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Master's Dissertation
DOI
10.11606/D.54.1980.tde-18082014-172714
Document
Author
Full name
Antonio Caliri
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1980
Supervisor
Committee
Mokross, Bernhard Joachim (President)
Brandi, Humberto Siqueira
Souza, Milton Ferreira de
Title in Portuguese
Interação entre partículas coloidais
Keywords in Portuguese
Equação de Poisson-Boltzmznn
Interação de Van der Walls-London
Método Runge-Kutta
Transição de fase do tipo Kirkwook-Alder e cristalização
Abstract in Portuguese
Neste trabalho efetuamos uma análise quantitativa das forças que atuam entre partículas coloidais. Para isto integramos a Equação de Poisson-Boltzmann não linearizada levando em consideração o tamanho finito dos íons. Os resultados são aplicados a sistemas formados por esferas de poliestireno em dispersão aquosa. Concluímos que as forças repulsivas são dominantes nestes sistemas permitindo-nos negligenciar as forças atrativas. Também efetuamos algumas comparações dos mesmos resultados com dados experimentais
Title in English
Interaction between colloidal particles
Keywords in English
Equation of Poisson-Boltzmann
Kirkwook-Alder phase transition and crystallization
Runge-Kutta method
van der Walls-London interaction
Abstract in English
We present a quantitative analisis of the forces acting in colloidal particles. For this purpose we integrated the non linerized Poisson- Boltzmann Equation by a numerical method. We took in accont the finite size of the ions and applied the results to systems formed by polystirene spheres in aqueous dispersion. We were able to conclude that the attractive forces can be neglicted in front of the repulsive forces. We also were able to perform same comparasion com experimental data
 
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Publishing Date
2014-08-21
 
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