In-vitro studies of SS 316 L biomedical implants prepared by FDM, vapor smoothing and investment casting

Singh, Daljinder; Singh, Rupinder; Boparai, Kamaljit Singh; Farina, Ilenia; Feo, Luciano; Verma, Anita

doi:10.1016/j.compositesb.2017.08.019

Cited by 65 publications

(25 citation statements)

References 37 publications

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“…Biomaterial implants are clinically used in a variety of applications, and their interaction with cells or tissue is important for the patient health and quality of life. They should act as artificial replacements, since the primary requirement of any material is its biocompatibility inside the human body [1]. Immediately following implantation, proteins and other biomolecules that are present in the blood plasma and biological fluids rapidly adsorb on the surface of biomaterials, leading to structural changes and different biological response [2].…”

Section: Introductionmentioning

confidence: 99%

Sol-Gel Synthesis, Spectroscopic and Thermal Behavior Study of SiO2/PEG Composites Containing Different Amount of Chlorogenic Acid

et al. 2018

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In this work, new phenol-based materials have been synthesized by the sol-gel method, in which different amounts of the phenolic antioxidant chlorogenic acid (CGA) (from 5 wt % to 20 wt %) were embedded in two different silica matrices: pure silica and silica-based hybrids materials, containing 50 wt % of polyethylene glycol (PEG). The incorporation of CGA in different sol-gel matrices might protect them from degradation, which could cause the loss of their properties. The two series of materials were chemically characterized by Fourier transform infrared (FTIR) spectroscopy. In addition, the thermal behavior of both series of materials containing CGA was studied by thermogravimetry under both air and inert N 2 flowing gas atmosphere. The bioactivity was evaluated by soaking the synthesized hybrids in a simulated body fluid, showing that the bioactivity of the silica matrix is not modified by the presence of PEG and CGA.

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Section: Introductionmentioning

confidence: 99%

Sol-Gel Synthesis, Spectroscopic and Thermal Behavior Study of SiO2/PEG Composites Containing Different Amount of Chlorogenic Acid

et al. 2018

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“…Further, the SN values of PL have been used for optimization and similar studies have been performed for BL, PS, and BS using the given two equations for calculation 25,26 …”

Section: Resultsmentioning

confidence: 99%

Multimaterial printing and characterization for mechanical and surface properties of functionally graded prototype

Kumar

Singh

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this work, an effort has been made for multimaterial three-dimensional printing of functionally graded prototypes of polylactic acid matrix (tensile specimens as per ASTM D638 type IV) followed by characterization of mechanical and surface properties. The work is an extension of previous reported studies on twin-screw extrusion process for the preparation of multimaterial wires as feedstock filaments in possible three-dimensional printing applications. The results of the study suggest that the highest peak strength (46.28 MPa) and break strength (41.65 MPa) was obtained for multimaterial three-dimensional printed samples at infill density 100%, infill angle 45°, and infill speed of 90 mm/s on commercial open source fused deposition modeling setup. Further surface hardness measurements performed on two extreme surfaces (top surface comprising magnetite (Fe3O4)-reinforced polylactic acid and bottom with polylactic acid without any reinforcement) revealed that the hardness for the bottom layer was more than the hardness for the top layer. From fractured surface analysis (using photomicrographs), it has been observed that the three-dimensional printed samples with low infill density resulted into more void formation due to which the performance while mechanical testing was poor in comparison to samples printed with higher infill density. The results are also supported by rendered images of photomicrographs, which revealed that high roughness value of samples printed with low infill density was also one of the reasons for poor mechanical performance of multimaterial three-dimensional printed functionally graded prototypes.

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“…PLA exhibits a range of crystallinity and mechanical properties between polystyrene and polyethylene terephthalate. The bio-degradability and bio-compatibility are the key advantages of PLA to promote its use in the structural and bio-medical applications [34,35]. ‘HIPS’ is a low-cost polymer which provides ease of fabrication and machining.…”

Section: Introductionmentioning

confidence: 99%

Multi-Material Additive Manufacturing of Sustainable Innovative Materials and Structures

et al. 2019

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This paper highlights the multi-material additive manufacturing (AM) route for manufacturing of innovative materials and structures. Three different recycled thermoplastics, namely acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), and high impact polystyrene (HIPS) (with different Young’s modulus, glass transition temperature, rheological properties), have been selected (as a case study) for multi-material AM. The functional prototypes have been printed on fused deposition modelling (FDM) setup as tensile specimens (as per ASTM D638 type-IV standard) with different combinations of top, middle, and bottom layers (of ABS/PLA/HIPS), at different printing speed and infill percentage density. The specimens were subjected to thermal (glass transition temperature and heat capacity) and mechanical testing (peak load, peak strength, peak elongation, percentage elongation at peak, and Young’s modulus) to ascertain their suitability in load-bearing structures, and the fabrication of functional prototypes of mechanical meta-materials. The results have been supported by photomicrographs to observe the microstructure of the analyzed multi-materials.

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In-vitro studies of SS 316 L biomedical implants prepared by FDM, vapor smoothing and investment casting

Cited by 65 publications

References 37 publications

Sol-Gel Synthesis, Spectroscopic and Thermal Behavior Study of SiO2/PEG Composites Containing Different Amount of Chlorogenic Acid

Sol-Gel Synthesis, Spectroscopic and Thermal Behavior Study of SiO2/PEG Composites Containing Different Amount of Chlorogenic Acid

Multimaterial printing and characterization for mechanical and surface properties of functionally graded prototype

Multi-Material Additive Manufacturing of Sustainable Innovative Materials and Structures

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