Scientists fabricate composites that combine high strength and bioactivity inspired by the cortical bone

[Pelican Press 0]

Scientists fabricate composites that combine high strength and bioactivity inspired by the cortical bone

by KeAi Communications Co.

How To Fabriate The nHA/PEKK Composites. Credit: Zhongyi Wang

Researchers have created scaffolds with enhanced strength by fabricating 20 vol% polydopamine-modified nano hydroxyapatite (pDA-nHA), featuring a distinctive lamellar structure. These scaffolds were then immersed in a polyetherketoneketone (PEKK) synthesis system for reinforcement, offering an innovative approach to both augment the mechanical robustness of the material and enhance the bioactivity of PEKK.

Nano hydroxyapatite (nHA), the primary inorganic component of bone widely utilized in bone tissue engineering, suffers from poor mechanical properties when used alone. Conversely, polyetherketoneketone (PEKK), a high-performance polymer approved by the US Food and ***** Administration (FDA) and used in dentistry and biomaterial science, struggles with bioinertia, affecting its osteogenesis applications.

In a study

This is the hidden content, please

• Sign In
• or
• Sign Up

in the journal Supramolecular Materials, researchers from Sichuan University, China, introduced pDA-nHA/PEKK composites that combine high strength and bioactivity.

“The optimal combination of nHA and PEKK can achieve higher mechanical property and bioactivity,” says lead author Zhongyi Wang. “Nevertheless, conventional melt blending techniques often result in weakened strength due to nanoparticle agglomeration and the lack of chemical bonds between the inorganic and organic constituents.”

To that end, the team drew inspiration from the structure of cortical bone. By employing freeze-casting technology, the researchers mimicked the bone’s hierarchical structure, which is known for its exceptional stiffness and toughness. This technique allowed them to produce complex hierarchical materials.

The novel approach, characterized by the in-situ polymerization of PEKK, resulted in the development of pDA-nHA scaffolds with enhanced osteo-inductive abilities and supplemented mechanical strength through PEKK.

Corresponding Haiyang Yu highlighted this development as an advancement in supramolecular materials, surpassing the strength capabilities of current methods. Yu hopes their approach to hierarchical architecture and in-situ polymerization will inspire further scientific discoveries.

More information:
Zhongyi Wang et al, Fabrication of the polyetherketoneketone-reinforced nano-hydroxyapatite composites as inspired by the cortical bone, Supramolecular Materials (2024).

This is the hidden content, please

• Sign In
• or
• Sign Up

Provided by
KeAi Communications Co.

Citation:
Scientists fabricate composites that combine high strength and bioactivity inspired by the cortical bone (2024, April 22)
retrieved 22 April 2024
from

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

This is the hidden content, please

• Sign In
• or
• Sign Up

Science, Physics News, Science news, Technology News, Physics, Materials, Nanotech, Technology, Science
#Scientists #fabricate #composites #combine #high #strength #bioactivity #inspired #cortical #bone

This is the hidden content, please

• Sign In
• or
• Sign Up

For verified travel tips and real support, visit: https://hopzone.eu/