Designing for advanced materials by the deltaTt-mechanism

Dan W. Urry; Larry C. Hayes; Shao Qing Peng

doi:10.1117/12.232162

9 February 1996 Designing for advanced materials by the ΔT_t-mechanism

Dan W. Urry, Larry C. Hayes, Shao Qing Peng

Proceedings Volume 2716, Smart Structures and Materials 1996: Smart Materials Technologies and Biomimetics; (1996) https://doi.org/10.1117/12.232162
Event: 1996 Symposium on Smart Structures and Materials, 1996, San Diego, CA, United States

Abstract

Smart functions in biological systems are discussed from the perspective of the temperature at which inverse transitions of hydrophobic folding and assembly occur in response to increases in the temperature. The design of advanced materials is demonstrated in terms of the capacity to control the temperature, T_t, at which the inverse temperature transitions occur by controlling polymer hydrophobicity and by utilizing an associated hydrophobic-induced pKa shift. A smart material is recognized as one in which the material is responsive to the particular variable of interest, to the particular change in the variable that is required, and under the required conditions of temperature, pH, pressure, etc. By the proper design of the polymer, it is demonstrated that two distinguishable smart functions can be coupled such that an energy input that alters one function causes a change in the second function as an output. To become coupled the two distinguishable functions need to be part of the same hydrophobic folding domain. By way of example, a protein-based polymer was designed to carry out the conversion of electrochemical energy to chemical energy, i.e., electro-chemical transduction, under specified conditions of temperature and pH. This design approach utilizes the (Delta) T_t-mechanism of free energy transduction.

Citation Download Citation

Dan W. Urry, Larry C. Hayes, and Shao Qing Peng "Designing for advanced materials by the ΔT_t-mechanism", Proc. SPIE 2716, Smart Structures and Materials 1996: Smart Materials Technologies and Biomimetics, (9 February 1996); https://doi.org/10.1117/12.232162

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