April 29, 2024
Mehdi Hatami

Mehdi Hatami

Academic rank: Associate professor
Address: Department of Polymer Science and Engineering, University of Bonab, P.O. Box 5551761167, Bonab, Iran
Education: Ph.D in Polymer chemistry
Phone: 04137745000
Faculty: Faculty of Engineering
Department: Polymer Engineering

Research

Title
Production and evaluation of the surface properties of chiral poly(amide-imide)/TiO2 nanocomposites containing L-phenylalanine units
Type Article
Keywords
Float up analysis Homogenous dispersion 3-Aminopropyltri-ethoxysilane Optically active poly(amide-imide) TiO2 nanoparticles L-Phenylalanine amino acid
Researchers Shadpour Mallakpour، Mehdi Hatami

Abstract

This study concerted on the immobilization of nano-titanium dioxide particles (TiO2, 30–50 nm particle size) into or onto an optically active poly(amide-imide) (PAI). The matrix PAI consisted of the chiral units in the main and hydroxybenzamide functional groups in the side chains. The macromolecule structure has been fabricated from the reaction of 3,5-diamino-N-(4-hydroxyphenyl) benzamide and N,N -(pyromellitoyl)-bis-L-phenylalanine diacid chloride atlow temperature. The hydroxyl groups on the side chains of the PAI could provide better compatibility and bonding, which cause to suitable homogenous dispersion of nanoparticles (NPs) in the obtained nanocomposites (NCs). Also due to prevention of aggregation, the surface of TiO2 NPs was functionalized by 3-aminopropyltri-ethoxysilane as a coupling agent to introduce amine groups on the NPs surfaces. Atomic force microscopy, field emission scanning electron microscopy, transmission electron microscopy and contact angle measurements were used for investigation of the surface properties of obtained NCs. These results confirmed the well-dispersion of nanoTiO2 in the PAI matrix.