاتين :
Anionic acrylamide-based hydrogels were synthesised through a free radical copolymerisation of acrylamide and
acrylic acid co-monomers. The effect of the amount of ionisable monomer change on the network and also the change
in ionic strength of swelling environment on the diffusion mechanism, equilibrium swelling, and equilibrium swelling
rate of the hydrogels were analysed. Solutions of sodium hydroxide, ammonium nitrate, and ammonium sulphate with
concentrations of 0.1, 0.5, and 1 M were chosen as electrolyte solutions. Swelling experiments were carried out by
using common methods of gel weighing and comparing swollen gel weight versus the dried ones. It was observed that
as the acrylic acid monomers increase in the 3-dimensional network of hydrogel, the amount of equilibrium swelling
and the swelling rate increase. Increasing the ionic strength of the surrounding solution causes decrease in the
equilibrium swelling and the swelling rate of ionized gels. In solutions with a high ionic strength (ammonium sulphate
0.1 M) the swelling behaviour of the hydrogel was almost similar to that of neutral hydrogel with a similar composition.
