Carbon nano tube/polymer/magnetic ferrate nano composite material and preparation method thereof
A technology of nanocomposite materials and carbon nanotubes, which is applied in the direction of nuclear magnetic resonance/magnetic resonance imaging contrast agents, etc., to achieve the effect of simple operation, low cost and integrity protection
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Embodiment 1
[0030] 1) 30 mg chitosan was dissolved in 30 mL of dilute acetic acid solution (the mass fraction of acetic acid was 2%) to obtain solution a;
[0031] 2) adding 30 mg of multi-walled carbon nanotubes to the above-mentioned solution a, and ultrasonicating for 1 hour to obtain solution b;
[0032] 3) Slowly add dilute ammonia water to the b solution obtained in step 2) until the pH of the solution is about 7, then add 20 mL of a 15% glutaraldehyde solution dropwise, stir magnetically at room temperature for 24 hours, centrifuge at 12,000 rpm, remove the upper Clear liquid, the obtained carbon nanotube / chitosan composite was washed 5 times with distilled water;
[0033] 4) Disperse the carbon nanotube / chitosan composite obtained above in 50mL distilled water, sonicate for 1h, and add 0.3mmol FeCl to it 3 ·6H 2 O and 0.15 mmol FeCl 2 4H 2 O, stirred for 30min to make Fe 3+ and Fe 2+ Fully coordinate with the O atoms in chitosan to modify the carbon nanotubes to obtain solut...
Embodiment 2
[0041] 1) 30 mg chitosan was dissolved in 30 mL of dilute acetic acid solution (the mass fraction of acetic acid was 2%) to obtain solution a;
[0042] 2) adding 30 mg of multi-walled carbon nanotubes to the above-mentioned solution a, and ultrasonicating for 1 hour to obtain solution b;
[0043] 3) Slowly add dilute ammonia water to the b solution obtained in step 2) until the pH of the solution is about 7, then add 20 mL of a 15% glutaraldehyde solution dropwise, and then magnetically stir for 24 hours at room temperature, then centrifuge at 12000 rpm, The supernatant was removed, and the carbon nanotube / chitosan composite obtained was washed 5 times with distilled water;
[0044] 4) Disperse the carbon nanotube / chitosan composite obtained above in 50mL distilled water, sonicate for 1h, and add 0.3mmol FeCl to it 3 ·6H 2 O and 0.15 mmol of CoCl 2 ·6H 2 O, stirred for 30min to make Fe 3+ and Fe 2+ Fully coordinate with the O atoms in chitosan to modify the carbon nanotu...
Embodiment 3
[0052] A) 30mg chitosan is dissolved in the dilute acetic acid solution of 30mL (the mass fraction of acetic acid is 2%);
[0053] b) adding 30 mg of multi-walled carbon nanotubes to the above solution, and ultrasonicating for 1 hour to obtain solution b;
[0054] c) Slowly add dilute ammonia water to the solution b until the pH of the solution is about 7, then add 20 mL of 15% glutaraldehyde solution dropwise, and then magnetically stir for 24 hours at room temperature, then centrifuge to obtain carbon nanotubes / Chitosan complex, this complex is washed 5 times with distilled water, 12000rpm centrifugal 10min;
[0055] d) Disperse the carbon nanotube / chitosan composite obtained above in 50mL distilled water, sonicate for 1h, and add 0.3mmol FeCl to it 3 ·6H 2 O and 0.15 mmol of CoCl 2 ·6H 2 O, stirred for 30min to make Fe 3+ and Fe 2+ Fully coordinate with the O atoms in chitosan to modify the carbon nanotubes to obtain solution d;
[0056] e) Add 1mol / L NaOH solution ...
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