Journal of Institute of Convergence Technology (융복합기술연구소 논문집)

Institute of Convergence Technology (한국교통대학교 융복합기술연구소)
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Application of Suspension-Polymerized Spherical PAN beads as a Precursor of Spherical Activated Carbon

현탁중합으로 합성된 구형 PAN 수지의 구형 활성탄의 전구체로서의 활용

  • Hyewon, Yeom (Department of Polymer Science and Engineering, Korea National University of Transportation) ;
  • Hongkyeong, Kim (Department of Polymer Science and Engineering, Korea National University of Transportation)
  • 염혜원 (한국교통대학교 나노화학소재공학전공) ;
  • 김홍경 (한국교통대학교 나노화학소재공학전공)
  • Received : 2022.11.01
  • Accepted : 2022.11.17
  • Published : 2022.11.30
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Abstract

Polyacrylonitrile was synthesized through suspension polymerization and then sieved to obtain spherical beads with a size of 200~510 ㎛. PAN was copolymerized with 2 mol% MMA monomer which is known to promote cyclization and crosslinking of nitrile group. The resonance cyclization reaction of the nitrile group in the synthesized PAN beads was observed near 170℃ with thermal analysis and FT-IR. The reaction conversion of the nitrile group in spherical beads was 23% during heat treatment, which was lower than that of the well-oriented PAN fiber used as a precursor of carbon fiber. This is because the stereo-regularity of molecular chains in the form of a random coil (spherical bead) is much lower than that of PAN fiber. It was confirmed that the compressive strength of the spherical PAN bead was greatly improved through the resonance cyclization and shrinkage according to the heat treatment, and it was also observed that the pores in PAN beads were formed after the heat treatment.

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Acknowledgement

이 논문은 2022년 한국교통대학교 지원을 받아 수행하였음

References

  1. D. Han and H. Kim, "Crosslinking Density Control and Its Carbonization Characteristics of Spherical Phenolic Resin Particles by Using Cresol as Comonomer", Korean Chemical Engineering Research, 58 (4), p618, 2020.
  2. D. Han, D. Kim, and H. Kim, "Synthesis of ResoleType Phenolic Beads via Suspension Polymerization Technique", Korean Chemical Engineering Research, 51 (2), p279, 2013.
  3. D. Han, and H. Kim, "SThe Effect of Reactant Composition on the Synthesis of Resole-Type Phenolic Bead", Korean Chemical Engineering Research, 52 (1), p63, 2014.
  4. K. P. Lok and C. K. Ober, "Particle size control in dispersion polymerization of polystyrene", Canadian Journal of Chemistry, 63, p209, 1985.
  5. P. Hodge and D. C. Sherrington, Eds., "Polymer supported reactions in organic synthesis", John Wiley & Sons, Chichester, 1980.
  6. D. C. Sherrington and P. Hodge, Eds., "Syntheses and Separations using Functional Polymers", John Wiley & Sons, Chichester, 1988.
  7. N. K. Mathur, C. K. Narang, and R. E. Williams, "Polymers as Aids in Organic Chemistry", Academic Press, New York, 1980.
  8. Y. Kim, S. Lim, J. Kim, D. Lee, and J. Ahn, "Synthesis of Hydroxylated Macroporous Polymer Beads for Microwave-Assisted Desorption of Nonpolar Volatile Organic Compounds", Bull. Korean Chem. Soc. 31 (8), p2395, 2010.
  9. S. Park, D. Kim, J. Byeon, J. Lyu, and D. Kim, "Styrene-Butylacrylate Based Suspension Polymerized Toner Prepared Using PVA as a Suspending Agent", Korean Chem. Eng. Res., 48 (2), p212, 2010.
  10. H. Kang, H. Lee, K. Kim, D. Ahn, S. Baek, S. Lee, and H. Jeong, "Effect of Solvent on Pore Characteristics of Styrene-Divinylbenzene Copolymer", Polymer(Korea), 23 (3), p348, 1999.
  11. J. S. Fruchtel and G. Jung, "Organic Chemistry on Solid Supports", Angew. Chem., 35 (1), P17, 1996.
  12. Y. K. Takahara, S. Ikeda, K. Tachi, T. Sakata, T. Hasegawa, H. Mori, M. Matsumura, and B. Ohtani, "Porous polystyrene microspheres having dimpled surface structures prepared within micellar assemblies of amphiphilic silica particles in water", Chem. Commun., 33, p4205, 2005.
  13. H. J. Lee, J. S. Won, S. C. Lim, T. S. Lee, J. Y. Yoon, and S. G. Lee, "Preparation and Characterization of PAN-based Carbon Fiber with Carbonization Temperature", Textile Sci. Eng., 53, p103, 2016.
  14. H. Ju, M. Han, K. Song, C. Jeon, H. Jeong, M. J. Kim, and H. G. Chae, "Polyacrylonitrile based Copolymer Synthesis and Precursor Fiber Spinning for Manufacturing High-performance Carbon Fiber", Comp. Res., 35 (2), p115, 2022.
  15. S. Y. Ji, Y. G. Jeong, and W. H. Park, "Structural and Morphological Changes of Electrospun Polyacrylonitrile (PAN) Nanofibers according to Heat Treatment Conditions", Textile Sci. Eng., 53, p285, 2016.
  16. J. Kim and B.-C. Ku, "A Review of Flame Retarding Polyacrylonitrile (PAN) Fibers and Composites", Comp. Res., 32 (6), p342, 2019.
  17. Y. J. Choi, Y.-S. Lee, and J. S. Im, "Effect of Pore Structure of Activated Carbon Fiber on Mechanical Properties", Appl. Chem. Eng., 29 (3), p318, 2018.