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Evaluation of poly(vinylidene fluoride)/carbon black composites, manufactured by selective laser sintering
Author(s) -
Brito Guaricela Joffre Luis,
Ahrens Carlos Henrique,
Oliveira Barra Guilherme Mariz,
Merlini Claudia
Publication year - 2021
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.25991
Subject(s) - materials science , composite material , carbon black , differential scanning calorimetry , composite number , scanning electron microscope , selective laser sintering , thermogravimetric analysis , sintering , fluoride , natural rubber , chemical engineering , inorganic chemistry , chemistry , physics , engineering , thermodynamics
In this study, we investigated the viability of processing composites based on poly(vinylidene fluoride) and carbon black (PVDF/CB) applying the selective laser sintering (SLS) process, with equipment constructed in the laboratory. In the first step, the powder particles of PVDF and CB were characterized by scanning electron microscope, particle size distribution, differential scanning calorimetry, and thermogravimetric analysis. In order to evaluate the effect of CB on the morphology, electrical conductivity, and mechanical properties, specimens of PVDF/CB composites with different weight fractions (wt%) were manufactured. The addition of conductive CB to the PVDF matrix improves the mechanical properties up to a certain point, with fractions greater than 1.00 wt% of CB resulting in a decrease in the mechanical properties of the composite. For the composite with 0.5 wt% of CB the electrical conductivity was around 10 −4 S/cm, representing an increase of approximately 10 orders of magnitude when compared to the neat PVDF (3.41 x 10 −15 S/cm). In addition, increases of 59% for the elastic modulus and 150% for the maximum stress were observed when compared to the corresponding values for neat PVDF. The results obtained in this study demonstrate the potential for the use of PVDF/CB composites as a raw material to produce functional components by the SLS process.