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Investigation of the Relationships Between the Thermodynamic Phase Behavior and Gelation Behavior of a Series of Tripodal Trisamide Compounds

Feng, Li
http://rave.ohiolink.edu/etdc/view?acc_num=akron1342461003

Abstract Details

2012, Doctor of Philosophy, University of Akron, Polymer Engineering.
Low molecular weight organic gelators(LMOGs) are important due to potential applications in many fields. Currently, most of the major studies focus on the empirical explanation of the crystallization for gelator assembly formation and morphologies, few efforts have been devoted to the thermodynamic phase behaviors and the effect of the non-ideal solution behavior on the structure of the resultant gels. In this research, tripodal trisamide compounds, synthesized from tris(2-aminoethyl)amine (TREN) by condensation with different acid chlorides, were studied as model LMOGs due to the simple one-step reaction and the commercially available chemical reactants. Gelation of organic solvents was investigated as a function of concentration and solvent solubility parameter.It has been found that the introduction of branches or cyclic units have dramatically improves the gelation ability compared to linear alkyl peripheral units. Fitting the liquidus lines using the regular solution model and calculation of the trisamide solubility parameter using solubility parameter theory gave good agreement with the trisamide solubility parameter calculated by group contribution methods. These results demonstrate that non-ideal solution behavior is an important factor in the gelation behavior of low molecular mass organic gelators. Understanding and controlling the thermodynamics and phase behaviors of the gel systems will provide effective ways to produce new efficient LMOGs in the future.
Kevin Cavicchi, Dr. (Advisor)
Thein Kyu, Dr. (Committee Member)
Mesfin Tsige, Dr. (Committee Member)
Matthew Espe, Dr. (Committee Member)
Avraam Isayev, Dr. (Committee Member)

Recommended Citations

Citations

  • Feng, L. (2012). Investigation of the Relationships Between the Thermodynamic Phase Behavior and Gelation Behavior of a Series of Tripodal Trisamide Compounds [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1342461003

    APA Style (7th edition)

  • Feng, Li. Investigation of the Relationships Between the Thermodynamic Phase Behavior and Gelation Behavior of a Series of Tripodal Trisamide Compounds. 2012. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1342461003.

    MLA Style (8th edition)

  • Feng, Li. "Investigation of the Relationships Between the Thermodynamic Phase Behavior and Gelation Behavior of a Series of Tripodal Trisamide Compounds." Doctoral dissertation, University of Akron, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1342461003

    Chicago Manual of Style (17th edition)

akron1342461003
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© 2012, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.