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The Synthesis and Characteristics of a Novel Hydrogel Based on Linear Polyethylenimine

Beres, Nathaniel R.
http://rave.ohiolink.edu/etdc/view?acc_num=akron1280526406

Abstract Details

2010, Doctor of Philosophy, University of Akron, Chemistry.
Hydrogels have been employed in a variety of situations because of the vast possibilities of their structures. They have been made to respond to a variety of stimuli and as such behave as intelligent materials. Linear polyethylenimine is a hydrophilic polymer at high temperatures and as the temperature decreases it becomes hydrophobic. The aim of this study was to capture this response to temperature by synthesizing a hydrogel based on linear polyethylenimine. This was done by crosslinking linear polyethylenimine with 1,4-butanediol diglycidyl ether. The resulting chemically crosslinked polymer network retained a relationship with temperature similar to that of native linear polyethylenimine, becoming more hydrophilic at higher temperatures while becoming hydrophobic at low temperatures. The crosslinked linear polyethylenimine was then modified to contain 2-hydroxypropyl pendent chains. In response to solvent temperature the resulting hydrogel exhibited negative temperature-sensitive swelling behavior, meaning the hydrogel swells at low temperatures (hydrophilic) and contracts at high temperatures (hydrophobic). The hydrogel also responds to the presence of salts and changes in the solvent pH. These characteristics allow the hydrogel to respond to two different external stimuli making it an important area of research.
Daniel Smith, Dr. (Advisor)
158 p.
HYDROGEL; swelling; XLPN2HPEI; polymer; crosslinked; crosslinked linear; Poly

Recommended Citations

Citations

  • Beres, N. R. (2010). The Synthesis and Characteristics of a Novel Hydrogel Based on Linear Polyethylenimine [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1280526406

    APA Style (7th edition)

  • Beres, Nathaniel. The Synthesis and Characteristics of a Novel Hydrogel Based on Linear Polyethylenimine. 2010. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1280526406.

    MLA Style (8th edition)

  • Beres, Nathaniel. "The Synthesis and Characteristics of a Novel Hydrogel Based on Linear Polyethylenimine." Doctoral dissertation, University of Akron, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1280526406

    Chicago Manual of Style (17th edition)

akron1280526406
939
© 2010, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.