Rheological, mechanical, thermal, tribological and morphological properties of PLA-PEKK-HAp-CS composite

Singh, Gurchetan; Kumar, Raman; Singh, Rupinder; Rahman, M. M.; Ramakrishna, Seeram

doi:10.1007/s11771-021-4721-y

Cited by 5 publications

(2 citation statements)

References 28 publications

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“…The build material used commercially available off-the-shelf PEEK, PEKK and CF-PEEK filaments, with 1.75 mm diameter. The thermal characteristics of the investigated material have been extensively reported [38,[45][46][47]. PEEK has a glass transition temperature of 143 • C and a melting point of 343 • C. Similarly, PEKK material has a glass transition temperature of 165 • C and melts at 300 • C. CF-PEEK material displays a T g at 150 • C and a T m at 340 • C.…”

Section: Feedstock Materialsmentioning

confidence: 99%

Thermoplastic Extrusion Additive Manufacturing of High-Performance Carbon Fiber PEEK Lattices

et al. 2021

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Polyetheretherketone (PEEK) has been the focus of substantial additive manufacturing research for two principal reasons: (a) the mechanical performance approaches that of aluminum at relatively high temperatures for thermoplastics and (b) the potential for qualification in both the aerospace and biomedical industries. Although PEEK provides outstanding strength and thermal stability, printing can be difficult due to the high melting point. Recently, high-temperature soluble support has enabled the printing of lattices and stochastic foams with overhanging features in these high-performance carbon fiber thermoplastics, in which density can be optimized to strike a balance between weight and strength to enhance performance in applications such as custom implants or aerospace structures. Although polymer powder bed fusion has long been capable of the combination of these geometries and materials, material extrusion with high-temperature sacrificial support is dramatically less expensive. This research provides a comprehensive mechanical analysis and CT-scan-based dimensional study of carbon fiber PEEK lattice structures enabled with high-temperature support and including model validation.

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Section: Feedstock Materialsmentioning

confidence: 99%

Thermoplastic Extrusion Additive Manufacturing of High-Performance Carbon Fiber PEEK Lattices

et al. 2021

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“…3D technologies such as photography, modeling, and printing have evolved as accurate and practical tools for manufacturing an infinite number of technical and biological components. 1 Many researchers have investigated metallic and non-metallic materials in 3D printing procedures such as direct metal laser sintering (DMLS), 2 fused filament fabrication (FFF), 3 bio-printing, and stereolithography to produce prostheses, 4 scaffolds, and implants. 5 3D printed fluoropolymers are expensive because the filaments were recently commercialized to enable FFF of functional parts for high purity, and biocompatibility needs.…”

Section: Introductionmentioning

confidence: 99%

On PVDF composite as partially absorbable smart implants

Husain

Singh

Pabla

2023

Proc Inst Mech Eng H

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For various orthopedic needs, several studies have been testified on non-absorbable implants, prepared with different metals/alloys, and composites. But yet little has been stated on the partially absorbable smart implants of thermoplastic composites for online health monitoring of veterinary patients. This article highlights the in-house development of affordable, polyvinylidene fluoride (PVDF) composite-based partially absorbable smart implants (with online sensing capability) for orthopedic needs in canines. Hydroxyapatite (HAp) and chitosan (CS) nanoparticles were reinforced in the PVDF matrix by a melt processing route with various weight proportions (wt.%) to fabricate a partially absorbable smart implant for the canine. The study suggests that the 8.0 wt.% HAp and 2.0 wt.% CS in PVDF is the superlative composition/proportion of reinforcement for preparing feedstock stock filaments (for 3D printing of partially absorbable smart implants), based on rheological, mechanical, thermal, dielectric, and voltage-current-resistance ( V- I- R) characteristics. For the selected composition/proportion of PVDF composite, acceptable mechanical properties (such as modulus of toughness (MoT) 2.0 MPa, Young’s modulus (E) 889 MPa), and dielectric properties (dielectric constant (ε r) 9.6 at room temperature (30°C) and 20 MHz) for online sensing capabilities (for health monitoring) was observed. The results are braced by attenuated total reflection Fourier transform infrared (ATR-FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) analysis.

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