TITLE:
Implementation of a Simulation Model of the Controlled Release of Molecular Species from Halloysite Nanotubes
AUTHORS:
Divya Narayan Elumalai, Yuri Lvov, Pedro Derosa
KEYWORDS:
Diffusion, Controlled Release, Halloysite Nanotubes, Montecarlo, Sustained Release
JOURNAL NAME:
Journal of Encapsulation and Adsorption Sciences,
Vol.5 No.1,
March
24,
2015
ABSTRACT: In this work a three-dimensional, time-quantified Monte Carlo model that efficiently describes diffusion through and from nanotubes is implemented. Controlled delivery from Halloysite Nano-tubes (HNT) is modeled based on interactions between the HNT’s inner wall and the nanoparticles (NPs) and among NPs themselves. The model was validated using published experimental data. The validated model is then used to study the effect of multiples parameter like HNT diameter and length, particle charge, and ambient temperature on the release of encapsulated NPs. The results show that release profiles depend on the size distribution of the HNT batch used for the experiment, as delivery is sensitive to HNT lumen and length. A very good agreement with the experiment is observed when a weighted average release profile is compared to the experimental profile. Although the NP dynamics is temperature-dependent, the effect is minimum within the range of temperatures relevant to biomedical applications, but will be relevant for other applications at temperatures significantly different from room temperature. This model can be used to predict the best conditions for a particular delivery need.