Conversion of Chemical into Mechanical Energy by Synsthetic Polymer Gels (Chemomechanical System)
System which undergoes shape change and develop contractile force responsing to outside stimulus is called “Chemomechanical (or Mechanochemical) System” 1) and refers to thermodynamic systems capable of transforming chemical energy directly into mechanical work or conversely of transforming mechanical into chemical potential energy2). The isothermal conversion of chemical energy into mechanical work underlies the motility of all living organisms and can easily be seen, for instance, in muscle, flagella and ciliary movement. All these biological systems are characterized by an extremely high efficiency of energy conversion. The high efficiency of the biological systems is largely due to direct conversion of chemical energy without unnecessary intermediate passes producing heat.
KeywordsDrug Delivery System Electric Stimulus Electrokinetic Process Develop Drug Delivery System Isothermal Conversion
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- 1).Mechanochemical (chemomechanical) system is well known as a model converting chemical into mechanical energy and a variety of systems have been reported. The system developed by us is considered as a prototype model of a chemomechanical (mechanochemica1) system operated under electric similus. We prefer the term “chemomechanical reaction,” “chemomechanical system” instead of “mechanochemical” proposed by A. Katchalsky to give more precise difinition and to avoid a confusion with other terminology. Note that Mechanochemical reaction often refers to chemical reaction induced by mechanical stress fracture and dumpling to give radical and crosslinking formation. Y.Osada, Adv.Polymr Sci., 82, 1(1987)]CrossRefGoogle Scholar
- 2).Transformation from mechanical into chemical energy may be envisaged in which the application of mechanical energy may rise the chemical potential of substance and permit its transfer from a reservoir of a lower chemical potential to a reservoir of higher potential (reverse chemomechanical system). Details are given in Y. Osada, Adv. Polym. Sci., 82, 1, springer-Ver1ag, Heidelberg, 1987.CrossRefGoogle Scholar
- 4).Y. Osada, M. Hasebe, Chem. Lett., 1985, 1285.Google Scholar
- 9).R. Kishi, M. Hasebe, M. Hara and Y. Osada, Polymer for advanced Technologies, 1, (1990).Google Scholar
- 12).Y. Osada, R. Kishi, Y. Yasunaga and K. Sawahata,Google Scholar
- 14).R. Kishi, M. Sisido and S. Tazuke, Polymer Preprints, Japan, 38, 3859, (1989).Google Scholar
- 14a).R. Kishi, M. Sisido and S. Tazuke, Polymer Preprints, Japan, 38, 3862(1989).Google Scholar
- 15).K. Umezawa and Y. Osada, Chem. Lett., 187, 1795.Google Scholar