Nanocompósitos de poliuretana termoplástica e nanotubos de carbono de paredes múltiplas para dissipação eletrostática

Química Nova

Rodrigo L. Lavall¹  Juliana A. De Sales¹  Raquel S. Borges¹  Hallen D. R. Calado¹  José C. Machado¹  Dario Windmöller¹  Glaura G. Silva¹  Rodrigo G. Lacerda²  Luiz O. Ladeira² 

[1] ,Universidade Federal de Minas Gerais Instituto de Ciências Exatas Departamento de QuímicaBelo Horizonte MG ,Brasil

关键词: thermoplastic polyurethane;    carbon nanotube;    nanocomposites;   

DOI  :  10.1590/S0100-40422010000100025

来源: SciELO

【 摘 要 】

Polyurethane/multi-walled carbon nanotube (MWCNT) nanocomposites have been prepared with nanotube concentrations between 0.01 wt% and 1 wt%. MWCNT as-synthesized samples with ~74 nm diameter and ~7 μm length were introduced by solution processing in the polyurethane matrix. Scanning electron microscopy (SEM) images demonstrated good dispersion and adhesion of the CNTs to the polymeric matrix. The C=O stretching band showed evidence of perturbation of the hydrogen interaction between urethanic moieties in the nanocomposites as compared to pure TPU. Differential scanning calorimetry and positron anihilation lifetime spectroscopy measurements allowed the detection of glass transition displacement with carbon nanotube addition. Furthermore, the electrical conductivity of the nanocomposites was significantly increased with the addition of CNT.

【 授权许可】

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