Hatice BODUGOZ-SENTURK, Olgun GÜVEN

Suspensiyon polimerizasyonu ile gözenekli ve gözeneksiz poli iso-bütil metakrilat mikrokürelerinin hazırlanması

D eniz suyundan hafif petrol türevlerinin uzaklaştırılması amacıyla suspensiyon polimerizasyonu tekniği ile sulu ortamda gözenekli ve gözeneksiz poli izo-butilmetakrilat PiBMA , mikro küreleri hazırlanmıştır. Çapraz bağlayıcı, gözenek yapıcı ve reaksiyon parametrelerinin, mikro kürelerin sıvı tutma kabiliyetlerine, gözenek yapısına ve ağ yapısına olan etkileri incelenmiştir. Benzin ve küçük hidrokarbonlar pentan, hekzan ve heptan model çözücüler olarak kullanılmıştır. Mikrokürelerin çözücü içinde şişme davranışı ve ağ yapı özellikleri, çapraz bağlanma yoğunluğuna, çapraz bağlayıcı türüne, gözenek yapısına ve çözücü türüne bağlı olduğu tespit edilmiştir. Hem gözenekli hem gözeneksiz kürelerde en yüksek sıvı tutma kapasitesi benzinde gözlenmiştir. Genel olarak PiBMA mikroküreleri deniz suyundan hafif petrol türevlerinin uzaklaştırılmasında etkili oldukları ve birden fazla kullanım sırasında hem kapasitelerini hem de şekillerini yitirmedikleri gözlenmiştir

Anahtar Kelimeler:

Mikrokureler, gamma radyasyonu, poli izo-butil metakrilat, suspensiyon polimerizasyonu

Preparation of porous and non-porous poly iso-butyl methacrylate microspheres by suspension polymerization

Porous and non-porous Poly isobutyl methacrylate PiBMA microspheres were synthesized by suspension polymerization technique in aqueous medium to remove light petroleum derivatives from sea water. Influ- ence of the crosslinking agent, porogen and reaction parameters on the solvent uptake, porosity and networks structure of the PiBMA spheres were investigated. Gasoline and small aliphatic hydrocarbons pentane, he- xane and heptane were used as model solvents. Swelling behavior and network properties were found to be dependent on the crosslinking density of the sphere, crosslinking agent, porosity and solvent. Highest solvent uptake for both porous and non-porous PiBMA spheres was observed in gasoline. PiBMA microsphere shown to be good candidates for the removal of light petroleum derivatives and they preserved their uptake capacity and shape over several usages.

Keywords:

Microspheres, gamma radiation, poly isobutyl methacrylate, suspension polymerization,

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1. J. Cejkova, F. Stepanek, Compartmentalized and internally structured particles for drug delivery - a review. Current Pharm. Design, 19 (2013) 6298.
2. M. Paulis, J.R. Leiza, Polymer/clay nanocomposites through emulsion and suspension polymerization. Advances in Polymer Nanocomposite Technology, ed. V. Mittal. (2010) 53-100.
3. D.R. Kryscio, Peppas, Critical review and perspective of macromolecularly imprinted polymers. Acta Biomater., 8 (2012) 461.
4. D.L. Elbert, Liquid-liquid two-phase systems for the production of porous hydrogels and hydrogel microspheres for biomedical applications: A tutorial review. Acta Biomater., 7 (2011) 31.
5. B.N. Kolarz, Reactive multiacrylic copolymers prepared by suspension polymerization. Polimery, 44 (1999) 637.
6. A. Nasser, U. Mingelgrin, Mechanochemistry: A review of surface reactions and environmental applications. Appl. Clay Sci., 67-68 (2012) 141.
7. T. Caykara, S.S. Alaslan, M. Gürü, H. Bodugoz, O. Güven. Preparation and characterization of poly(isobutyl methacrylate) microbeads with grafted amidoxime groups. Radiat. Phys. Chem., 76 (2007) 1569.
8. H. Bodugoz, O. Guven, The synthesis of nonporous poly(isobutyl methacrylate) microspheres by suspension polymerization technique and investigation of their swelling properties. J. Appl. Polym. Sci., 83 (2002) 349.
9. M.J. Zohuriaan-Mehr, K. Kabiri, Superabsorbent polymer materials: A review. Iranian Polym. J., 17 (2008) 451.
10. G.H. Ma, Control of heterogeneous structure of porous polymer microspheres prepared from polymerization system and preformed polymer system. Colloid Polym. Sci., 291 (2013) 53.
11. P.J. Dowding, B. Vincent, Suspension polymerisation to form polymer beads. Colloid Surf. A-Physicochem. Eng. Aspect., 161 (2000)259.
12. F. Askari, S. Nafisi, H. Omidian, S. A. Hashemi. Synthesis and characterization of acrylic-based superabsorbents. J. Appl. Polym. Sci., 50 (1993) 1851.
13. B.W. Brooks, Suspension polymerization processes. Chem. Eng. Technol., 33 (2010) 1737.
14. J. Brandrup, E.H. Immergut, Polymer Handbook,. Vol. Third ed.; 1989, New York: Wiley. VII/517, V/126.
15. N.A. Peppas, P. Colombo, Analysis of drug release behavior from swellable polymer carriers using the dimensionality index. J. Control. Release, 45 (1997) 35.
16. S. Bryant, G. Mason, D. Mellor, Quantification of spatial correlation in porous media and its effect on mercury porosimetry. J. Colloid Interface Sci., 177 (1996) 88.