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Developing a novel technique for the fabrication of PLA-graphite composite filaments using FDM 3D printing process

Mohammadi Zerankeshi, M ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ceramint.2022.07.117
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. Developing a uniform polymer-based composite filament is a critical factor for a successful 3D printing process. In this regard, a novel technique for the fabrication of PLA-graphite filament with the potential to be applied to other PLA-based composite filaments was proposed and compared to the solvent casting method. This modified mixing technique involves partial dissolution of the PLA pellets surface by dichloromethane (DCM), which creates a sticky surface for the strong adhesion of reinforcement powders. The manufactured composite filament by this method exhibited excellent structural features, while the solvent casting method yielded a heterogeneous filament with a non-uniform diameter and numerous voids. In addition, graphite, as a cost-effective carbon-based filler for polymer matrix composites, could effectively act as a reinforcement phase, leading to noticeable mechanical strength enhancement of PLA. Furthermore, significantly enhanced printability and mechanical properties of 3D-printed PLA-graphite composite specimens indicate the efficiency of the modified mixing method as a practical and time-saving technique for developing uniform PLA-based composite filaments for the extrusion-based additive manufacturing techniques such as FDM. © 2022
  6. Keywords:
  7. Additive manufacturing ; Composite filaments ; FDM ; Mixing method ; Additives ; Cost effectiveness ; Fabrication ; Filled polymers ; Frequency division multiplexing ; Fused Deposition Modeling ; Mixing ; Polymer matrix composites ; Printing presses ; Reinforcement ; 3D printing process ; Composite filament ; Critical factors ; Graphite composites ; Novel techniques ; PLA-graphite ; Polymer based composite ; Printability ; Solvent casting method ; Graphite
  8. Source: Ceramics International ; Volume 48, Issue 21 , 2022 , Pages 31850-31858 ; 02728842 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0272884222025068