Multi-responsive microgel of hyperbranched poly(ether amine) (hPEA-mGel) for the selective adsorption and separation of hydrophilic fluorescein dyes

作者：Li, Bao; Jiang, Xuesong^*; Yin, Jie

来源：Journal of Materials Chemistry, 2012, 22(34): 17976-17983.

DOI：10.1039/c2jm33188h

• MOLECULAR RECOGNITION
• GUEST MOLECULES
• DENDRIMERS
• RECEPTORS
• BINDING
• NANOCAPSULE
• COMPLEXES
• MICELLES
• DELIVERY
• BEHAVIOR

We here designed and prepared a multi-responsive microgel (hPEA-mGel) fabricated through the co-assembly of hyperbranched poly(ether amine) and pentaerythritol tetra(3-mercaptopropionate) (PTMP) in aqueous solution, followed by thiol-ene photo-click crosslinking. The obtained hPEA-mGel is uniform-sized particles with 250 nm diameter and low polydispersity index (PDI = 0.15), and exhibited sharp responses to temperature and pH. The interaction between the host hPEA-mGel and a series of fluorescein dyes was investigated. hPEA-mGel exhibited strong adsorption to ETB, RB, EB, DBF and TCF, but very low affinity to FR and Cal. The big difference in the interaction between hPEA-mGel and different fluorescein dyes is indicative of the selective adsorption of hPEA-mGel to fluorescein dyes, which resulted from hydrophobic not electrostatic interactions. Based on the selective adsorption of fluorescein dyes by hPEA-mGel, we demonstrated a simple approach to separate a mixture of fluorescein dyes in aqueous solution.

• 出版日期2012
• 单位上海交通大学