Preparation, Characterization, and swelling study of N,N’-dimethylacrylamide/acrylic acid amphiphilic hydrogels in different conditions

This research was an attempt to synthesize a series of amphiphilic hydrogels based on different molar ratios of N,N-dimethylacrylamide (DMAM) and acrylic acid (AA) and investigated the influence of pH, time, temperature, and salinity of water on the swelling behavior of the hydrogels. The swelling k...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2022-07, Vol.79 (7), p.5183-5195
Main Authors: Jozaghkar, Mohammad Reza, Sepehrian Azar, Amir, Ziaee, Farshid
Format: Article
Language:English
Subjects:
Acids
Acrylic acid
Aqueous solutions
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Crosslinking
Diffusion
Distilled water
Equilibrium
Fourier transforms
Hydrogels
Methylene bisacrylamide
Oil recovery
Organic Chemistry
Original Paper
Phase transitions
Physical Chemistry
Polyethylene glycol
Polymer Sciences
Salinity
Soft and Granular Matter
Spectrum analysis
Swelling ratio
Temperature
Water absorption
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Summary:This research was an attempt to synthesize a series of amphiphilic hydrogels based on different molar ratios of N,N-dimethylacrylamide (DMAM) and acrylic acid (AA) and investigated the influence of pH, time, temperature, and salinity of water on the swelling behavior of the hydrogels. The swelling kinetic parameters and swelling diffusion were also determined. The synthesis of DMAM/AA hydrogel using N,N'-methylenebisacrylamide as a cross-linking agent and AIBN as initiator was confirmed by Fourier transform infrared spectroscopy (FTIR). The swelling results revealed that the hydrogel swelling reduced as a content of AA. Also, it was demonstrated that increasing the pH caused a drastic increment of the equilibrium swelling ratio and the maximum extent (5150%) was reached at pH 14 for sample AHD3 containing 25% AA. The swelling mechanism study showed that for all samples, Fickian diffusion was responsible for water transport as well as the swelling process was considerably influenced by the chemical structure of the monomer repeating units in the synthesized samples. The swelling study of the hydrogel in the aqueous solution of NaCl and Na 2 SO 4 showed that increasing the salt concentration caused in limitation of water absorption. Also, the swelling degree in the aqueous solution of Na 2 So 4 was slightly higher than NaCl. It was also shown that the increase in temperature of the swelling process led to enhancement of swelling ratio in distilled water. Graphic abstract
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-021-03760-4