Synthesis and characterization of magnetic polyHIPEs with humic acid surface modified magnetic iron oxide nanoparticles

• Published in: Reactive & functional polymers Vol. 73; no. 1; pp. 175 - 181
• Main Authors: Mert, Emine Hilal, Yıldırım, Hüseyin, Üzümcü, Ahmet Talha, Kavas, Hüseyin
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01-01-2013; Elsevier
• Subjects: Adsorbents; Adsorption; Applied sciences; Atomic absorption analysis; Chemistry; Composites; Emulsions; Exact sciences and technology; Fe3O4@HA; Forms of application and semi-finished materials; General and physical chemistry; HIPE; Humic acid; Humic acids; Macroporous polymers; Magnetic polymers; Magnetic properties; Mathematical analysis; Nanoparticles; Polymer industry, paints, wood; Surface chemistry; Surface physical chemistry; Technology of polymers; Fe3O4@HA; Magnetic polymers; Macroporous polymers; Humic acid; HIPE; Iron oxide; Emulsion copolymerization; Adsorption capacity; Metal ion; Specific surface area; Porous material; O; Crosslinked copolymer; Pore size; Magnetite; Magnetic material; Aqueous medium; Coated particle; pH; Nanocomposite; Manufacturing; Adsorbent; Coprecipitation; Magnetic properties; Fe; Benzene(divinyl) copolymer; Liquid solid adsorption; Mercury II; Experimental study; Composite particles; Magnetization curve; Magnetic particles; Morphology; @HA; Kinetics; Radical copolymerization; Styrene copolymer
• ISSN: 1381-5148
• DOI: 10.1016/j.reactfunctpolym.2012.09.005

Magnetic macroporous polymer monoliths have been prepared using styrene/divinylbenzene (S/DVB) high internal phase emulsions (HIPEs) as templates. Humic acid surface modified iron oxide magnetic nanoparticles (Fe3O4@HA) have been used to prepare magnetic emulsion templates. The effect of magnetic particle concentration has been investigated by changing the ratio of Fe3O4@HA nanoparticles in the continuous phase. Highly macroporous polymers with magnetic response were obtained by the removal of the internal phase after the curing of emulsions at 80°C. Fe3O4@HA particles were characterized by XRD and FTIR. The porosity, pore morphology and magnetic properties of the macroporous polymers were characterized as a function of the Fe3O4@HA concentration by scanning electron microscopy (SEM), Brunauer–Emmet–Teller (BET) molecular adsorption method and vibrating sample magnetometry (VSM), respectively. BET and VSM measurements demonstrated that the specific surface area and the saturation magnetization of the polymer monoliths were changed according to the Fe3O4@HA concentration between 8.77–35.08m2g−1 and 0.63–11.79emug−1, respectively. Resulting magnetic monoliths were tested on the adsorption of Hg(II) and atomic absorption spectroscopy (AAS) was used to calculate the adsorption capacities. The maximum adsorption capacity of the magnetic monoliths was calculated to be 20.44mmolg−1 at pH 4.