Nitrogen-rich supercrosslinked porous polymer material, and preparation method and application thereof
A porous polymer, hypercrosslinking technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve problems such as illegal use, and achieve the effects of short adsorption time, fast adsorption rate, and easy operation.
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Embodiment 1
[0039] Embodiment 1: A kind of preparation method of nitrogen-rich hypercrosslinked porous polymer material
[0040] Experimental selection of triptycene (A 1 ) and 2,4-diamino-6-phenyl-1,3,5-triazine (A 2 ) as a prefunctionalized monomer. In short, the solid reactant A 1 (0.03mol, 7.63g) and A 2 (0.01 mol, 1.87 g) was dissolved in 15 mL of anhydrous 1,2-dichloroethane. Under nitrogen atmosphere, dimethoxymethane (0.08 mol, 7.06 mL) and anhydrous ferric chloride (0.06 mol, 9.75 g) were added to the above solution using a syringe. The resulting mixture was then heated to 45° C., refluxed at a constant temperature for 5 h, then slowly heated to 80° C., and refluxed at a constant temperature for 19 h. After cooling to room temperature, the crude product was collected by filtration, and the product was washed repeatedly with methanol solution until the filtrate was almost colorless. Finally, the product was dried in a vacuum oven at 60° C. to obtain brown solid triazine hype...
Embodiment 2
[0052] The hypercross-linked porous polymer material N-HCPP (2.5±0.2mg) was added to different concentrations of MG aqueous solution (5mL) and kept shaking at 25°C for 24h. The adsorbed N-HCPP was separated from the solution using a disposable filter device, and the concentration of the filtrate was tested by ultraviolet-visible spectroscopy at a wavelength of 618nm. With the increase of the concentration of MG before adsorption, the adsorption amount of MG by N-HCPP gradually increased until it stabilized at a certain value. At lower concentrations, more adsorption sites are available. As the concentration increased, the MG dye molecules occupied the available sites on the N-HCPP surface after reaching the maximum adsorption capacity. Therefore, after the concentration continued to increase, the adsorption amount tended to balance. Using the Freundlich isotherm model to fit the isotherm experimental data, it can be seen that the linear correlation coefficient R of N-HCPP to...
Embodiment 3
[0054] The hypercrosslinked porous polymer material N-HCPP (2.5 ± 0.2 mg) was added to the MG aqueous solution with an initial concentration of 10 ppm and shaken at regular intervals at 25 °C for different times. The adsorbed N-HCPP was separated from the solution using a disposable filter device, and the concentration of the filtrate was tested by ultraviolet-visible spectroscopy at a wavelength of 618nm. The results showed that the removal rate of MG by N-HCPP was above 60% within 5 minutes. Further, after fitting the experimental data with a pseudo-second-order kinetic model, the linear correlation coefficient R 2 Up to 0.9997, the calculated adsorption rate constant k 2 The value is 0.00497g·mg·min -1 . The results show that the adsorption of N-HCPP to MG conforms to the pseudo-second order kinetics, with Image 6 .
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