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Photocuring epoxy with quantum dots for 3D printing

Title:

Photocuring epoxy with quantum dots for 3D printing

Riad, Keroles B. (2016) Photocuring epoxy with quantum dots for 3D printing. Masters thesis, Concordia University.

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Abstract

3D printing is the future of manufacturing, limited by material development. Stereolithography is an ideal 3D printing process as it is energy efficient, accurate, fast and capable of forming composite materials. The photocuring of polymers used in this process is integral to society via more applications such as dentistry, coating, and printed circuit boards. However, those photosensitive materials are unstable in daylight during end use limiting their viability for making functional parts in many applications, motivating our work. The ultimate goal is to photocure only with light outside of the solar spectrum on Earth in stereolithography 3D printing, which motivates this work, to produce photostable parts.
While semiconducting nanoparticles have previously been shown to photocure acrylic resins via a free radical mechanism, here we demonstrate, for the first time, that semiconducting nanoparticles are capable of photocuring epoxy cationically. This result is critical because with that achieved, the quantized effect can be used to increase the band gap energy of the nanoparticles to only be sensitive to light outside of the solar spectrum on Earth.
We study both bulk and quantized nanoparticles, propose a reaction mechanism supported by experimental observations, and explore the effects of process variables on the kinetics of the reaction. The intertwining of the engineering of the application, the chemistry of the reactions and the physics of quantum dots makes this thesis a truly rich, interdisciplinary study.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical and Industrial Engineering
Concordia University > Research Units > Concordia Centre for Composites
Concordia University > School of Graduate Studies > Individualized Program
Item Type:Thesis (Masters)
Authors:Riad, Keroles B.
Institution:Concordia University
Degree Name:M. Sc.
Program:Individualized Program
Date:10 February 2016
Thesis Supervisor(s):Wood-Adams, Paula and Claverie, Jerome and Wuthrich, Rolf
Digital Object Identifier (DOI):10.11573/spectrum.library.concordia.ca.00980875
Keywords:3D printing, Stereolithography, Photocuring, Quantum dots.
ID Code:980875
Deposited By: KEROLES RIAD
Deposited On:31 May 2016 19:30
Last Modified:18 Jan 2018 17:52
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