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Permanent link (DOI): https://doi.org/10.7939/R3T727Q2R

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Application of Temperature-Responsive Polymers to Oil Sands Tailings Management Open Access

Descriptions

Other title
Subject/Keyword
polymers
oilsands
tailings
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Osborn, Ian
Supervisor and department
Xu, Zhenghe (Chemical and Material Engineering)
Examining committee member and department
Sanders, Sean (Chemical and Material Engineering)
Xu, Zhenghe (Chemical and Material Engineering)
Liu, Qingxia (Chemical and Material Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2015-02-26T13:27:14Z
Graduation date
2015-06
Degree
Master of Science
Degree level
Master's
Abstract
A multi-purpose settling column was designed to determine settling rate and sediment height allowing the in-situ measurement of yield stress and drainage without disturbing the sediment particle network. The settling column was applied to studying flocculation/densification of model oil sands tailings. A cationic temperature sensitive copolymer, poly[N-isopropylacrylamide-co-N-[3-(Dimethylamino)propyl]methacrylamide], known as CP05, containing 95 mol% NIPAM and 5 mol% DMAPMA was synthesized in-house. CP05 possess attributes of both NIPAM and DMAPMA polymers. NIPAM creates a temperature responsive feature of the copolymer exhibiting a sharp conformation transition at specific conditions (LCST), while DMAPMA provides a pH dependent cationic charge. Cycling temperatures around the CP05 LCST increased the solids mass fraction and yield stress of the sediment of model tailings flocculated by the synthesized copolymer. Polymer charge density, solubility, elasticity and conformation of CP05 were modified through the change of suspension pH and temperature, which were used to optimize flocculation efficiency and sediment rheology.
Language
English
DOI
doi:10.7939/R3T727Q2R
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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