Abstract
Ion pair self-assembly (IPSAM) composed of poly(ethylenimine) (PEI) and (phenylthio)acetic acid (PTA) was prepared to investigate the electric field-responsive release property. PEI/PTA ion pairs were found to have an upper critical solution temperature and were air/water interface-active. IPSAM could release its payload (i.e., nile red) in proportion to the voltage. It was more sensitive to the electric field as PEI/PTA ratio was higher, and more sensitive to temperature change as the voltage was stronger. The electric field-induced protonation and oxidation were thought to be major reasons why IPSAM was responsive to the electric field in terms of release.
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More From: International Journal of Polymeric Materials and Polymeric Biomaterials
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