Experimental investigations for preparation of biocompatible feedstock filament of fused deposition modeling (FDM) using twin screw extrusion process

Abstract

Twin screw extrusion (TSE) is one of the commercially established processes for reinforcement of metallic/nonmetallic/ceramic fillers in polymer matrix for tailor-made applications. In this study, biocompatible feedstock filament has been prepared (in-house) for commercial fused deposition modeling (FDM) setup with biocompatible grade polymers, namely polyvinyl chloride and polypropylene which was reinforced with the hydroxyapatite particles. The process parameters (namely, material composition, rotational speed of TSE, die temperature of TSE, HAp particle grain size, and applied load on TSE) were optimized using Taguchi L18 orthogonal array. In this study, mechanical, thermal, and metallurgical properties have been established, and best-feedstock filament wire for development of partial/complete denture on the FDM with functionally graded surfaces properties has been recommended for future applications.

Effect of extrusion parameters on primary recycled ABS: mechanical, rheological, morphological and thermal properties

“…The improvement in mechanical properties of 1°recycled thermoplastic material after TSE is certainly useful for enhancing the reusability/ recyclability of the polymers. These results are in line with the observations made by other investigators [21][22][23][24][25][26][27].…”

Partial dentures by centrifugal casting assisted by additive manufacturing

“…6. These results are in line with the observations made by other investigators [18,31,32,[40][41][42].…”

“…In order to ascertain the metallurgical properties, photomicrographs were taken [40] for all sets of experiments as per table 3 using a metallurgical microscope at 9100 magnifications. Figure 6 shows the photomicrographs for all nine samples as per table 3.…”

On compressive and morphological features of 3D printed almond skin powder reinforced PLA matrix

“…The literature reveals that the use of biodegradable/green waste enhances the mechanical properties and reduces the environmental pollution as well as cost [25][26][27][28][29][30][31]. But hitherto little has been reported on the use of the almond skin in powder form for enhancement of the compressive properties [13,[31][32][33][34]. In this study, composite of PLA and almond skin powder was subjected to compression test (as per ASTM D695), surface hardness (Shore D) investigation for possible use as biomedical scaffold as an extension of previously reported study [35] on preparation of feed stock filament for FFF.…”