Expanding-contracting hydrogel composite and process for...

Details Expanding-contracting hydrogel composite and process for... Expanding-contracting hydrogel composite and process for...

C - Chemistry, Metallurgy

08

J

400/3077, 134/53

C08J 3/07 (2006.01) C08J 3/09 (2006.01) C08L 29/04 (2006.01) C08L 33/02 (2006.01)

Patent

CA 1300792

EXPANDING-CONTRACTING HYDROGEL COMPOSITE AND PROCESS FOR PREPARATION THEREOF ABSTRACT OF THE DISCLOSURE A process is provided for the preparation of expanding-contracting hydrogel composites which process comprises the steps of adding solid particles of a poly- electrolyte to a polyvinyl alcohol solution and subjecting the mixture to a low temperature treatment to cause gelation of the polyvinyl alcohol with the polyelectrolyte dispersed as a heterogeneous phase (i.e. solid particles) within the polyvinyl alcohol gel. Hydrogel composites made by the process exhibit high strength and a capacity to expand and contract over a wide range with changes in environment. These composites have utility as mechanical devices such as artificial muscle or other devices which are capable of converting electrical or chemical energy to mechanical energy.

579153

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