Abstract
The construction of novel polyesteramide (PEA) derivative with diverse structure and multifunction characteristics would provide effective promotion for the further development of PEAs. In this study, a phenolic hydroxyl-modified polyamide (PA) derivative (P2), which was prepared from benzoxazine-isocyanide chemistry (BIC), was selected as the phenolic source to condense with trimesoyl chloride (TMC). A type of novel cross-linked PEA derivative (PEA-TMC), which with diverse N, O-containing functional segments (amide, ester, tertiary amine, hydroxyl and carboxyl groups) in its structure, was successfully constructed. Chemical structure and elementary properties of PEA-TMC were characterized here. As compared to that of bare glassy carbon electrode (GCE), PEA-TMC-modified GCE (GCE/PEA-TMC) illustrated significantly strengthened electrochemical response toward Pb2+. Further investigation revealed that GCE/PEA-TMC can be applied as “enrichment”-type electrochemical probe for Pb2+, with the corresponding detection limit of ∼2.3 × 10−8 mol/L (3σ/k). At the same time, the efficient and selective adsorption of methylene blue (MB) by PEA-TMC was also studied. Experimental results showed that the kinetic and isotherm of MB adsorption by PEA-TMC were in accordance with pseudo-second-order and Langmuir models, respectively, with the maximum adsorption value up to ∼560.80 mg g−1.
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