Effect of PAA-coated magnetic nanoparticles on the performance of PVA-based hydrogels developed to be used as environmental remediation devices
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In the present work, the effect of the incorporation of polyacrylic acid (PAA)–coated magnetic nanoparticles (MNPs) on the performance of polyvinyl alcohol (PVA)–based hydrogels for water remediation was studied. Ferrogels from PVA and PAA-coated MNPs were prepared through the ecocompatible freezing–thawing physical cross-linking method, and then they were completely characterized. Two different lab-made PAA-coated iron oxide MNPs, characterized in a previous work, were prepared by coprecipitation method from two different low PAA molecular weights, Mw 1800 g/mol and 5000 g/mol. The effect of MNP content and the PAA Mw on ferrogel final properties was determined. In addition, adsorption of methylene blue (MB) and cadmium (Cd+2) was carried out to analyze the possible application of the developed materials as environmental remediation devices. The capture of a ferrogel by an external field occurs due to the force that the field gradient exerts on single magnetic particles, which is then transferred onto the polymer matrix. This force was measured as a function of the distance to a permanent magnet, and the condition to magnetically recover the sample was established. The results obtained demonstrated that the ferrogels presented in this work are able to adsorb heavy metals and then be magnetically separated.
KeywordsMagnetic hydrogel Ferrogel Iron oxide nanoparticles Nanocomposite Polyvinyl alcohol Polyacrylic acid Environmental remediation
The authors acknowledge the collaborations made by Dra. Romina P. Ollier and Dra. M. Fernanda Horst.
This study received funding from CONICET (PIP00617), Universidad Nacional de Mar del Plata, Universidad Nacional de La Plata (X807), ANPCyT (PICT 2014-3228 and PICT 2016-1905) and Fundación Bunge & Born.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Bonhome Espinosa AB (2017) Hidrogeles magnéticos para aplicaciones biomédicas. Estudio de su biocompatibilidad y propiedades viscoelásticas Universidad de Granada (España)Google Scholar
- Goiti E, Salinas MM, Arias G, Puglia D, Kenny JM, Mijangos C (2007) Effect of magnetic nanoparticles on the thermal properties of some hydrogels. Polym Degrad Stab 92:2198–2205. https://doi.org/10.1016/j.polymdegradstab.2007.02.025 CrossRefGoogle Scholar
- Kim JI, Chun C, Kim B, Hong JM, Cho JK, Lee SH, Song SC (2012) Thermosensitive/magnetic poly(organophosphazene) hydrogel as a long-term magnetic resonance contrast platform. Biomaterials 33:218–224. https://doi.org/10.1016/j.biomaterials.2011.09.033 CrossRefGoogle Scholar
- Majid S, Bukhari H, Khan S et al (2015) Synthesis and characterization of chemically cross-linked acrylic acid / gelatin hydrogels : effect of pH and composition on swelling and drug release. Int J Polym Sci 15Google Scholar
- Ray D, Mohanta GP, Gils PS et al (2009) Delivery of antihypertensive drug through synthesized hydrogel network, a comparative study. Lat Am J Pharm 28:747–755Google Scholar
- Sanchez LM, Alvarez VA, Gonzalez JS (2016) Ferrogels: smart materials for biomedical and remediation applications. In: Handbook of composites from renewable materials, volume 8: nanocomposites: advanced applications. pp 400–430Google Scholar
- Sanchez LM, Alvarez VA, Gonzalez JS (2017) 21. Ferrogels : smart materials for biomedical and remediation applications. In: Handbook of composites from renewable materialsGoogle Scholar
- Sinha Ray S, Okamoto M (2003) Polymer/layered silicate nanocomposites: a review from preparation to processing. Prog Polym Sci 28:1539–1641. https://doi.org/10.1016/j.progpolymsci.2003.08.002 CrossRefGoogle Scholar