Open AccessBrownian Dynamics Simulation of Colloidal Gels as Matrix for Controlled Release Application
Author(s) -
Hira Meidia,
Danial Irfachsyad,
Dennis Gunawan
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/553/1/012011
Subject(s) - brownian dynamics , inverse , debye , volume fraction , colloid , debye length , brownian motion , matrix (chemical analysis) , crystallization , phase (matter) , materials science , work (physics) , chemistry , thermodynamics , physics , chromatography , mathematics , condensed matter physics , ion , geometry , organic chemistry , quantum mechanics
The form of crystallization colloidal gels is important as matrix for controlled release application. In this work, we use the Brownian Dynamics simulation to study the formation of gels by varying the inverse Debye length. We choose a fixed volume fraction, ϕ = 0.1 and a fixed quenched temperature at room temperature, while the inverse Debye length, κ, is varied. To ensures that the simulations cover the fluid-phase region down to the unstable phase region above the critical coagulation concentration, the inverse Debye length is varied between κ = 120σ −1 to 250σ −1 . It shows that at the inverse Debye length κ = 250σ −1 the gel forms by colloidal particles that can support the active ingredient by forming long range network.