Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/14213
Title: Dynamics, coagulation and phase behavior of latex in salt and surfactant solutions
Authors: HOON TIEN YUEN
Keywords: relaxation time, colloidal dispersion, redissolution, electrokinetic behaviour, aggregation
Issue Date: 31-Aug-2004
Source: HOON TIEN YUEN (2004-08-31). Dynamics, coagulation and phase behavior of latex in salt and surfactant solutions. ScholarBank@NUS Repository.
Abstract: Dynamic behaviour and the structure of latex beads in electrolyte solution were studied by using dynamic light scattering, static light scattering and zeta potential measurement. The fast mode of the spectra of relaxation time corresponds to the diffusion of individual single particles, whereas the slow mode represents the diffusion of particle aggregates. The slow mode depends on the standing time, counterion species, and the concentration of salt and latex. Redissolution of latex precipitates was found to occur at high salt concentration. Similar result was obtained at low salt concentration and low sodium dodecyl sulphate (SDS) concentration for SDS in salt with and without latex addition. The behavior difference between monovalent and multivalent cations is attributed to the decrease in the surface charge density and even a change in the charge sign for multivalent cations.
URI: http://scholarbank.nus.edu.sg/handle/10635/14213
Appears in Collections:Master's Theses (Open)

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summary.pdf44.72 kBAdobe PDF

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Chap1 Introduction.pdf552.03 kBAdobe PDF

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Chap2 Literature.pdf143.22 kBAdobe PDF

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Chap3 Methodology.pdf134.75 kBAdobe PDF

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