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    Surface-Initiated, Catechol-Containing Polymer Films for Effective Chelation of Aluminum Ions

    Year: 2021

    Journal: Langmuir, Volume 37, NOV 23, page 13617–13626

    Authors: Prozorovska, Liudmyla; Baker, Bradley A.; Laibinis, Paul E.; Jennings, G. Kane

    Organizations: U.S. Department of Energy under the Nuclear Energy Enabling Technologies (NEET) Program [DE-NE0008712]

    We present a new route for obtaining surface tethered polymer films containing pendant catechol functional groups via surface-initiated activators regenerated by electron transfer atom-transfer radical polymerization (SI-ARGET ATRP) of glycidyl methacrylate (GMA) and post-polymerization modification of the resulting poly(glycidyl methacrylate) (pGMA) films with dopamine. This method enables a high degree of functionalization of pGMA films with catechol groups at a controlled level, depending on the duration of the post polymerization modification reaction. The dopamine-pGMA films readily absorbs Al3+ and Zn2+ ions, as verified by quartz crystal microbalance with dissipation (QCM-D) under continuous flow conditions, and demonstrates a four-fold molar selectivity to Al3+ over Zn2+. The ions desorb from the films upon rinsing with pure deionized (DI) water, which regenerates the catechol sites in the dopamine-pGMA film. Subsequent exposure to metal ions after rinsing steps yields reproducible levels of loading.
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