Electrolytically Activated Contractile Polymer

摘要: FOR several years it has been known that certain types of polymers, ‘chemical muscles’, change dimensions depending on their chemical environment1. A typical one is prepared as a co-polymer polyvinyl alcohol (PVA) and polyacrylic acid (PAA)2. This polymer swells or shrinks osmotically the total ionic concentration inside polymer. determined primarily by degree ionization weak carboxylic groups. When external solution acidic dissociation low shrinks. In alkaline expands. referred to ‘pH muscle’2.