Swelling Behavior of Polyacrylamide Hydrogels near Phase Transition - Materials Sciences and Applications

MSA > Vol.5 No.8, June 2014

Materials Sciences and Applications

Volume 5, Issue 8 (June 2014)

ISSN Print: 2153-117X ISSN Online: 2153-1188

Google-based Impact Factor: 1.34 Citations

Swelling Behavior of Polyacrylamide Hydrogels near Phase Transition ()

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Download as PDF (Size: 1307KB) PP. 610-616

DOI: 10.4236/msa.2014.58063 8,680 Downloads 9,947 Views Citations

Author(s)

R. R. Janot Pacheco, M. E. S. R. Silva, R. G. Sousa, R. F. S. Freitas

Affiliation(s)

Chemical Engineering Department, Engineering School, Federal University of Minas Gerais, Belo Horizonte, Brazil.

ABSTRACT

Hydrogels based on acrylamide (AA) and sodium methacrylate (NMA) as ionic monomer were prepared by solution polymerization using N,N’-methylenebis(acrylamide) (MBA) or ethylene glycol dimethacrylate (EGMA) as crosslinkers and Ammonium Persulfate (APS) and N,N,N’,N’-Te-tramethyl-ethylenediamine (TMEDA) as initiators. Swelling behavior was greatly affected by NMA content near phase transition. Increasing ionic monomer concentration compared to total monomer one led to high expansion in water, oscillating around 285 g/g for MBA and 325 g/g for EGMA crosslinker, above 20% of NMA. Dynamic Light Scattering experiments were performed and, for both crosslinkers, the dynamic correlation length (ξ) decreased with increasing NMA content, contributing to diminish hydrogels spatial inhomogeneities.

KEYWORDS

Polyacrylamide Hydrogels, Phase Transition, Swelling Behavior, Dynamic Correlation Length

Share and Cite:

Pacheco, R. , Silva, M. , Sousa, R. and Freitas, R. (2014) Swelling Behavior of Polyacrylamide Hydrogels near Phase Transition. Materials Sciences and Applications, 5, 610-616. doi: 10.4236/msa.2014.58063.

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[3]	Synthesis of Poly(AAm-co-AA) and Investigation of its Swelling Behavior: Using Response Surface Methodology (RSM)
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[4]	Optimization of Swelling Percentage of Poly (AAm-co-AA) in BaCl2 Salt Solution Using Response Surface Methodology (RSM)
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[5]	Synthesis of an efficient copolymer of acrylamide and acrylic acid and determination of its swelling behavior
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