Abstract
In this study, hydrophobic modified poly(acrylamide/octadecyl acrylate) (poly(AAm/C18)) and poly(acrylamide/octadecyl acrylate)-carboxymethyl cellulose (poly(AAm/C18)-CMC) hydrogels with high mechanical strength and shape memory properties were synthesized by random copolymerization method. Hydrogel synthesis was successfully carried out in one step on the basis of the hydrophobic monomer units carrying alkyl side chains included in the hydrophilic polymer network, and these hydrophobes clustered in water and acted as crosslinks. Hydrogels were characterized by Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), Differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The results showed that with the increase of the amount of hydrophobic monomer (C18) in the hydrogels, the crystal regions in the hydrogel structure increased. The swelling behaviour of the hydrogels was investigated as a function of the hydrophobic monomer content. Experimental swelling data confirmed the DSC and XRD results. The shape memory properties of hydrogels containing CMC were investigated. The new shape of the hydrogels was fixed by complexation between CMC and metal (M2+ and M3+ valence) ions.
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Acknowledgements
The first author thanks to the second author who lost her life on 6th February, 2023 because of the earthquake occurred in Turkey for being the best friend, scientist, beloved wife and mother. She will be remembered forever in our hearts. The authors are thankful to the Scientific Research Projects Coordination Unit of Hatay Mustafa Kemal University [Project Number: 20.M.057] for their financial support.
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Scientific Research Projects Coordination Unit of Hatay Mustafa Kemal University [Project number: 20.M.057]. Hatay Mustafa Kemal University, 20.M.057, 20.M.057
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Olukman Şahin, M., Demirbilek Bucak, C. Hydrophobically Associated Poly(acrylamide/octadecyl acrylate)-Carboxymethyl Cellulose Hydrogels: Synthesis, Characterization, and Shape Memory Ability. J Polym Environ 31, 3650–3663 (2023). https://doi.org/10.1007/s10924-023-02807-z
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DOI: https://doi.org/10.1007/s10924-023-02807-z