Carbon nanotube/chitosan/magnetic ferrite nanoparticle composite material, and preparation method and application thereof
A carbon nanotube and nanoparticle technology, which is applied in the field of nanocomposite materials to achieve the effects of good biocompatibility, integrity protection, and easy availability of raw materials
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Examples
Embodiment 1
[0034] (1) 30mg chitosan is dissolved in the dilute acetic acid (2wt%) solution of 30mL;
[0035] (2) Add 30 mg of multi-walled carbon nanotubes (with a diameter of 10-100 nm and a length of 0.-15 μm) into the above solution, and ultrasonically disperse for 1 h;
[0036] (3) Slowly add 12 wt% dilute ammonia water to the solution obtained in (2) to pH=7 of the solution; then add 20 mL of a solution of 0.15 g / ml glutaraldehyde dropwise, and magnetically stir for 24 hours at room temperature, then centrifuge, Wash 5 times with distilled water, centrifuge at 12000rpm for 10min to get the precipitate, and obtain the treated carbon nanotubes;
[0037] (4) Disperse the above-mentioned treated carbon nanotubes in 50mL distilled water, super-disperse 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 and modify the carbon nanotubes;
[0038](5) Add 1mol / L NaOH solution ...
Embodiment 2
[0043] (1) 30mg chitosan is dissolved in the dilute acetic acid (2wt%) solution of 30mL;
[0044] (2) Add 30 mg of multi-walled carbon nanotubes (with a diameter of 10-100 nm and a length of 0.-15 μm) into the above solution, and ultrasonically disperse for 1 h;
[0045] (3) Slowly add dilute ammonia water to the solution obtained in (2) until the pH of the solution is about 7, then add 20 mL of 15% glutaraldehyde solution dropwise, and after magnetic stirring at room temperature for 24 hours, centrifuge and wash with distilled water Wash 5 times, centrifuge at 12000rpm for 10min to get the precipitate, and obtain the treated carbon nanotubes;
[0046] (4) Disperse the carbon nanotubes obtained above in 50mL distilled water, ultrasonically disperse 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 Co 2+ Fully coordinate with the O atoms in chitosan and modify the carbon nanotubes;
[0047] (5) Add 1mol / L Na...
Embodiment 3
[0052] Dilute acetic acid concentration is 5wt% in the step (1), and volume is 20ml, and the consumption of chitosan is 40mg;
[0053] The consumption of multi-walled carbon nanotubes in step (2) is 25mg;
[0054] Add 0.25g / ml glutaraldehyde solution 24ml in the step (3);
[0055] Add 0.3mmol FeCl in step (4) 3 ·6H 2 O and 0.15 mmol of CoCl 2 ·6H 2 O;
[0056] In step (5), at 95 ℃ of reaction 5h, all the other are with embodiment 1, obtain carbon nanotube / chitosan / magnetic ferrite nano particle composite material (with MWCNTs / CS / Fe 3 o 4 nanoparticle composites). The detection effect is the same as in Example 1.
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Abstract
Description
Claims
Application Information
- IPC
- A61K49/12; A61K49/08; A61K49/18
- Inventors
- 吴惠霞; 刘刚