Chitosan-polyacrylamide magnetic composite microsphere material, preparation method and application thereof

[0037] Chitosan and PAM (weight ratio: 2:1) were mixed and dissolved in 1% acetic acid aqueous solution to prepare a 3% solution. After the solution was uniform, the magnetic particles Fe 3 o 4 (particle size 0.5±0.2 μm) is dispersed in the above polymer solution by ultrasound (magnetic particles account for 10% of the weight of the polymer material), and liquid paraffin is added (the volume ratio of liquid paraffin to the above mixed solution is 1.5:1) to adjust the pH After the value is 10, add glutaraldehyde aqueous solution (glutaraldehyde accounts for 1% of the weight of the polymer material), and cross-link for 2 hours at 35° C. to obtain the chitosan-PAM magnetic composite microsphere sample.

[0038] The microsphere is used as a water treatment agent, methyl orange is used as a simulated dye sewage, and the situation of removing methyl orange impurities in the above-mentioned water body is measured by a spectrophotometer (wavelength: 464nm). Such as figure 1 , figur...

[0040] Chitosan-PAM graft copolymer (grafting rate: 1.2) was dissolved in 1% acetic acid aqueous solution, was formulated into a 3% solution, and after the solution was uniform, the magnetic particle Fe 3 o 4(particle size 0.05±0.02μm) is dispersed in the above polymer solution by ultrasonic (magnetic particles account for 10% of the weight of the polymer material), add liquid paraffin (the volume ratio of liquid paraffin to the above mixed solution is 1.5:1), adjust the pH After the value is 9, add glutaraldehyde aqueous solution (glutaraldehyde accounts for 3% by weight of the polymer material), and cross-link at 45° C. for 2 hours to obtain the chitosan-PAM magnetic composite microsphere sample.

[0041] The microsphere is used as a water treatment agent, methyl orange is used as a simulated dye sewage, and the situation of removing the methyl orange impurity in the above-mentioned water body is measured by a spectrophotometer (wavelength: 464nm), and the removal rate reach...

[0043] Dissolve chitosan and PAM in 1% acetic acid aqueous solution with a mass mixing ratio of 1:4 to prepare a solution with a total concentration of 3%. After the solution is uniform, the magnetic particles Fe 3 o 4 (particle size 5 ± 2 μm) is dispersed in the above polymer solution by ultrasonic (magnetic particles account for 20% of the weight of the polymer material), add liquid paraffin (the volume ratio of liquid paraffin to the above mixed solution is 1.5: 1), adjust the pH value After 10 hours, add glutaraldehyde aqueous solution (glutaraldehyde accounts for 0.1% of macromolecular material weight), cross-linked at 35 ℃ for 2 hours, namely obtains chitosan-PAM magnetic composite microsphere sample (PAM accounts for the total weight of macromolecular material). 80% of the weight).

[0044] The microspheres are used as a water treatment agent to contain Cu 2+ In order to simulate sewage, by atomic absorption spectrometry, it is determined that it removes Cu in the abo...