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Articles 1 - 6 of 6
Full-Text Articles in Chemical Engineering
Teflon Replacement In Pans, Teodora Neamtu
Teflon Replacement In Pans, Teodora Neamtu
Williams Honors College, Honors Research Projects
The purpose of the project is to determine an optimal prepping method of common cooking oils for pans that will be as effective as Teflon non-stick pans. The reason for this is to replace Teflon coating in pans, which can be very toxic for humans and the environment. Teflon has been a common coating for non-stick surfaces that is useful when cooking things such as eggs. To determine an optimal cooking method, three different oils were used: olive oil, vegetable oil, and shortening. The oils were tested on an aluminum pan by cooking egg whites at various temperatures, cooking times, …
Study Guide Generation In Chemical Engineering Thermodynamics: A Comparison Between Individual And Group Preparation, William Brown
Study Guide Generation In Chemical Engineering Thermodynamics: A Comparison Between Individual And Group Preparation, William Brown
Williams Honors College, Honors Research Projects
Thermodynamics is an essential course in the chemical engineering curriculum. Thermodynamics requires the use of many equations and rules that use subtle concepts from math, physics, and chemistry. To assist students with using these equations and recalling rules on exams, students are often permitted a “study guide” to use on the exams to help avoid rote memorization. Study guide construction is an environment in which students learn, and learning has been shown to improve when collaboration is involved. In this research, students will construct study guides individually for one exam, and in teams for one exam. Students will answer questions …
Testing The Effectiveness Of Various Fabrics For Use In Protective Face Coverings, Isaac Daley
Testing The Effectiveness Of Various Fabrics For Use In Protective Face Coverings, Isaac Daley
Williams Honors College, Honors Research Projects
Facemask requirements have been heavily implemented as a result of the COVID-19 pandemic. The purpose of this study was to test various fabrics that could be used in face coverings and determine which materials are best for reducing virus transmission rates. Of the seven fabrics tested, five were conventional home-use fabrics and the other two were surfaces modified with hydrophobic organosilanes. Wettability and droplet adherence tests were performed on each material. The materials that performed the best were decyltrichlorosilane (DTS) modified cotton, perfluorotrichlorosilane (FTS) modified cotton, and polyester. Contact angles for water droplets on these fabrics were 106°, 93°, and …
Effects Of Hofmeister Ions On Transition Temperature Of Two Thermo-Responsive Polymers, Joshua Moser
Effects Of Hofmeister Ions On Transition Temperature Of Two Thermo-Responsive Polymers, Joshua Moser
Williams Honors College, Honors Research Projects
It was hypothesized that through the use of Hofmeister Ions, the lower critical solution temperature (LCST) of poly(vinyl methyl ether) (PVME) and poly(ethylene glycol)- poly(N-isopropylacrylamide) (PEG-b-pNIPAAm) block-copolymer could be controlled. Through literature searches and small lab experiments, our team found that there may be a connection between Hofmeister effects and phase transition of a thermo-responsive polymer. To try and prove this, the lab team decided to take four cations (Mg2+,Na+, Cs+, K+) in solution with the thermo-responsive polymers and compared their LCST to solutions of the thermo-responsive polymer in de-ionized …
Form Stable Phase-Change Materials, Russell Dent, Marjan Kashfipour, Nitin Mehra, Jiahua Zhu
Form Stable Phase-Change Materials, Russell Dent, Marjan Kashfipour, Nitin Mehra, Jiahua Zhu
Williams Honors College, Honors Research Projects
This work investigates the use of two different polyols, xylitol (Xyl) and erythritol (Ery), in conjunction with boron nitride (BN) aerogels, for the purpose of creating thermally conductive composites. While the BN filler in Xyl composites achieved a high anisotropic thermal conductivity of up to 4.53 W/m-K at 18.2 weight percent filler loading, they do not exhibit good phase-change material qualities due to a low solidification enthalpy even at low cooling rates. Alternatively, the BN-Ery composites have shown promising results with a solidification enthalpy of 225.14 J/g and a melting enthalpy of 385.84 J/g at a heat rate of 5 …
Prediction Of Vapor/Liquid Equilibrium Behavior From Quantum Mechanical Data, Marshall J. Gnap
Prediction Of Vapor/Liquid Equilibrium Behavior From Quantum Mechanical Data, Marshall J. Gnap
Williams Honors College, Honors Research Projects
MOSCED (Modified Separation of Cohesive Energy Density) is a particularly attractive model for activity coefficients because it offers intuitive insights into how to tune solvent-solute interactions to achieve optimized formulations. Unfortunately, only 133 compounds have been characterized with the MOSCED method. Furthermore, there is no convenient method for extending MOSCED predictions to new compounds. The hypothesis of the present research is that the surface charge density of a molecule, once normalized over the molecule surface area, provided graphically by a σ-profile from density functional theory (DFT) computations, can be used to estimate the parameters used in the MOSCED model. DFT …