Accession Number:

ADA622805

Title:

Influencing Solvent Miscibility and Aqueous Stability of Aluminum Nanoparticles through Surface Functionalization with Acrylic Monomers (Postprint)

Descriptive Note:

Journal article

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE

Report Date:

2010-08-26

Pagination or Media Count:

13.0

Abstract:

With growing interest in the development of new composite systems for a variety of applications that require easily processable materials and adequate structural properties with high energy densities, we have pursued the chemical functionalization of oxide-passivated aluminum nanoparticles nAl using three acrylic monomers, 3- methacryloxypropyltrimethoxysilane MPS, 2-carboxyethyl acrylate CEA, and phosphonic acid 2-hydroxyethyl methacrylate ester PAM, to provide chemical compatibility within various solvent and polymeric systems. Fourier transform infrared and Xray photoelectron spectroscopy suggest that attachment of MPS and PAM monomers occurs through the formation of bonds directly to the passivated oxide surface upon reaction with surface hydroxyls, whereas CEA monomers interact through the formation of ionic carboxylate binding to aluminum atoms within the oxide. The coated particles demonstrate enhanced miscibility in common organic solvents and monomers MPS and PAM coatings are additionally shown to inhibit oxidation of the aluminum particles when exposed to aqueous environments at room temperature, and PAM coatings are stable at even elevated temperatures.

Subject Categories:

  • Physical Chemistry
  • Coatings, Colorants and Finishes
  • Laminates and Composite Materials
  • Metallurgy and Metallography
  • Plastics
  • Solvents, Cleaners and Abrasives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE