Abstract
Novel polyetheramine-based hydrogels have been synthesized by reacting difunctional Jeffamine of varying molecular weights (ED600, ED900 and ED2003) with glutaraldehyde (GA) in the presence of trifunctional Jeffamine (T403) as a crosslinker. The prepared hydrogels were characterized by Fourier Transform Infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) techniques. Network properties of the hydrogels were evaluated via swelling investigations. Higher molecular weight of Jeffamine generated hydrogel networks with lower crosslink densities, consequently higher swelling abilities. The crosslink density of the hydrogels increased with increasing GA amount. The prepared hydrogels demonstrated to be pH and temperature responsive depicting decrease in swelling ratios with increasing pH and temperature. The obtained swelling results indicated that the swelling behavior of the hydrogels agreed with the Flory–Rehner equation.
Graphical abstract
Novel polyetheramine crosslinked based water-insoluble hydrogels having imine functional groups in their network structures were prepared via polymerization of difunctional Jeffamine monomers. Investigated influence of different Jeffamine molecular weight synthesized hydrogels depicted suitable swelling, pH and temperature responsive properties.
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Abbreviations
- JED:
-
Jeffamine ED series
- DCE:
-
Dichloro ethane
- PEG:
-
Polyethylene glycol
- POE:
-
Polyoxyethylene
- POP:
-
Polyoxypropylene
- THF:
-
Tetrahydrofuran
- f GA :
-
Mole fraction of glutaraldehyde in the gel
- f JED :
-
Mole fraction of Jeffamine ED in the gel
- f JT :
-
Mole fraction of Jeffamine T403 in the gel
- ∆H endo :
-
Endothermic enthalpy
- ΔH w :
-
Heat of fusion of pure water
- M c :
-
Average molecular weight between two successive crosslinks
- M d :
-
Weights of dry hydrogel after leaching
- M GA :
-
Molecular mass of glutaraldehyde
- M JT :
-
Molecular mass of Jeffamine T403
- M JED :
-
Molecular mass of Jeffamine ED series
- M p :
-
Weights of the hydrogels after preparation
- M s :
-
Weights of hydrogel after swelling
- M o :
-
Molar mass of repeating units
- q v :
-
Equilibrium swelling ratio
- pH pzc :
-
pH point zero charge
- V 1 :
-
Molar volume of solvent
- V 2m :
-
Volume fraction of polymer network in swollen state
- V 2r :
-
Volume fraction of polymer network in relaxed state
- V 2s :
-
Volume fraction of solvent
- V r :
-
Average molar volume of polymer repeating units
- χ :
-
Polymer solvent interaction parameter
- W f :
-
Fraction of the freezing water
- W nf :
-
Fraction of non-freezing bound water
- W ∞ :
-
Equilibrium water content of the hydrogel
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Acknowledgments
The authors Ahmet Erdem and Asabuwa N. Fahanwi wish to thank the TUBITAK for 2211-D and 2215 fellowship programs and Kocaeli University for the financial support (BAP-2011/60) provided in completing this work. Also great thanks to Physics Department research laboratory for TGA and DSC measurements. Thanks goes to Hunstman for providing the Jeffamine samples used in this research work.
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Erdem, A., Ngwabebhoh, F.A. & Yildiz, U. Synthesis, characterization and swelling investigations of novel polyetheramine-based hydrogels. Polym. Bull. 74, 873–893 (2017). https://doi.org/10.1007/s00289-016-1751-y
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DOI: https://doi.org/10.1007/s00289-016-1751-y