Synthesis and characterization of poly(styrene-block-acrylic acid) diblock copolymer modified magnetite nanocomposite for efficient removal of penicillin G. (1st February 2020)

• Record Type: Journal Article
• Authors: Ghamkhari, Aliyeh; Mohamadi, Leili; Kazemzadeh, Sahar; Zafar, Muhammad Nadeem; Rahdar, Abbas; Khaksefidi, Razieh
• Is Part Of: Composites. Number 182(2020)
• Publication Date: 2020-02-01
• Subjects: Penicillin G -- Poly(styrene-block-acrylic acid) diblock copolymer -- Adsorption -- Magnetic nanocomposite -- Response surface methodology; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2019.107643
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: A versatile synthesis of pH-responsive poly(styrene-block-acrylic acid) (poly(St- b -AA)) diblock copolymer modified Fe3 O4 magnetite nanocomposite (poly(St- b -AA)@Fe3 O4 ) was performed for pharmaceutical removal application. For this purpose, the diblock copolymer poly(St- b -AA) was synthesized via reversible addition of fragmentation chain transfer (RAFT) polymerization technique. This synthesized copolymer with –COOH groups were adsorbed onto the surface of Fe3 O4 to produce poly(St- b -AA)@Fe3 O4 nanocomposite, which was then used as adsorbent to remove penicillin G. The synthesis of polystyrene homopolymer poly(St) (macro-RAFT agent) and poly(St- b -AA) diblock copolymer was confirmed by fourier transform infrared (FTIR) and 1 H nuclear magnetic resonance ( 1 HNMR). The poly(St- b -AA)@Fe3 O4 nanocomposite was characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), thermogravimetry analysis (TGA), FTIR and dynamic light scattering (DLS) analysis. After that the poly(St- b -AA)@Fe3 O4 was applied to remove penicillin G (an antibiotic) from aqueous solution. The findings indicate that the optimal conditions for maximum penicillin G removal were pH 11, initial penicillin concentration 50 mg/L, poly(St- b -AA)@Fe3 O4 dose 0.5 g/L and contact time 50 min. Under such conditions, the extent of penicillin G removal was 99.99%. Based on the obtained results, it is found that the poly(St- b -AA)@Fe3 O4 adsorbent can be used as an effective adsorbent for removing penicillin G from aqueous solutions. Graphical abstract: Image 1 Highlights: Versatile synthesis of poly(St- b -AA)@Fe3 O4 magnetite nanocomposite. Evaluation of poly(St- b -AA)@Fe3 O4 nanocomposite for their potential application as adsorbent. Removal of penicillin G by novelty poly(St- b -AA)@Fe3 O4 adsorbent. Study of factors affecting the adsorption of penicillin G by poly(St- b -AA)@Fe3 O4 . Penicillin G removal by poly(St- b -AA)@Fe3 O4 was over 98% at optimal conditions.