A perspective on the structure and properties of nanocomposites

The addition of carbon nanofibers (CNFs) and graphene to thermoplastic polymers has the potential to increase the mechanical and electrical properties. The aim of the current study is to investigate the effect of CNF and graphene on the properties of three‐dimensional (3D) printed polylactic acid (PLA) samples. The samples are printed using the PLA–graphene–CNF composite filament via fused deposition modeling. As a first objective, composite filament and pure PLA filament characteristics were compared using tensile, scanning electron microscopy and thermogravimetric analysis (TGA) data. Compared with pure PLA filaments, composite filaments revealed an almost 28% reduction in tensile strength due to interfacial defects (poor bonding between PLA and graphene and CNF). Furthermore, 3D printed composite sample properties are compared with 3D printed pure PLA sample using tensile and electrical conductivity data. The 3D printed composite samples also showed less tensile strength (25 MPa) compared with pure PLA 3D samples (37–47 MPa) due to the presence of microvoids. These voids also caused reduction in tensile strength and electrical conductivity of 3D printed composites when compared with the filament properties. The effect of layer orientation was also studied by printing samples at [0°/90°] and [45°/−45°] orientations and found that samples with [45°/−45°] orientation revealed higher elongation (>100%) and lower electrical conductivity. It is observed that the presence of graphene and lack of bonding between PLA and CNF resulted in the improper fusion of the printed layers, which led to a decrease in tensile strength and electrical conductivity but an increase in toughness.

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Mechanical and electrical properties of three‐dimensional printed polylactic acid–graphene–carbon nanofiber composites

Santo

Penumakala

Adusumalli

2021

Polymer Composites

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Machine learning algorithms to optimize the properties of bio-based poly(butylene succinate-co- butylene adipate) nanocomposites with carbon nanotubes

Champa-Bujaico,

Díez-Pascual,

Garcia-Diaz

et al. 2024

Industrial Crops and Products

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The Biomimetic Evolution of Composite Materials: From Straw Bricks to Engineering Structures and Nanocomposites

Marom

2021

J. Compos. Sci.

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Advanced polymer-based composite materials have revolutionized the structural material arena since their appearance some 60 years ago. Yet, despite their relatively short existence, they seem to be taken for granted as if they have always been there. One of the reasons for this state of affairs is that composite materials of various types have accompanied human history for thousands years, and their emergence in the modern era could be considered a natural evolutionary process. Nevertheless, the continuous line that leads from early days of composites in human history to current structural materials has exhibited a number of notable steps, each generating an abrupt advance toward the contemporary new science of composite materials. In this paper, I review and discuss the history of composites with emphasis on the main steps of their development.

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A perspective on the structure and properties of nanocomposites

Cited by 5 publications

References 12 publications

Mechanical and electrical properties of three‐dimensional printed polylactic acid–graphene–carbon nanofiber composites

Mechanical and electrical properties of three‐dimensional printed polylactic acid–graphene–carbon nanofiber composites

Machine learning algorithms to optimize the properties of bio-based poly(butylene succinate-co- butylene adipate) nanocomposites with carbon nanotubes

The Biomimetic Evolution of Composite Materials: From Straw Bricks to Engineering Structures and Nanocomposites

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