Novel approach in investigation of the poly(acrylic acid) hydrogel swelling kinetics in water

2007 ◽  
Vol 107 (6) ◽  
pp. 3579-3587 ◽  
Author(s):  
B. Adnadjevic ◽  
J. Jovanovic
Keyword(s):  
Acrylic Acid ◽  
Swelling Kinetics ◽  
Novel Approach ◽  
Hydrogel Swelling ◽  
Poly Acrylic Acid

DESCRIPTION OF CHITOSANE GRAFTED ACRYLIC ACID BASED HYDROGEL SWELLING KINETICS AND THEIR USE IN NEW DESIGNED SYSTEM

2021 ◽  
Author(s):  
Tamara Erceg ◽  
◽  
Gaja Brakus ◽  
Dejan Kojić ◽  
Nevena Vukić ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Room Temperature ◽  
Cost Effective ◽  
Swelling Kinetics ◽  
Swelling Ratio ◽  
Empirical Dependence ◽  
Step Procedure ◽  
Dynamic Swelling ◽  
Hydrogel Swelling

Chitosan based hydrogel was synthesized via free-radical polymerization in a two-step procedure, after modification of chitosan by acrylic acid. Dynamic swelling test was carried out in distilled water at room temperature. Swelling kinetics was modeling using the principle of assuming the equation for a swelling ratio-time empirical dependence. Using regression analysis in this way gives the possibility for simpler determination of swelling ratio-time empirical dependence, knowing the graph functions. Obtained hydrogel was used for preparation of new bilayer hydrogel system which has potential application in wound dressing systems and other fields where pH sensitivity and improved mechanical properties of biopolymers are required in framework of green, cost-effective process.

A novel approach of homogenous inorganic/organic composites through in situ precipitation in poly-acrylic acid gel

2007 ◽  
Vol 61 (3) ◽  
pp. 629-634 ◽  
Author(s):  
Xinyu Shen ◽  
Hua Tong ◽  
Zhihong Zhu ◽  
Peng Wan ◽  
Jiming Hu
Keyword(s):  
Acrylic Acid ◽  
Novel Approach ◽  
Organic Composites ◽  
Acid Gel ◽  
Poly Acrylic Acid

scholarly journals Comparison of the swelling kinetics of a partially neutralized poly(acrylic acid) hydrogel in distilled water and physiological solution

2007 ◽  
Vol 72 (11) ◽  
pp. 1139-1153 ◽  
Author(s):  
Aleksandar Kostic ◽  
Borivoj Adnadjevic ◽  
Aleksandar Popovic ◽  
Jelena Jovanovic
Keyword(s):  
Acrylic Acid ◽  
Physiological Solution ◽  
Kinetics Model ◽  
Isothermal Kinetics ◽  
Swelling Kinetics ◽  
Distilled Water ◽  
Equilibrium Degree ◽  
Swelling Rate ◽  
Kinetics Of ◽  
Poly Acrylic Acid

The isothermal kinetics curves of the swelling of a poly(acrylic acid) hydrogel in distilled water and physiological solution at temperatures ranging from 20 to 40 ?C were determined. The possibility of applying both the Fick?s kinetics model and kinetics model of the first order chemical reaction to the swelling kinetics of the PAA hydrogel in distilled water and physiological solution were examined. It was found that the possibilities of applying these models were limited. The new model of the kinetics of swelling in distilled water and physiological solution was established. The kinetic parameters (Ea, ln A) for the swelling in distilled water and physiological solution were determined. The decrease of the equilibrium degree of swelling and the saturation swelling rate of the swelling of the PAA hydrogel in physiological solution compared to swelling in distilled water could be explained by the decreased differences in the ionic osmotic pressures between the hydrogel and the swelling medium. The increase of the initial swelling rate in the physiological solution might be caused by an increased density of charges at the network and by an increased affinity of the network towards the water molecules. The increase of the activation energy of the swelling of the PAA hydrogel in the physiological solution is a consequence of its additional "ionic crosslinking".

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