Effect of acid-treated carbon nanotube and amine-terminated polydimethylsiloxane on the rheological properties of polydimethylsiloxane/carbon nanotube composite system

Taehyung Kim; Hyungsu Kim

Korea-Australia Rheology Journal, Vol.22, No.3, 205-210, September, 2010

Taehyung Kim, and Hyungsu Kim^†

Department of Chemical Engineering, Dankook University, Jukjeon-Dong, Yongin-City, Kyungki-Do, Korea

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In this study, composite systems of multi-walled carbon nanotube (MWNT) and polydimethylsiloxane (PDMS) were prepared by employing acid-treated MWNT (A-MWNT) and amine-terminated PDMS (ATPDMS). A major focus was to investigate the effect of interfacial interactions between acid groups of MWNT and amine groups of PDMS on the rheological properties of the composite systems. It was found that the increase in shear viscosity and dynamic moduli was more pronounced in composite systems containing the pristine MWNT rather than in A-MWNT when the MWNT loading was increased from 0.1 to 0.5 wt.%. However, a synergistic raise of the rheological properties was accomplished by a proper combination of pristine MWNT and A-MWNT at 0.5 wt.% loading. Shear sensitivity of the viscosities was also influenced by the composition of MWNT and the transition from liquid-like to solid-like behavior was discussed in the context of variations occurred in terminal slopes of dynamic moduli of the PDMS/MWNT composite systems.

Keywords:polydimethylsiloxane;acid-functionalization of carbon nanotube;nanocomposite;rheological property

[References]

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Kashiwagi T, Grulke E, Hilding L, Harris R, Awad W, Douglas J, Macromol. Rapid Comm., 33, 761 (2002)
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[2] Ahir SV, Huang YY, Terentjev EM, Polymer, 49(18), 3841 (2008)

[3] Biercuk MJ, Llaguno MC, Radosvljevic M, Hyun JK, Johnson AT, Fisher JE, Appl. Phys. Lett., 80, 2767 (2002)

[4] Breur O, Sundararaj U, Polym. Comp., 25, 630 (2004)

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[8] Hirsch A, Vostrowsky O, Top. Curr. Chem., 245, 193 (2005)

[9] Hong J, Lee J, Hong CK, Shim SE, Current Applied Physics, 10, 359 (2010)

[10] Hu H, Bhowmik P, Zhao B, Hamon MA, Itkis ME, Haddon RC, Chem. Phys. Lett., 345(1-2), 25 (2001)

[11] Huang YY, Ahir SV, Terentjev EM, Phys. Rev. B, 73, 125422 (2006)

[12] Kashiwagi T, Grulke E, Hilding L, Harris R, Awad W, Douglas J, Macromol. Rapid Comm., 33, 761 (2002)

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