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Permanent link (DOI): https://doi.org/10.7939/R34746X2K

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Fundamental Study on Novel Synthetic Polymer Systems for Fine Particles Settling Open Access

Descriptions

Other title
Subject/Keyword
multiple responsive
polymerization
eco-friendly
settling
kaolin
flocculation
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Lu, Han
Supervisor and department
Hong, Zeng (Department of Chemical and Materials Engineering)
Ravin, Narain (Department of Chemical and Materials Engineering)
Examining committee member and department
Hong, Zeng (Department of Chemical and Materials Engineering)
Zukui, Li (Department of Chemical and Materials Engineering)
Ravin, Narain (Department of Chemical and Materials Engineering)
Hao, Zhang (Department of Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2016-01-05T15:21:21Z
Graduation date
2016-06
Degree
Master of Science
Degree level
Master's
Abstract
In this study, Random copolymers poly[(2-aminoehtyl methacrylamide hydrochloride)-st-(5-methacrylamido-1,2-benzoboroxole)-st-(N-isopropylacrylamide)] (PAMN) and glycopolymer poly (2-lactobionamidoethylmethacrylamide) (PLAEMA) with various molecular weights were synthesized via conventional free radical polymerization method. The effect of temperature, pH, molecular weight and polymer dosage on the kaolin particle settling rate, turbidity of supernatant, mud-line position, solid volume fraction of sediment, and solid content of sediment were evaluated to determine the flocculation performance. Temperature and pH responsive polymer PAMN was considered as the most efficient flocculant as compared with poly[(2-aminoethyl methacrylamide hydrochloride)-st-(N-isopropylacrylamide)] (PAN) and Poly(N-isopropylacrylamide) (PNIPAAm). Furthermore, highly compact sediment can be achieved through increasing pH to 11 due to the cationic/anionic transfer property of PAMN. For the study of PLAEMA, large molecular weight has been proved to possess the positive effect on flocculating kaolin fine particles. The adhesive force, polymer conformation, and other property characterization were determined by several instruments, including surface forces apparatus (SFA), atomic force microscopy (AFM), dynamic light scattering (DLS), and gel permeation chromatography (GPC). Strong adhesion was measured between mica surface and polymers in the case of PAMN and high molecular weight PLAEMA, resulting from benzoboroxole-hydroxyl complexation, electrostatic interaction, hydrogen bonding and flexible polymer chains. The roughness change of polymer coated mica surface is also an evidence of polymer adsorption and aggregation, contributing to the enhanced flocculation behavior. The results in this thesis provide insight into the development of novel polymer flocculants and basic interaction mechanisms between polymer flocculants and fine particles.
Language
English
DOI
doi:10.7939/R34746X2K
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
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Last modified: 2016:06:16 17:13:39-06:00
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