Analysis of swelling behavior of poly(methacrylamide-co-methacrylic acid) hydrogels and effect of synthesis conditions on water uptake

2006 ◽  
Vol 66 (4) ◽  
pp. 431-440 ◽  
Author(s):  
Sunil Kumar Bajpai ◽  
Surinderpal Singh
Keyword(s):  
Water Uptake ◽  
Methacrylic Acid ◽  
Swelling Behavior ◽  
Synthesis Conditions

In air synthesis of GA-cl-poly(MAA) hydrogel and study of its salt- resistant swelling behavior in different salts

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
B. S. Kaith ◽  
Shabnam Ranjta ◽  
Kiran Kumar
Keyword(s):  
Free Radical ◽  
Reaction Time ◽  
Methacrylic Acid ◽  
Salt Concentration ◽  
Gum Arabic ◽  
Swelling Behavior ◽  
Temperature Reaction ◽  
Reaction Parameters ◽  
Potassium Persulphate ◽  
Cross Linker

AbstractA novel hydrogel has been synthesized by grafting methacrylic acid (MAA) onto Gum arabic (GA) through free radical graft co-polymerization in the presence of potassium persulphate (KPS) as an initiator and hexamethylene tetramine (HMTA) as a cross-linker. Various reaction parameters like reaction temperature, reaction time, concentration of initiator, amount of solvent, pH, concentration of monomer and concentration of cross-linker were optimized. GAcl-poly(MAA) was characterized by FTIR spectroscopy, SEM and TGA-DTA techniques. Optimized polymer was studied for its salt-resistant swelling behavior in different solutions: NaCl, MgCl2, CaCl2, FeCl3, ZnCl2 and BaCl2 as a function of salt concentration, temperature and pH. It was observed that GA-cl-poly(MAA) exhibits following salt-resistant swelling trend in different salts: NaCl > ZnCl2 > MgCl2 > CaCl2 > BaCl2 > FeCl3

scholarly journals New Semi-IPN Hydrogels Based on Cellulose for Biomedical Application

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
S. K. Bajpai ◽  
M. P. Swarnkar
Keyword(s):  
Free Radical ◽  
Kinetic Model ◽  
Water Uptake ◽  
Diffusion Coefficients ◽  
Biomedical Application ◽  
Paper Industry ◽  
Swelling Behavior ◽  
Late Time ◽  
Cellulose Pulp ◽  
Uptake Data

Cellulose pulp, obtained from a paper industry, has been dissolved in PEG/NaOH system and the resulting solution has been polymerized in the presence of monomer acrylic acid (AA) and crosslinker N,N′ methylene bisacrylamide via free radical polymerization. The Cell/PEG/poly (SA) ternary semi-IPN hydrogel, so prepared, was characterized by FTIR and TG analysis. The dynamic water uptake of various hydrogels, having different compositions, was investigated in the physiological buffer of pH 7.4 at 37°C. The various hydrogels exhibited chain-relaxation controlled swelling behavior. The uptake data was best interpreted by Schott kinetic model. The various diffusion coefficients, that is, initial (Di), average (Dave), and late time (DL), were also calculated using the dynamic water uptake data. The hydrogels showed fair pH and salt-dependent swelling behavior.

The impact of the volumetric swelling behavior on the water uptake of gas shale

2018 ◽  
Vol 49 ◽  
pp. 132-144 ◽  
Author(s):  
Alberto Minardi ◽  
Alessio Ferrari ◽  
Russell Ewy ◽  
Lyesse Laloui
Keyword(s):  
Water Uptake ◽  
Swelling Behavior ◽  
Gas Shale ◽  
The Impact

Poly(Methacrylic Acid-g-Ethylene Glycol) Hydrogels as pH Responsive Biomedical Materials

1993 ◽  
Vol 331 ◽  
Author(s):  
Cristi L. Bell ◽  
Nicholas A. Peppas
Keyword(s):  
Hydrogen Bonding ◽  
Ethylene Glycol ◽  
Methacrylic Acid ◽  
Swelling Behavior ◽  
Ph Responsive ◽  
Responsive Membranes ◽  
Swelling Studies ◽  
Environmentally Sensitive ◽  
Responsive Hydrogels ◽  
Complexation Equilibrium

AbstractNovel graft copolymeric, pH responsive hydrogels have been synthesized by solution polymerization. Poly(methacrylic acid-g-ethylene glycol) hydrogels exhibit reversible complexation as a function of pH because of hydrogen bonding between the PEG grafts and the PMAA main chains. These gels are being developed as pH responsive membranes for use in biomedical applications. ATR-FTIR results indicate that there is hydrogen bonding occurring in membranes swollen under conditions favorable for complexation. Equilibrium swelling studies have shown that the pH of the surrounding environment has a significant effect on the swelling behavior of these membranes. The swelling behavior has also been shown to respond rapidly to changing pH conditions. P(MAA-g-EG) membranes also show pH sensitive permeability toward solutes as a result of this environmentally sensitive swelling.

Preparation of MIP Microspheres by Precipitation Polymerization with 1-Phenyl-1-Propanol as Template

2011 ◽  
Vol 415-417 ◽  
pp. 1225-1230
Author(s):  
Chuan Yi Yao ◽  
Qing Qing Li ◽  
Ying Hua Lu
Keyword(s):  
Methacrylic Acid ◽  
Molecularly Imprinted Polymer ◽  
Precipitation Polymerization ◽  
Polymerization Temperature ◽  
Polymer Microspheres ◽  
Functional Monomer ◽  
Polymerization Time ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Synthesis Conditions

Molecular imprinting polymer microspheres were prepared by precipitation polymerization with methacrylic acid as functional monomer and 1-phenyl-1-propanol as template. The effects of synthesis conditions, including the kind of solvent, polymerization temperature, the concentration of template and initiator, rotational speed and pre-polymerization time, on the characteristics of the molecularly imprinted polymer microspheres were studied. The rebinding experiments showed that the molecularly imprinted polymer microspheres synthesized by precipitation polymerization at 60°C, with acetonitrile as solvent and the concentrations of both template and initiator of 0.01mol L-1, have good specific recognition and higher affinity capacity.

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