Method for preparing degradable biocompatibility macromolecule/carbon nano-tube composite material
A technology of biocompatibility and carbon nanotubes, applied in the field of biomedical materials, can solve problems such as difficulty in uniform dispersion, affecting the enhancement effect and function of carbon nanotubes, and achieve convenient operation, adsorption, cell affinity and biological Good degradability and the effect of solving the problem of agglomeration
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example 1
[0021] Add carbon nanotubes (multi-walled carbon nanotubes, inner diameter 80-100nm, length 1-2μm) into concentrated sulfuric acid at 3g / L, stir and reflux for 4 hours at 80°C, and continue to reflux for 1 hour at room temperature. Deionized water was added to the resulting solution and centrifuged to remove the acid remaining in the solution until the solution was substantially neutral. The solution was then dried for 12 hours to fully remove residual moisture. The obtained carbon nanotube powder was ground for 15 minutes to obtain acidified carbon nanotubes. Dissolve 1.5g of PHBV (containing 79% of PHV) in 60ml of chloroform, and reflux in a 50°C water bath until fully dissolved. Add 0.0045 g of carbon nanotubes treated with surfactant, and disperse by ultrasonic for 10 min. After the mold is preheated at a temperature of 40° C., the dispersed solution is poured into a petri dish and left to stand for 2 minutes. First evaporate a large amount of solvent under the conditio...
example 2
[0023] At room temperature, prepare an aqueous solution of polyvinylpyrrolidone with a concentration of 0.002g / mL, and dissolve in a water bath at 40°C. Add 0.7 g of carbon nanotubes (multi-walled carbon nanotubes, with an inner diameter of 40-60 nm and a length of 5-15 μm), and ultrasonically disperse for 15 min. The mixture was centrifuged, the water layer was removed, and placed in a vacuum oven. After fully drying to constant weight, grinding is carried out to obtain surface-activated carbon nanotubes. Dissolve 1.5g of polylactic acid in 60ml of acetone, and bathe in water at 40°C until fully dissolved. Add 0.0075 g of carbon nanotubes treated with surfactant, and disperse by ultrasonic for 10 min. After the mold is preheated at a temperature of 30°C, the dispersed solution is poured into a petri dish and left to stand for 3 minutes. A large amount of solvent is evaporated at 5°C, and then dried at room temperature for molding.
example 3
[0025]Add carbon nanotubes (single-wall carbon nanotubes, inner diameter ≤ 2nm, length 1-2μm) into concentrated nitric acid solution at 3.5g / L, stir and reflux for 3.5 hours at 90°C, and continue to reflux for 2 hours at room temperature. Deionized water was added to the resulting solution and centrifuged to remove the acid remaining in the solution until the solution was substantially neutral. The solution was then dried for 12 hours to fully remove residual moisture. The obtained carbon nanotube powder was ground for 15 minutes to obtain acidified carbon nanotubes. Dissolve 1.5g of polycaprolactate in 60ml of xylene, and reflux in a water bath at 60°C until fully dissolved. Add 0.0075 g of carbon nanotubes treated with surfactant, and disperse by ultrasonic for 10 min. After the mold is preheated at a temperature of 50° C., the dispersed solution is poured into a petri dish and left to stand for 2 minutes. Dry and shape at room temperature.
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