Preparation of novel polymer-metal oxide nanocomposites with nanophase separated hierarchical structure

Abstract

This article deals with preparation of nanocomposite which comprised of nanophase separated structure of polymer chains and metal oxide. By grafting poly(hydroxyethyl methacrylate), poly(HEMA) on the surface of titanium which is covered by passive titanium oxide by atom transfer radical polymerization (ATRP) and executing anodic polarization, hierarchy nanophase separated structure with controlled thickness can be obtained. The titanium ions would be cationically charged and completely filled up the unoccupied binding sites of the polymer chains via electrochemical reaction, eventually covering the polymer chains with titanium oxide. However, this structure can be obtained when the anodic polarization is executed at initial applied voltage exceeding 10 V SCE. The control of thickness is possible by controlling the initial applied voltage. These results prove that the conventional polymer can form composite structure with metal oxide without using fillers or special polymers designed for composite.

Photocatalytic activity of polyaniline‐potassium doped nickel oxide nanocomposites: A comprehensive investigation on multifaceted properties

“…The electronic polarization prevailed at high frequency (>5.5) due to the opposite displacement of the electron and the positive nuclear within the same atom. The atomic polarization prevailed at high frequency (>5.5) because of the vibration of chemical bonds 113 . The ionic polarization occurs at a lower frequency (<5.5) due to the displacement of negative and positive ions 104 .…”

“…The atomic polarization prevailed at high frequency (>5.5) because of the vibration of chemical bonds. 113 The ionic polarization occurs at a lower frequency (<5.5) due to the displacement of negative and positive ions. 104 The orientational or dipolar polarization operates at radio to microwave frequencies because of dipolar groups attached to polymeric chains, and the electric dipoles are the origination of dipolar polarization.…”

Electrochemical Synthesis of Nanocomposites

“…• The properties of the reinforcing particles: particle size, surface properties, concentration, and type of dispersion in the electrolyte [23,36].…”

“…• Polymer Matrix Nanocomposites (PMNC), such as Thermoplastic/thermoset polymer/ layered silicates [21], polyester/ Fe 2 O 3 [22], polyester/TiO 2 [23].…”