Samira Aslanzadeh

Samira Aslanzadeh
University of Toronto | U of T · Department of Mechanical and Industrial Engineering

PhD

About

20
Publications
2,966
Reads
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240
Citations
Additional affiliations
December 2017 - present
University of Toronto
Position
  • PostDoc Position
October 2014 - November 2017
University of Alberta
Position
  • PostDoc Position
September 2012 - June 2014
Standard Research Institute
Position
  • Professor (Assistant)

Publications

Publications (20)
Article
The current study presents low cost 3D printed materials with desired electrical charactrestics for RF/microwave applications. In contrast to the traditional manufacturing techniques of fabrication in electronics, additive manufacturing (AM) is a proper technology for making parts with more advanced complex features. The applications of AM in RF/mi...
Article
The effects of fiber structure on the process of photodegradation are controversial in the field. We tested polypropylene fibers of various form for their effects on photodegradation. Fiber grade polypropylene granules were spun into partially oriented multifilament yarns at a spinning speed of 2000 m min−1. The yarns were drawn using a draw-twist...
Article
In this study, a sulfur-free softwood lignin (SFSL) was electrospun to form bead-free fibers. The fibers were evaluated as potential precursors for carbon fiber production. Higher heating rates of thermo-stabilization caused afused fiber morphology. The lignin purification process also affected the quality of the SFSL-based carbon fibers. Therefore...
Article
This article reports the studies of photo-oxidative behaviour of polypropylene/maleic anhydride-grafted polypropylene/organic modified montmorillonite (PP/PPgMA/OMMT) composites prepared by two different melt processing methods. Samples of pristine polypropylene (PP) and PP/PPgMA/OMMT composites were prepared in an internal mixer and in a twin scre...
Article
Samples of thermal bonded polypropylene non-woven fabrics were exposed to light from two TUV 30W G30T8 Philips lamps (λ = 253.7 nm) in a covered open-air chamber at room temperature (25 °C and 55% relative humidity) for different periods of time. In order to determine the state of degradation, the samples were examined by optical microscopy, scanni...
Article
Cellulose nanocrystals (CNCs) with high specific surface area, crystallinity, aspect ratio with unique rod-like shapes, elastic modulus and tensile strength are an excellent additive which can be used for the preparation of unique polymer/nanoparticle fiber composites from polymer solutions by electrospinning. Research on electrospinning as a techn...
Article
This paper presents a low-cost multi-layered electrically-small dielectric lens for improving the maximum radiation gain and side-lobe-level (SLL) for a directive antenna such as a horn antenna utilizing a new additive manufacturing filling technique. For obtaining the best performance of such a lens, the variation of the dielectric constant of out...
Conference Paper
A low-cost electrically-small dielectric lens for improving the maximum radiation gain of an aperture antenna utilizing a new additive manufacturing filling technique is presented in this paper. The required dielectric constants for an electrically small lens are obtained through optimization in simulation software. Utilizing this filling method, a...
Article
This paper evaluates a one-staged additive manufacturing (AM) of 3D frequency selective surfaces (FSS) using continuous carbon fiber reinforced thermoplastic (CFRTP) as the conductor material and Nylon 6 (polyamide 6) as the foundation. The details of the FSS design and 3D printing conditions are presented. The effects of conductivity and thickness...
Article
Full-text available
Different structures for three categories of the TM01-TE11 mode converters; i.e. dielectric loaded based, metallic septum based, and mode converter with intermediate modes; are proposed and investigated for the aim of wider operational bandwidth. The principles of operation of all mode converters are explained in detail. Thanks to 3D printing capab...
Article
Full-text available
Extrusion-based additive manufacturing (EBAM) or 3D printing is used to produce customized prototyped parts. The majority of the polymers used with EBAM show moisture sensitivity. However, moisture effects become more pronounced in polymers used for critical applications, such as biomedical stents, sensors, and actuators. The effects of moisture on...
Article
Shape memory materials are an innovative type of materials that reversibly store a temporary shape and recover back to the original dimensions with the application of an external mechanism such as heat. Shape memory polymers (SMP), specifically thermoplastic SMP (e.g. shape memory polyurethane (SMPU)) have received much attention during the past de...
Article
The effects of polyethylene oxide (PEO) molecular weight (Mv), and volume fraction ( ) on the morphology of electrospun sulfur free softwood lignin nanofibers were investigated. Small amounts of PEO were used during preparations of the solutions to aid the electrospinning process. It was found that tripling the PEO volume fraction resulted in a tra...
Article
Electrospinning of sulfur-free softwood lignin (SFSL) in N,N-dimethylformamide (DMF) is reported as is and with poly(ethylene oxide) (PEO). SFSL macromolecules behave as rigid spheres, instead of free draining macromolecules in DMF. Hence they are investigated as colloids. Colloidal SFSL generates uniform fibers only at the volume fraction of 0.63....
Article
The photo-oxidation behaviour of polypropylene/maleic anhydride-grafted polypropylene/organic modified montmorillonite (PP/PPgMA/OMMT) composites with short wavelength (UVC) and long wavelength (UVA) ultraviolet radiation was examined. The samples were prepared in a co-rotating twin-screw extruder and compatibilizers with different degrees of malea...
Article
Photo-oxidative degradation of polypropylene/clay multifilament yarns containing different amounts of clay was investigated. These samples and pure polypropylene (PP) multifilametns were exposed to long wavelength radiations (λ> 300 nm) under atmospheric condition of constant temperature and relative humidity. The photo-oxidative stability was stud...
Article
Polypropylene (PP)/Montmorillonite (MMT) nanoclay based composite was prepared by melt compounding with maleic anhydride grafted polypropylene (MA-g-PP) in a twin screw extruder and an internal mixer. Test specimens were prepared by compression molding. Mechanical properties such as tensile modulus, tensile strength and maximum percent strain were...
Chapter
Polypropylene (PP)/Montmorillonite (MMT) nanoclay based composite was prepared by melt compounding with maleic anhydride grafted polypropylene (MA-g-PP) in a twin screw extruder and an internal mixer. Test specimens were prepared by compression molding. Mechanical properties such as tensile modulus, tensile strength and maximum percent strain were...
Article
Polypropylene fibers were exposed to short wavelength radiations (λ=253.7 nm). The samples were analyzed by microscopy, staining, FTIR spectroscopy, tensile testing, and X-ray diffraction. The short-wavelength UV irradiation produces much more reactive radicals such as peroxy and alkoxy groups, which speeds up the photo-oxidation process. The produ...
Conference Paper
Full-text available
Animal fibers have variety in their longitudinal sections. The main difference of the longitudinal section of these fibers is the geometry and dimension of scale patterns, which with attention to one of the physical fiber detection, one can inspect longitudinal section of fiber images, which determine the fiber characteristics. The method of the de...

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