Viscoelastic properties and thermal stability of nanohydroxyapatite reinforced poly-lactic acid for load bearing applications

Tools

Michael, Feven Mattews and Khalid, Mohammad and Raju, Gunasunderi and Ratnam, Chantara Thevy and Walvekar, Rashmi and Mubarak, Nabisab Mujawar (2021) Viscoelastic properties and thermal stability of nanohydroxyapatite reinforced poly-lactic acid for load bearing applications. Molecules, 26 (19). 5852. ISSN 1420-3049 (https://doi.org/10.3390/molecules26195852)

[thumbnail of Michael-etal-Molecules-2021-Viscoelastic-properties-and-thermal-stability-of-nanohydroxyapatite-reinforced]
Preview
 Text. Filename: Michael-etal-Molecules-2021-Viscoelastic-properties-and-thermal-stability-of-nanohydroxyapatite-reinforced.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo
Download (1MB)| Preview

Abstract

We studied the reinforcing effects of treated and untreated nanohydroxyapatite (NHA) on poly-lactic acid (PLA). The NHA surface was treated with three different types of chemicals; 3-aminopropyl triethoxysilane (APTES), sodium n-dodecyl sulfate (SDS) and polyethylenimine (PEI). The nanocomposite samples were prepared using melt mixing techniques by blending 5 wt% untreated NHA and 5 wt% surface-treated NHA (mNHA). Based on the FESEM images, the interfacial adhesion between the mNHA filler and PLA matrix was improved upon surface treatment in the order of mNHA (APTES) > mNHA (SDS) > mNHA (PEI). As a result, the PLA-5wt%mNHA (APTES) nanocomposite showed increased viscoelastic properties such as storage modulus, damping parameter, and creep permanent deformation compared to pure PLA. Similarly, PLA-5wt%mNHA (APTES) thermal properties improved, attaining higher Tc and Tm than pure PLA, reflecting the enhanced nucleating effect of the mNHA (APTES) filler.

ORCID iDs

Michael, Feven Mattews, Khalid, Mohammad, Raju, Gunasunderi, Ratnam, Chantara Thevy, Walvekar, Rashmi ORCID logoORCID: https://orcid.org/0000-0001-8283-1278 and Mubarak, Nabisab Mujawar;
CORE (COnnecting REpositories)