abstract
Antistatic packaging has gained great importance for protecting sensitive electronic devices against static charges. In this work, polyamide 6 (PA6)/carbon nanotubes (MWCNT) nanocomposites were developed in the molten state, aiming to evaluate the potential for dissipation of static charges. The properties of torque rheometry, melt flow index (MFI), mechanical (impact, tensile, and Shore D hardness), Raman spectroscopy, electrical conductivity, differential scanning calorimetry (DSC), thermogravimetry (TG), and scanning electron microscopy (SEM) were investigated. In the Raman spectra of the nanocomposites, the main MWCNT bands were observed at 1347 cm-1 and 1580 cm-1, confirming the distribution in the PA6 matrix. Incorporating 5 phr (parts per hundred resin) of MWCNT into the PA6 matrix promoted better distribution, as verified in the storage module and scanning electron microscopy (SEM). In addition, there were gains in elastic modulus, Shore D hardness, and heat deflection temperature (HDT) by 11%, 4.5%, and 12.3%, respectively, in relation to PA6. Differential scanning calorimetry (DSC) indicated an increase in the crystallization process for all PA6/MWCNT nanocomposites, while an increase of 9.4 degrees C was verified in thermal stability by thermogravimetry for PA6/MWCNT (5 phr). From the point of view of the potential for antistatic application, the PA6/MWCNT (5 phr) nanocomposite presented electrical conductivity in the order of 1.1 x 10-06 S/cm, an adequate value for dissipating static charges. In view of this, the tailor-made PA6/MWCNT (5 phr) nanocomposite has the potential for antistatic protection.
keywords
CARBON NANOTUBES; COMPOSITES; CRYSTALLIZATION; MORPHOLOGY; BEHAVIOR
subject category
Polymer Science
authors
da Silva, FS; Luna, CBB; Ferreira, EDB; Costa, ARD; Wellen, RMR; Araújo, EM
our authors
Anna Raffaela de Matos
Junior Researcheracknowledgements
The authors would like to thank CAPES for granting a research grant (Funding code 001), CNPq for financial assistance under process 350025/2023-1 (Carlos Luna), 303426/2021-7 (Renate Wellen), and 312014/2020-1 (Edcleide Araujo). In addition, the authors acknowledge UFCG for the infrastructure of the laboratories. The authors would like to thank the Institute of Polymers, Composites, and Biomaterials (IPCB) for carrying out the DSC and TG analyses.