Increased Utility of pH Sensitive Indicators as High Concentration CO2 Detectors Through the Use of Polyelectrolyte Complexes as Stabilizing Media
Development of plastic materials which produce visible color change when exposed to different environments has recently attracted attention for many biomedical applications.1,2Many biomedical devices are packaged under high concentrations of carbon dioxide (CO2) which can lower the pH of the packagi...
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ftcwashingtonuni:oai:digitalcommons.cwu.edu:etd-2216 2023-05-15T17:51:47+02:00 Increased Utility of pH Sensitive Indicators as High Concentration CO2 Detectors Through the Use of Polyelectrolyte Complexes as Stabilizing Media Johnson, Camden James 2019-01-01T08:00:00Z application/pdf https://digitalcommons.cwu.edu/etd/1195 https://digitalcommons.cwu.edu/cgi/viewcontent.cgi?article=2216&context=etd English eng ScholarWorks@CWU https://digitalcommons.cwu.edu/etd/1195 https://digitalcommons.cwu.edu/cgi/viewcontent.cgi?article=2216&context=etd All Master's Theses polyelectrolyte complex polymer carbon dioxide detection Analytical Chemistry Inorganic Chemistry Materials Chemistry Polymer Chemistry text 2019 ftcwashingtonuni 2022-10-20T20:27:42Z Development of plastic materials which produce visible color change when exposed to different environments has recently attracted attention for many biomedical applications.1,2Many biomedical devices are packaged under high concentrations of carbon dioxide (CO2) which can lower the pH of the packaging environment. This is similar to the CO2 chemistry responsible for ocean acidification.3 Dye molecules that are sensitive to environmental changes in pH (known as pH indicators) can be encapsulated in plastics and produce a visible color change when a medical device is removed from the sterile CO2 environment. Plastics made from large molecules known as polyelectrolytes can form complexes which may serve as inexpensive and multipurpose mediums for encapsulation of pH sensitive indicators. This research aims to combine the properties of both pH indicators and polyelectrolyte complexes (PECs) to form a stable plastic which will contain indicators sensitive to CO2 environments and slowly change color over extended periods of time, increasing the durability and usefulness in many such biomedical applications. Characterization of the physical properties of indicator containing polyelectrolyte complexes (ICPECs) was performed via scanning electron microscopy (SEM) in order to determine properties such as pore size. Compositional analysis of the ICPEC was performed via attenuated total reflection infrared spectroscopy (ATR-FTIR) and simultaneous thermal analysis (STA). It was shown that ICPECs are very dependent on both internal ionic concentration and moisture content and that these factors can significantly influence the rate at which ICPECs respond to introduction to high concentration CO2 environments such as are found in many biomedical applications. Text Ocean acidification Central Washington University: ScholarWorks |
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Open Polar |
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Central Washington University: ScholarWorks |
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ftcwashingtonuni |
language |
English |
topic |
polyelectrolyte complex polymer carbon dioxide detection Analytical Chemistry Inorganic Chemistry Materials Chemistry Polymer Chemistry |
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polyelectrolyte complex polymer carbon dioxide detection Analytical Chemistry Inorganic Chemistry Materials Chemistry Polymer Chemistry Johnson, Camden James Increased Utility of pH Sensitive Indicators as High Concentration CO2 Detectors Through the Use of Polyelectrolyte Complexes as Stabilizing Media |
topic_facet |
polyelectrolyte complex polymer carbon dioxide detection Analytical Chemistry Inorganic Chemistry Materials Chemistry Polymer Chemistry |
description |
Development of plastic materials which produce visible color change when exposed to different environments has recently attracted attention for many biomedical applications.1,2Many biomedical devices are packaged under high concentrations of carbon dioxide (CO2) which can lower the pH of the packaging environment. This is similar to the CO2 chemistry responsible for ocean acidification.3 Dye molecules that are sensitive to environmental changes in pH (known as pH indicators) can be encapsulated in plastics and produce a visible color change when a medical device is removed from the sterile CO2 environment. Plastics made from large molecules known as polyelectrolytes can form complexes which may serve as inexpensive and multipurpose mediums for encapsulation of pH sensitive indicators. This research aims to combine the properties of both pH indicators and polyelectrolyte complexes (PECs) to form a stable plastic which will contain indicators sensitive to CO2 environments and slowly change color over extended periods of time, increasing the durability and usefulness in many such biomedical applications. Characterization of the physical properties of indicator containing polyelectrolyte complexes (ICPECs) was performed via scanning electron microscopy (SEM) in order to determine properties such as pore size. Compositional analysis of the ICPEC was performed via attenuated total reflection infrared spectroscopy (ATR-FTIR) and simultaneous thermal analysis (STA). It was shown that ICPECs are very dependent on both internal ionic concentration and moisture content and that these factors can significantly influence the rate at which ICPECs respond to introduction to high concentration CO2 environments such as are found in many biomedical applications. |
format |
Text |
author |
Johnson, Camden James |
author_facet |
Johnson, Camden James |
author_sort |
Johnson, Camden James |
title |
Increased Utility of pH Sensitive Indicators as High Concentration CO2 Detectors Through the Use of Polyelectrolyte Complexes as Stabilizing Media |
title_short |
Increased Utility of pH Sensitive Indicators as High Concentration CO2 Detectors Through the Use of Polyelectrolyte Complexes as Stabilizing Media |
title_full |
Increased Utility of pH Sensitive Indicators as High Concentration CO2 Detectors Through the Use of Polyelectrolyte Complexes as Stabilizing Media |
title_fullStr |
Increased Utility of pH Sensitive Indicators as High Concentration CO2 Detectors Through the Use of Polyelectrolyte Complexes as Stabilizing Media |
title_full_unstemmed |
Increased Utility of pH Sensitive Indicators as High Concentration CO2 Detectors Through the Use of Polyelectrolyte Complexes as Stabilizing Media |
title_sort |
increased utility of ph sensitive indicators as high concentration co2 detectors through the use of polyelectrolyte complexes as stabilizing media |
publisher |
ScholarWorks@CWU |
publishDate |
2019 |
url |
https://digitalcommons.cwu.edu/etd/1195 https://digitalcommons.cwu.edu/cgi/viewcontent.cgi?article=2216&context=etd |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
All Master's Theses |
op_relation |
https://digitalcommons.cwu.edu/etd/1195 https://digitalcommons.cwu.edu/cgi/viewcontent.cgi?article=2216&context=etd |
_version_ |
1766159037967106048 |