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Surface modification of nanohydroxyapatite and its loading effect on polylactic acid properties for load bearing implants
Author(s) -
Michael Feven Mattews,
Ratnam Chantara Thevy,
Khalid Mohammad,
Ramarad Suganti,
Walvekar Rashmi
Publication year - 2018
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24282
Subject(s) - materials science , ultimate tensile strength , polylactic acid , fourier transform infrared spectroscopy , surface modification , composite material , silicotungstic acid , nanocomposite , chemical engineering , polymer , chemistry , organic chemistry , catalysis , engineering
Blends of polylactic acid (PLA) and nanohydroxyapatite (NHA) were prepared through melt‐mixing by varying the composition of NHA from 1 to 5 wt%. The tensile properties of the PLA‐1 wt% NHA nanocomposite exhibited higher values than neat PLA. Beyond 1 wt% NHA, a drop in tensile properties of the PLA–NHA nanocomposites was observed due to agglomeration and poor interfacial adhesion between NHA and PLA. Therefore, NHA was surface modified (mNHA) using three different surface modifiers namely, 3‐aminopropyl triethoxysilane (APTES), sodium n ‐dodecyl sulfate (SDS) and polyethylenimine (PEI). The surface treatment of NHA was studied through Fourier transform infrared spectroscopy (FTIR) and energy dispersive X‐ray (EDX). Results revealed that the tensile properties increased in order of PLA‐5 wt% mNHA (APTES) followed by PLA‐5 wt% mNHA (SDS), whereas PEI modified NHA resulted in lower tensile properties. Further, increasing mNHA loading to 30 wt%, decreased the tensile strength due to agglomeration of mNHA. POLYM. COMPOS., 39:2880–2888, 2018. © 2016 Society of Plastics Engineers