3 Result(s)

Optimizing extrusion parameters for stretchable fibers and wearable sensors

The Koh Lab has recently completed a custom-built mini extruder for making thermoplastic elastomer fibers. With this extruder, we can make stretchable fibers either as 3D printing substrates or as dielectric materials for wearable pressure sensors. In order to optimize the fibers we will explore various metal and ceramic fillers and loadings. The student part of this project will not only optimize the parameters needed to optimally extrude fibers with varying thicknesses but will also learn to characterize the mechanical and electrical properties of the fibers and thermoplastic materials independently as well as, ideally, in a stretchable device....

Required Availability
Fall 2022
Course Credit?
Yes - CHE498
Paid Position?
No

Developing capacitive pressure sensors for the capture of breath information via voice and instrument

The Koh Lab has a significant depth of experience creating novel dielectric materials for capacitive pressure sensors. So far, our work has focused on high loads such as those you may expect under the foot from walking. In this project, we look to expand our usage of capacitive pressure sensors to capture information about breath in two unique ways. First, we will put capacitive pressure sensors in instruments to record pressure changes from the vibrations caused by breathing. Second, we will develop pressure sensors to be worn on the torso to quantify breathing patterns of vocal students in order to better quantify the methods needed to properly control breath with the long term goal of developing training programs for at home therapy ...

Required Availability
Fall 2022
Course Credit?
Yes - CHE498
Paid Position?
No

Evaluating Novel Surfactants for High Internal Phase Emulsion Polymer Foams as Water Treatment Technology

The Koh Lab is currently working on developing new surfactants with a variety of different structures to create high internal phase emulsion polymer foams (pHIPE). With this library of surfactants we need to characterizing interfacial tension and then utilize the highest performing surfactant to create adsorbent foams. This project will involve the fundamental characterization of the surfactants, with the additional project of building a suitable enclosure for the instrument, as well as the creation of pHIPE. Final aspects of this project will be the validation of adsorbency of the pHIPE using simple contaminants....

Required Availability
Fall 2022
Course Credit?
Yes - CHE498
Paid Position?
No
Preferred Majors
Chemical Engineering | Chemistry
Faculty
Amanda Koh