Thermal and Electrical Properties of PS/MWCNT Composite Prepared by Solution Mixing: Effect of Surface Modification of MWCNT

Solution Mixing법에 의한 PS/MWCNT 복합재료의 열 및 전기전도 특성: MWCNT 표면 개질의 영향

  • Park, Eun-Ju (Department of Chemical Engineering, Inha University) ;
  • Lee, Jeong-Woo (Department of Chemical Engineering, Inha University) ;
  • Jung, Dong-Soo (Department of Mechanical Engineering, Inha University) ;
  • Shim, Sang-Eun (Department of Mechanical Engineering, Inha University)
  • Received : 2010.01.08
  • Accepted : 2010.01.19
  • Published : 2010.03.30


Herein, the effect of the dispersion uniformity of the multi-wall carbon nanotube (MWCNT) on the thermal and electrical conductivity of polystyrene (PS)/MWCNT composite was investigated. The PS/MWCNT composites were prepared by solution mixing from dispersions of various MWCNTs in PS/tetrahydrofuran (THF) solution. Three types of MWCNTs were used; pristine MWCNT, hydroxyl functionalized MWCNT, which was functionalized with $KMnO_4$ in the presence of a phase transfer catalyst at room temperature, and pristine MWCNT with BYK-9077 as a dispersant. It was found that the stable dispersion state of MWCNT in PS/THF solutions significantly improved the thermal and electrical conductivity of the ultimate composites. It is noted that the thermal and electrical conductivity of PS/3 wt% pristine MWCNT composite with BYK-9077 were about 9.4 and 30~50% higher than those of PS/3 wt% pristine MWCNT composite, respectively.


Supported by : Korea Science and Engineering Foundation


  1. M. Moniruzzaman and K.I. Winey, "Polymer nanocomposites containing carbon nanotubes", Macromolecules, 39, 5194 (2006).
  2. P. Chen, H.S. Kim, and H.J. Jin, "Preparation, properties and application of polyamide/carbon nanotube nanocomposites", Macromol. Res., 17, 207 (2009).
  3. D.S. Bang, H.S. Kye, U.R. Cho, B.G. Min, and K.C. Shin, "Elastomer nanocomposites(I)", Elastom. Compos., 44, 22 (2009).
  4. H.T. Ham, C.M. Koo, S.O. Kim, Y.S. Choi, and I.J. Chung, "Influence of oxyfluorination on physicochemical characteristics of carbon fibers and their reinforced epoxy composites", Macromol. Res., 12, 384 (2004).
  5. E.T. Thostenson, C. Li, and T.W. Chou, "Nanocomposites in context", Compos. Sci. Technol., 65, 491 (2005).
  6. H.S. Kim, B.H. Park, J.S. Yoon, and H.J. Jin, "Nylon 610/functionalized multiwalled carbon nanotubes composites by in situ interfacial polymerization", Mater. Lett., 61, 2251 (2007).
  7. N. Zhang, J. Xie, and V.K. Varadan, "Functionalization of carbon nanotubes by potassium permanganate assisted with phase transfer catalyst", Smart Mater. Struct., 11, 962 (2002).
  8. L. Vaisman, H.D. Wagner, and G. Marom, "The role of surfactants in dispersion of carbon nanotubes", Adv. Colloid Interf. Sci., 128, 37 (2006).
  9. J. Lee, M. Kim, C.K. Hong, and S.E. Shim, "Measurement of the dispersion stability of pristine and surface-modified multiwalled carbon nanotubes in various nonpolar and polar solvents", Meas. Sci. Technol., 18, 3707 (2007).
  10. M.W. Marshall, S. Popa-Nita, and J.G. Shapter, "Measurement of functionalised carbon nanotube carboxylic acid groups using a simple chemical process", Carbon, 44, 1137 (2006).
  11. S. Hong, M. Kim, C.K. Hong, D. Jung, and S.E. Shim, "Encapsulation of multi-walled carbon nanotubes by poly(4- vinylpyridine) and its dispersion stability in various solvent media", Synthetic Met., 158, 900 (2008).
  12. M. Kim, C.K. Hong, S. Choe, and S.E. Shim, "Synthesis of polystyrene brush on multiwalled carbon nanotubes treated with $KMnO_4$ in the presence of a phase-transfer catalyst", J. Polym. Sci. Part A: Polym. Chem., 45, 4413 (2007).
  13. Y. Sasson and R. Neumann, Handbook of phase transfer catalysis, Chapman & Hall, London, UK (1997).
  14. D.G. Lee and V.S. Chang, "Polyethylene glycol as a phase transfer catalyst for aryldiazonium salt reactions", J. Org. Chem., 43, 1532 (1978).
  15. G. Wang, Z. Qu, L. Liu, Q. Shi, and J. Guo, "Study of SMA graft modified MWNT/PVC composite materials", Mater. Sci. Eng. A, 472, 136 (2008).
  16. H. Meng, G.X. Sui, P.F. Fang, and R. Yang, "Effects of acidand diamine-modified MWNTs on the mechanical properties and crystallization behavior of polyamide 6", Polymer, 49, 610 (2008).
  17. M. Monthioux, B.W. Smith, B. Burteaux, A. Claye, J.E. Fischer, and D.E. Luzzi, "Sensitivity of single-wall carbon nanotubes to chemical processing: an electron microscopy investigation", Carbon, 39, 1251 (2001).
  18. F.H. Ko, C.Y. Lee, C.J. Ko, and T.C. Chu, "Purification of multi-walled carbon nanotubes through microwave heating of nitric acid in a closed vessel", Carbon, 43, 727 (2005).
  19. Y. Li, Y. Liu, Y. Zuo, W. Chi, B. Liu, and Z. Shen, "Effects of dispersants on dispersion of carbon nanotubes and properties of fluorocarbon resin nanocomposites", J. Mater. Sci., 43, 3738 (2008).
  20. J.P. Smalla, L. Shib, and P. Kim, "Mesoscopic thermal and thermoelectric measurements of individual carbon nanotubes", Solid State. Commun., 127, 181 (2003)
  21. S.T. Huxtable, D.G. Cahill, S. Shenogin, L.P. Xue, R. Ozisik, P. Barone, M. Usrey, M.S. Strano, G. Siddons, M. Shim, and P. Keblinski, "Interfacial heat flow in carbon nanotube suspensions", Nat. Mater., 2, 731 (2003).
  22. J. Brandrup, E.H. Immergut, E.A. Grulke, and D.R. Bloch, Polymer handbook, Wiley, New York (1999).