Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1992-08-27
1994-08-02
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
252500, 252510, 60527, 60530, 524503, 524513, 524514, G21K 110
Patent
active
053346297
ABSTRACT:
A transparent polyelectrolyte fiber or gel, such as cross-linked polyacrylic acid, which contracts and expands upon the addition of an acid or base to an aqueous medium solution, is placed in the same solution with a pH dependent dye, a colored photochromatic indicator dye. The dye preferably has a pA.sub.a value that is the same as the pH at a null contraction point of the fiber. By irradiating the solution with light of a wavelength of the absorption band of either the acid or base form of the dye, the solution pH is made to change, and the fiber is made to expand or contract, depending upon the wavelength. Thus, light energy is readily converted to work energy and may be used to power a pump, for example, or an artificial muscle can be powered via an optical fiber.
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Fendelman Harvey
Guarriello John J.
Keough Thomas Glenn
Michl Paul R.
The United States of America as represented by the Secretary of
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