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Schematic depicting interaction of hydrophilic and hydrophobic functional groups for the adsorption and desorption of aqueous PFOA onto PNIPAm, above and below its LCST. The compound labeled 1 refers to PNIPAm, while compounds 2 and 3 refer to PFOA and water respectively. The hydrogen bonding interaction parameters are labeled using 𝛿h, while the dispersion interaction parameters are labeled using 𝛿d.
