Scientometric analysis and critical review of fused deposition modeling in the plastic recycling context

Abstract

Plastics have emerged as one of the essential materials present on the planet. However, its accumulation can negatively impact the environment if not disposed of properly. To counter this issue, the ‘Circular Economy’ is one such economic growth model with one of the objectives of using plastic resources efficiently. Several plastic recycling methodologies have been derived, out of which Distributed Recycling via Additive Manufacturing (DRAM) is one of them. The main objective of this study aims to form an optimal link between two different areas of knowledge domains: plastic recycling and additive manufacturing. A scientometric analysis has been conducted to measure the former knowledge domains mentioned to accomplish this goal. From the results, the Scopus database yields 1452 relevant publications between 2013 and 2021. The results suggest that Fused Deposition Modeling (FDM) is the most used AM technology on recycled plastics. Hence, the review targets the FDM process in the context of plastic recycling. A critical review has been done, which shows the material characterization of recycled polymers in AM. This is followed by an in-depth analysis of the FDM technology, including discussions on influencing parameters of this process. The following results present the multi-material mixing of plastics and Direct FDM systems and their relevance in plastic recycling. These two areas create opportunities to increase the variety of feedstock materials that can be 3D printed. Lastly, the authors have proposed some future directions based on the literature review done in this work. • Fused deposition modeling process in context to plastic recycling is discussed. • Scientometric analysis was done to get a knowledge domain of relevant studies through the scientific-mapping approach. • Potential thermoplastics such as PLA, ABS, HIPS, PC, etc. have suitable material characteristics required for recycling. • Infill density and raster angle significantly affect tensile strength. • Direct FDM systems increase the variety of feedstock materials available for the FDM process.