Chemical Engineering, Department of
The Department of Chemical Engineering combines the study of mathematics, chemistry, physics and biology, with engineering science, design, and economics. Students at the Department learn how to design safe, efficient, environmentally-friendly, sustainable and economical processes and products.
This community includes research outputs produced by faculty and students. Submitting works to QSpace may enable compliance with the Tri-Agency Open Access Policy on Publications.
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Evaluation of a Novel Polymeric Flocculant for Enhanced Water Recovery of Mature Fine Tailings
This thesis explores the feasibility of using a novel degradable cationic flocculant, poly(PLA4ChMA), for enhanced dewatering of mature fine tailings (MFT). Previous research indicated that this material provided improved ... -
Fabrication and characterization of a coplanar nickel-metal hydride microbattery equipped with a gel electrolyte
(Elsevier BV, 2019-02-28)The growing utilization of portable and autonomous micro devices results in a need for novel integrated power supplies with low power densities and energy contents. We report on a rechargeable thin-film microbattery which ... -
Structure of the Electrical Double Layer Revisited: Electrode Capacitance in Aqueous Solutions
(American Chemical Society (ACS), 2020-04-28)The structure of the electrical double layer at the interface of planar electrodes and aqueous solutions is investigated. Electrical impedance spectroscopy is used to measure the impedance of aqueous solutions of sodium ... -
Electrochemical investigation and modelling of LaNi4.77Al0.23 thin-films sputtered on glass wafers
(Elsevier BV, 2019-01-25)In the present work, we report on the microfabrication of metal hydride thin-film electrodes which can be utilized for rechargeable microbatteries or sensor applications. A multi-layer deposition technique is developed ... -
Charge and Electrical Double Layer Formation in a Nonpolar Solvent Using a Nonionic Surfactant
(American Chemical Society (ACS), 2020-05-19)In this work, we study the charge formation and the characteristics of the electrical double layer in a nonpolar medium using electrical impedance spectroscopy. To stabilize the free ionic species, a nonionic surfactant ... -
Direct writing of liquids by micro dispensing: Stability and shape of laminar jets with high Froude numbers
(Elsevier BV, 2020-02-01)Nowadays, a wide range of industrial manufacturing processes require high precision for product manufacturing. Micro dispensing is concerned with jetting of liquids through nozzles with a typical diameter on the order of ... -
Bonding Nafion® with polydimethysiloxane: A versatile approach towards ion-exchange membrane microfluidic devices
(Elsevier BV, 2017-09-01)Polydimethylsiloxane (PDMS) is one of the most widely used materials for the fabrication of microfluidic devices. The uncomplicated integration of ion-exchange membranes, such as Nafion®, would facilitate manifold ... -
Zeta Potential of Poly(methyl methacrylate) (PMMA) in Contact with Aqueous Electrolyte–Surfactant Solutions
(American Chemical Society (ACS), 2017-10-10)The addition of surfactants can considerably impact the electrical characteristics of an interface, and the zeta potential measurement is the standard method for its characterization. In this article, a comprehensive study ... -
Printing of graphene supercapacitors with enhanced capacitances induced by a leavening agent
(Elsevier BV, 2020-04-01)The excellent electrical and mechanical properties of graphene make it a promising electrode material for energy storage devices such as supercapacitors. However, graphene flakes tend to restack upon processing which lowers ... -
The influence of a DC electric field on the von Kármán vortex street in the wake of a confined cylinder
(Wiley, 2017)We investigate the influence of a DC electric field on the flow around and in the wake of a confined cylinder by means of numerical simulations. Our results indicate that even very small electrical perturbations have ... -
Dielectric relaxation spectroscopy of aqueous micellar electrolyte solutions: A novel application to infer Dukhin number and zeta potential of a micelle
(Wiley, 2019)The complex permittivities of aqueous SDS solutions, with and without the addition of sodium chloride (NaCl), are measured in the frequency range from 200 MHz to 14 GHz. The SDS concentrations are chosen such that the SDS ... -
A rechargeable zinc copper battery using a selective cation exchange membrane
(Elsevier BV, 2020-03-31)The Daniell cell (zinc copper battery) was only used as primary cell due to the copper ion crossover preventing its ability to be stored and recharged. We modify the classic design and introduce a cation exchange membrane ... -
A sugar-template manufacturing method for microsystem ion-exchange membranes
(IOP Publishing, 2017-06)In this work, we report on a novel method for producing ion-exchange membranes that can be integrated directly into polydimethylsiloxane-based micro devices. Ionomers such as NafionTM, a copolymer with high conductivity ... -
Accelerated Monte-Carlo Techniques for Modeling of Chain Architecture and Semi-Batch Radical Polymerization Process Optimization
This thesis introduces a new strategy to develop a comprehensive stochastic polymerization simulation with the capacity of considering the secondary reactions attributed to the radical acrylate/methacrylate/styrene ... -
Large-Amplitude Oscillatory Shear Flow Loops for Long-Chain Branching From General Rigid Bead-Rod Theory
(2020-04)General rigid bead-rod theory [Hassager, J Chem Phys, 60, 4001 (1974)] explains polymer viscoelasticity from macromolecular orientation. By means of this theory, we relate the complex viscosity of polymeric liquids to the ... -
Van Gurp-Palmen Relations for Long-Chain Branching From General Rigid Bead-Rod Theory
(2020-02)Empirically, we find that parametric plots of mechanical loss angle versus complex shear modulus may depend neither on temperature [van Gurp and Palmen, Rheol Bull (SoR), 67, 5 (1998)], nor on average molecular weight ... -
Polymer Branching and First Normal Stress Differences in Small-Amplitude Oscillatory Shear Flow
(2019-11)General rigid bead-rod theory [Hassager, J Chem Phys, 60, 4001 (1974)] explains polymer viscoelasticity from macromolecular orientation. By means of general rigid bead-rod theory, we relate the normal stress differences ... -
A Novel Flexible Hybrid Battery–Supercapacitor Based on a Self‐Assembled Vanadium‐Graphene Hydrogel
(Wiley, 2020-03-23)A novel flexible hybrid battery–supercapacitor device is proposed consisting of high specific surface area electrodes paired with an electrolyte, which contains a redox species that can exist in more than two oxidation ... -
An Improved Model for Polyether Production from 1,3‐Propanediol
(Wiley, 2020-02-13)A dynamic mathematical model is developed for production of Cerenol polyether from 1,3‐propanediol in a batch reactor system. The model accounts for polycondensation reactions and side reactions in the liquid phase and for ... -
Fabrication of novel power sources for portable and wearable devices
Practical applications of portable and wearable electronics is linked with the development of power sources that address the physical requirements of these electronic devices, such as flexibility and a small footprint. In ...
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