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Abstract: Using activated epoxy group-containing silica gel as the carrier, the modification of β-cyclodextrin as functional monomer, and the indole-3-acetic acid (IAA) as template molecule, by Diels-Alder (DA) reaction with diene, a grafted furan-type diene was polymerized and crosslinked to obtain a molecularly imprinted polymer (DA-MIP). The structure of raw material, intermediates and the molecularly imprinted polymer was characterized by Fourier transform infrared spectroscopy (FTIR), cross polarization magic angle spinning 13C nuclear magnetic resonance spectroscopy (CP/MAS 13C NMR) and scanning electron microscope (SEM). The thermo-sensitivities were tested by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TG), adsorption performance and adsorption properties of the products were detected by adsorption experiment. The results showed the DA-MIP shows a good heat-reactivity. DA-MIP does not show the role of identification of IAA at low temperature (60 °C), but display specific identification of IAA at high temperature (140 °C), and showed obvious temperature sensitivity. Its temperature control is affected by environmental stimuli. The repetitive adsorption experiment of MIP show that the recovery rate is 84%. The results show that the MIP have a good reuse performance.
Template and target information: indole-3-acetic acid, IAA
Author keywords: DA-molecularly imprinted polymer, Temperature sensitivity and specific recognition for indole-3-acetic, Thermal performance, adsorption property, Intelligence material