Magnetic nanoparticle-crosslinked ferrohydrogel as a novel class of forward osmosis draw agent
- 143 Downloads
In this work, we report a facile strategy to synthesize ferrohydrogel containing magnetic nanoparticle as crosslinker and successfully using as draw agent in forward osmosis processes. Herein, a core–shell magnetic nanoparticle was synthesized to use as a crosslinker in hydrogel matrix by coating 3-(trimethoxysilyl) propyl methacrylate (MPS) shell onto Fe3O4@SiO2 nanoparticles. Ferrohydrogel is synthesized by free radical polymerization of acrylic acid (AA) and acrylamide (AAm) as monomers and Fe3O4@SiO2@MPS as crosslinker (MNP-FHg). Conventional crosslinked pure polymer hydrogel (MBA-PHg) and ferrohydrogel (MBA-FHg), using methylene bisacrylamide (MBA) crosslinker, are compared to those obtained by Fe3O4@SiO2@MPS multifunctional crosslinker. The water flux and swelling ratio yielded by MNP-FHg was investigated and compared with MBA-PHg and MBA-FHg under the same operating condition. The results show the high swelling ratio and water flux for MNP-FHg in comparison to other hydrogel samples and confirmed the significant effect of crosslinker on the performance of polymer hydrogel. Furthermore, thanks to the existence of MNPs, this ferrohydrogel can be easily recovered from the diluted draw solution under an external magnetic field.
KeywordsPolymeric magnetic hydrogels Magnetic nanoparticle Forward osmosis Crosslinker Water flux Draw agent
The authors gratefully acknowledge the financial and instrumental supports received from the University of Tehran.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflicts of interest.
- Ali W, Gebert B, Hennecke T, Graf K, Ulbricht M, Gutmann JS (2015) Design of thermally responsive polymeric hydrogels for brackish water desalination: effect of architecture on swelling, deswelling, and salt rejection. ACS Appl Mater Interfaces 7:15696–15706. https://doi.org/10.1021/acsami.5b03878 CrossRefGoogle Scholar
- Barbucci R, Pasqui D, Giani G, de Cagna M, Fini M, Giardino R, Atrei A (2011) A novel strategy for engineering hydrogels with ferromagnetic nanoparticles as crosslinkers of the polymer chains. Potential applications as a targeted drug delivery system. Soft Matter 7:5558. https://doi.org/10.1039/c1sm05174a CrossRefGoogle Scholar
- Lecaros RLG, Syu Z-C, Chiao Y-H, Wickramasinghe SR, Ji YL, An QF, Hung WS, Hu CC, Lee KR, Lai JY (2016) Characterization of a thermoresponsive chitosan derivative as a potential draw solute for forward osmosis. Environ Sci Technol 50:11935–11942. https://doi.org/10.1021/acs.est.6b02102 CrossRefGoogle Scholar
- Salehi TM, Peyravi M, Jahanshahi M, Lau WJ, Rad AS (2018) Impacts of zeolite nanoparticles on substrate properties of thin film nanocomposite membranes for engineered osmosis. J Nanopart Res 20. https://doi.org/10.1007/s11051-018-4154-1
- Ta TKH, Trinh MT, Long NV, Nguyen TTM, Nguyen TLT, Thuoc TL, Phan BT, Mott D, Maenosono S, Tran-van H, le VH (2016) Synthesis and surface functionalization of Fe3O4-SiO2core-shell nanoparticles with 3-glycidoxypropyltrimethoxysilane and 1,1′-carbonyldiimidazole for bio-applications. Colloids Surf A Physicochem Eng Asp 504:376–383. https://doi.org/10.1016/j.colsurfa.2016.05.008 CrossRefGoogle Scholar
- Zhang Y-X, Yu X-Y, Jin Z, Jia Y, Xu WH, Luo T, Zhu BJ, Liu JH, Huang XJ (2011) Ultra high adsorption capacity of fried egg jellyfish-like γ-AlOOH(Boehmite)@SiO2/Fe3O4 porous magnetic microspheres for aqueous Pb(II) removal. J Mater Chem 21:16550. https://doi.org/10.1039/c1jm12196k CrossRefGoogle Scholar