Tunable wettability of microstructured polypyrrole films
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2011
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| Online Access: | http://hdl.handle.net/1721.1/62526 |
| _version_ | 1811079635705790464 |
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| author | Chang, Jean H |
| author2 | Ian W. Hunter. |
| author_facet | Ian W. Hunter. Chang, Jean H |
| author_sort | Chang, Jean H |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010. |
| first_indexed | 2024-09-23T11:18:11Z |
| format | Thesis |
| id | mit-1721.1/62526 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T11:18:11Z |
| publishDate | 2011 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/625262019-04-10T18:34:07Z Tunable wettability of microstructured polypyrrole films Chang, Jean H Ian W. Hunter. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Mechanical Engineering. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010. Cataloged from PDF version of thesis. Includes bibliographical references (p. 85-90). This thesis presents the development of the conducting polymer polypyrrole as a viable material for applications requiring switchable wettability. A fabrication procedure that produces robust microstructured polypyrrole (PPy) that quickly and reversibly switches between the superhydrophobic and superhydrophilic states is discussed. The polymer is doped with perfluorooctanesulfonate ions which diffuse in and out of the film upon an electric stimulus, causing a change in the material's surface energy. The effect of changing different deposition parameters on the switchable wettability of the polymer is also investigated. A post-deposition thermal treatment that improves the electrochemical properties of polypyrrole is presented. Finally, a device that allows for the in situ wettability switch of PPy is developed, eliminating the need for polypyrrole to be immersed in an electrolyte in order to switch between wetting states. A wettability gradient created on the surface of PPy using the device is used to demonstrate a possible application requiring induced fluid movement. Electrochemical techniques are used to synthesize and characterize the polymers, and scanning electron microscopy is used to examine the surface morphology of the films. by Jean H. Chang. S.M. 2011-04-25T16:13:46Z 2011-04-25T16:13:46Z 2010 2010 Thesis http://hdl.handle.net/1721.1/62526 712919198 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 90 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Chang, Jean H Tunable wettability of microstructured polypyrrole films |
| title | Tunable wettability of microstructured polypyrrole films |
| title_full | Tunable wettability of microstructured polypyrrole films |
| title_fullStr | Tunable wettability of microstructured polypyrrole films |
| title_full_unstemmed | Tunable wettability of microstructured polypyrrole films |
| title_short | Tunable wettability of microstructured polypyrrole films |
| title_sort | tunable wettability of microstructured polypyrrole films |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/62526 |
| work_keys_str_mv | AT changjeanh tunablewettabilityofmicrostructuredpolypyrrolefilms |