Size-controllable Schiff base-type polymer nano-particle and preparation method of same
A Schiff base and nanoparticle technology, which is applied in the field of size-controllable Schiff base polymer nanoparticles and their preparation, and achieves the effects of improving purity, mild and easily controllable reaction process, and convenient industrial production.
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Embodiment 1
[0037] A size-controllable Schiff base polymer nanoparticle is prepared by reacting 2,6-diaminopyridine and formalin through a Schiff base; wherein, the content of formaldehyde in 2,6-diaminopyridine and formalin The molar ratio is 1:2; the concentration of formaldehyde in formalin is 37wt%; the particle size of the size-controllable Schiff base polymer nanoparticles is 120nm;
[0038] The size-controllable Schiff base polymer nanoparticles are prepared by the following steps:
[0039] S1. Put 0.15g 2,6-diaminopyridine into the reactor, add 300ml deionized water, seal the reactor, stir and dissolve, add 0.225g formalin after the 2,6-diaminopyridine dissolves, Continue to seal the reactor, stir and react at 20°C for 18h to obtain the mixed material;
[0040] S2. After centrifuging the mixed material, pour off the supernatant, wash twice with water, wash once with methanol, purify with methanol for 60 hours using a Soxhlet extractor, and dry to obtain size-controllable Schiff b...
Embodiment 2
[0043] A size-controllable Schiff base polymer nanoparticle is prepared by reacting 2,6-diaminopyridine and formalin through a Schiff base; wherein, the content of formaldehyde in 2,6-diaminopyridine and formalin The molar ratio is 1:18; the concentration of formaldehyde in formalin is 37wt%; the particle size of the prepared size-controllable Schiff base polymer nanoparticles is 2000nm;
[0044] The size-controllable Schiff base polymer nanoparticles are prepared by the following steps:
[0045] S1. Put 0.15g 2,6-diaminopyridine into the reactor, add 300ml deionized water, seal the reactor, stir and dissolve, add 0.25g formalin after the 2,6-diaminopyridine dissolves, Continue to seal the reactor, stir at 25°C for 30min, put it into an autoclave and react at 120°C for 16h to obtain the mixed material;
[0046] S2. After centrifuging the mixed material, pour off the supernatant, wash twice with water, wash once with methanol, use a Soxhlet extractor to purify with methanol fo...
Embodiment 3
[0048] A size-controllable Schiff base polymer nanoparticle is prepared by reacting 2,6-diaminopyridine and formalin through a Schiff base; wherein, the content of formaldehyde in 2,6-diaminopyridine and formalin The molar ratio is 1:2; the particle size of the size-controllable Schiff base polymer nanoparticles is 150nm; the concentration of formaldehyde in formalin is 40wt%
[0049] The size-controllable Schiff base polymer nanoparticles are prepared by the following steps:
[0050] S1. Put 0.15g of 2,6-diaminopyridine into the reactor, add 300ml of deionized water, seal the reactor, stir and dissolve, add 0.206g of formalin after the 2,6-diaminopyridine is dissolved, and continue Seal the reactor, stir at 25°C for 1h, put it into an autoclave and react at 60°C for 18h to obtain the mixed material;
[0051] S2. Centrifuge the mixed material, discard the supernatant, wash twice with water, wash once with methanol, purify with methanol for 72 hours using a Soxhlet extractor, ...
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