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01-03-2016 | Research Paper | Issue 3/2016

Journal of Nanoparticle Research 3/2016

Comparative study of silver nanoparticle permeation using Side-Bi-Side and Franz diffusion cells

Journal:
Journal of Nanoparticle Research > Issue 3/2016
Authors:
Raul A. Trbojevich, Avelina Fernandez, Fumiya Watanabe, Thikra Mustafa, Matthew S. Bryant

Abstract

Better understanding the mechanisms of nanoparticle permeation through membranes and packaging polymers has important implications for the evaluation of drug transdermal uptake, in food safety and the environmental implications of nanotechnology. In this study, permeation of 21 nm diameter silver nanoparticles (AgNPs) was tested using Side-Bi-Side and Franz static diffusion cells through hydrophilic 0.1 and 0.05 µm pore diameter 125 µm thick synthetic cellulose membranes, and 16 and 120 µm thick low-density polyethylene (LDPE) films. Experiments performed with LDPE films discarded permeation of AgNPs or Ag ions over the investigated time-frame in both diffusion systems. But controlled release of AgNPs has been quantified using semipermeable hydrophilic membranes. The permeation followed a quasi-linear time-dependent model during the experimental time-frame, which represents surface reaction-limited permeation. Diffusive flux, diffusion coefficients, and membrane permeability were determined as a function of pore size and diffusion model. Concentration gradient and pore size were key to understand mass transfer phenomena in the diffusion systems.

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