Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Entire DC Network
Mechanical And Tribological Investigation Of Thin Film Coatings Onto Flexible Polymeric Substrate, Andrea Coelho Vincent
Mechanical And Tribological Investigation Of Thin Film Coatings Onto Flexible Polymeric Substrate, Andrea Coelho Vincent
Electronic Theses and Dissertations
Elastomers of the polydimethylsiloxane family are paramount to science and engineering due to their useful properties. Much work has gone into characterizing these polymers to optimize their performance. However, at this time there is little published literature dedicated to understanding and controlling its frictional behavior.In this study, Sylgard was characterized as a function of crosslinker ratio and curing temperature, then coated with Silastic using two different techniques resulting in a bilayer. The bilayer was characterized both in bulk and surface properties, and those results compared between techniques and uncoated Sylgard.It was demonstrated that spin coating can produce a well-bonded topcoat …
Investigation Of The Viability Of Thermographic Phosphor As A Sensing Mechanism For Structural Damage In Aerogel And Pdms, Katherine Elizabeth Mitchell
Investigation Of The Viability Of Thermographic Phosphor As A Sensing Mechanism For Structural Damage In Aerogel And Pdms, Katherine Elizabeth Mitchell
Electronic Theses and Dissertations
Detecting structural damage in a material before complete failure has been a challenge with respect to material access, sensing mechanism resolution, and environmental setting, among other factors. In this work, the feasibility of using thermographic phosphors as a non-contact, instantaneous, and customizable sensing mechanism for detection of structural damage was investigated. The two materials were (1) Sylgard 184 elastomer and (2) silica aerogels. Both materials were impregnated with thermographic phosphors using different methods and tested over a wide range of temperatures. The degree of fracture in either material was gradually increased to represent a complete material failure scenario and a …
Optimization Of An Advanced Aerogel Packaging Solution For Cold-Chain Biological Materials Handling, Aaron Michael Cook
Optimization Of An Advanced Aerogel Packaging Solution For Cold-Chain Biological Materials Handling, Aaron Michael Cook
Electronic Theses and Dissertations
The thermal performance of typical insulating materials is a limiting factor in the cost effectiveness of transporting temperature sensitive, biological materials, also known as cold chain bio-logistics. Biologicals that need to be maintained at near freezing or cryogenic temperatures rely on active refrigeration systems or passive solutions, such as dewars, gel packs, dry ice, urethane foam and/or extruded polystyrene. To ensure the packages arrive at its destination and at the desired temperature, costly overnight or expedited shipping is required. Hence, an aerogel based packaging solution is proposed as a possible solution for maintaining an acceptable internal temperature range with the …