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Salt induced polystyrene latex flocs investigated by neutron scattering
Namibia Univ Sci & Technol, Fac Hlth & Appl Sci, Private Bag 13388,13 Starch St, Windhoek, Namibia..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
NIST, Ctr Neutron Res, 100 Bur Dr,Stop 6102, Gaithersburg, MD 20899 USA.;Univ Delaware, Chem & Biomol Engn, 150 Acad St, Newark, DE 19716 USA..
NIST, Ctr Neutron Res, 100 Bur Dr,Stop 6102, Gaithersburg, MD 20899 USA..
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2017 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 505, 9-13 p.Article in journal (Refereed) Published
Abstract [en]

Studies with a model system consisting of polystyrene latex particles showed that the protein from seeds of Moringa trees adsorbs to the surface and causes flocculation as unusually dense aggregates. In this study, electrolytes sodium chloride (NaCI), ferric chloride (FeCl3) and aluminium sulfate (Al-2(SO4)(3)) have been used to aggregate model polystyrene particles. The study augments previous work using neutron scattering on the flocculation of polystyrene latex with protein from seeds of Moringa trees that had indicated higher floc dimension, df, values as the concentration of particles increased. The measurements were made using ultra small-angle neutron scattering. Generally the fractal dimension, and thus the floc density, increased with particle concentration and salt concentration. Flocculation was apparent at much lower concentrations of FeCl3 and Al-2(SO4)(3) than of NaCI. The values of df were found not to simply scale with ionic strength for the three electrolytes studied with FeCl3 being the most effective flocculating agent.

Place, publisher, year, edition, pages
ACADEMIC PRESS INC ELSEVIER SCIENCE , 2017. Vol. 505, 9-13 p.
Keyword [en]
Aluminium sulfate, Critical coagulation concentration, Ferric chloride, Floc dimension, Flocs, Polystyrene latex, Ultra small-angle neutron scattering
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-335114DOI: 10.1016/j.jcis.2017.05.047ISI: 000410464100003PubMedID: 28554043OAI: oai:DiVA.org:uu-335114DiVA: diva2:1161965
Funder
Swedish Research Council, 348-2011-7241
Available from: 2017-12-01 Created: 2017-12-01 Last updated: 2017-12-01Bibliographically approved

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Hellsing, Maja S.Rennie, A. R.

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