Hydroxyapatite/polyetheretherketone nanocomposites for selective laser sintering: Thermal and mechanical performances

Abstract

In this article, the thermal and mechanical properties of hydroxyapatite (HA)/polyetheretherketone (PEEK) nanocomposites were investigated. The surface of the HA particles was modified by stearic acid. Subsequently, the modified HA and PEEK were ultrasonically dispersed in ethanol and then subjected to drying and ball milling treatments. By controlling the concentration of modified HA, HA/PEEK nanocomposite powders containing various amounts of modified HA were successfully prepared. The tensile strength, impact strength, and flexural strength of the nanocomposite reached maximum values at 2.5 wt% HA and were 18.5%, 38.2%, and 5.7% higher than those of the pure PEEK, respectively. Moreover, the flexural modulus of the HA/PEEK nanocomposites increased at 2.5 wt% HA and was approximately 30% higher than that of the pure PEEK. The thermal property measurements (differential scanning calorimetry and thermogravimetric analysis) showed that the nanocomposites with 2.5 wt%-modified HA exhibited enhanced thermal stability as compared to the pure PEEK, showing potential for selective laser sintering.

Structural and Functional Adaptive Artificial Bone: Materials, Fabrications, and Properties

“…modified the surface of HAP particles by coating stearic acid to improve the distribution and phase interface of HAP and polymer. [ 172 ] Gazińska et al. modified the surface of HAP with polyethylene glycol by using l‐lysine as a linker molecule to improve the adhesion between HAP and PLLA/PLLGA matrices.…”

Unraveling of Advances in 3D-Printed Polymer-Based Bone Scaffolds

“…However, polymer materials such as polyether ether ketone (PEEK) with superior mechanical properties and biocompatibility are increasingly being used to manufacture bone scaffolds through SLS. Because of the high energy used in SLS to fuse the powder particles into a solid structure similar to natural cancellous bone, the scaffold shows high osteoblast attachment and bone differentiation [ 35 , 36 ]. The main limitation of SLS lies in the selection of polymer materials, the high temperature involved in the printing of scaffolds limits the use of cells and biological materials like FDM.…”

“…Wang et al mixed gelatin with bacterial cellulose (BC) treated with tempo-medicated oxidation (TO-BC) and maleic acid (MA-BC). The carboxyl group in cellulose can be cross-linked with the amide in gelatin through the hydrogen bond interaction between N-Hydroxysuccinimide (NHS) and 1-(3-dimethyl aminopropyl)-3-(ethyl carbodiimide hydrochloride) (EDC) to enhance the mechanical strength and gel stability of gelatin, which is more suitable for printing of tissue scaffolds [ 35 ].…”

Recent Advances on High‐Performance Polyaryletherketone Materials for Additive Manufacturing

“…The in situ synthesized HA can form a good interfacial bonding with the PAEK surface without agglomeration, thereby enhancing the mechanical properties and bioactivity of the composite. [57] Additionally, solution coating is a good method to prepare composite powders with an improved powder morphology. Chen et al successfully developed a dissolution-coating method for preparing nanocomposite powders with a coreshell structure.…”