| Summary: | 碩士 === 國立臺北科技大學 === 化學工程研究所 === 95 === Polychloromethylstyrene, PCMS, macro-initiators were synthesized by a stable free radical polymerizations in the presence of 2,2’,6,6’-teramethyl-1-piperidinyloxy (TEMPO) and benzoyl peroxide initiator (BPO); then the TEMPO-capped PCMS were extended by polymerization with styrene monomers to synthesize PCMS-b-PS block copolymers. The PCMS and block copolymers were further modified by nicotinamide to prepare quaternized PCMS, q-PCMS, and q-PCMS-b-PS block copolymers; then functional particles will be formed. The particle size can be varied with redox reagent. Adding reductant into the solution with the functional particles results in precipitate. The polymers were further blended with PVA solution, and the mixture was cast on a screen-printed electrode (SPE) and dried to form a modified electrode. The contact angle of a drop with oxidant or reductant by the film was observed by an optical microscope. It was found that the contact angle depends on the oxidant and reduced state of the drop. It shows a better wetting property on the modified PVA film for the reduced state than that of oxidant rate of drop. The oxidoreduction property of the film made of the q-PCMS-b-PS block copolymers is more sensitive than that of q-PCMS homopolymers. Cyclic voltammograms of K3Fe(CN)6 at various concentrations were studied in electrolyte at pH 7.0 by the modified electrode. It was found that the anodic and cathodic peak currents increase with concentration of the K3Fe(CN)6.
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