Natural efficient self-assembled photothermal antibacterial nanoparticle, preparation method therefor and use thereof
A preparation process of the natural efficient self-assembled photothermal antibacterial nanoparticle is provided that includes mixing a solution of berberine in methanol and a solution of rhein of methanol to obtain a mixed solution, and then mixing the mixed solution with water and performing self-assembly reaction to obtain a self-assembled nanoparticle solution; and mixing the self-assembled nanoparticle solution with a solution of chromium chloride in methanol, and performing coordination reaction to obtain the natural efficient self-assembled photothermal antibacterial nanoparticle. The natural efficient self-assembled photothermal antibacterial nanoparticle prepared by the present invention can quickly raise the temperature under irradiation of near-infrared long-wave light, thus playing a role in instantaneous broad-spectrum sterilization. Because the berberine and the rhein have antibacterial effects, the prepared nanoparticle has a double synergistic sterilization effect under the irradiation of near-infrared long-wave light.
1 . A preparation method for a natural efficient self-assembled photothermal antibacterial nanoparticle, comprising the following steps:
(1) mixing a solution of berberine in methanol and a solution of rhein of methanol to obtain a mixed solution, and then mixing the mixed solution with water and performing self-assembly reaction to obtain a self-assembled nanoparticle solution;
(2) mixing the self-assembled nanoparticle solution with a solution of chromium chloride in methanol, and performing coordination reaction to obtain the natural efficient self-assembled photothermal antibacterial nanoparticle;
wherein a volume ratio of the solution of berberine in methanol and the solution of rhein in methanol in the step (1) is 1-3:1-3, and a volume ratio of the mixed solution and water in the step (1) and the solution of chromium chloride in methanol in the step (2) is 8-10:80-100:10-12;
wherein the self-assembly reaction in the step (1) is performed for 5-6 h, the self-assembly reaction is performed at a temperature of 60-70° C., and stirring is performed at a rotation speed of 300-600 r/min; and
wherein a molar volume ratio of the chromium chloride in the solution of chromium chloride in methanol to the solution of chromium chloride in methanol in the step (2) is 0.5-1 mmol:5-15 mL.
2 . The preparation method for the natural efficient self-assembled photothermal antibacterial nanoparticle according to claim 1 , wherein the solution of berberine in methanol in the step (1) has a concentration of 3-5 wt %, and the solution of rhein in methanol in the step (1) has a concentration of 2-4 wt %.
3 . A natural efficient self-assembled photothermal antibacterial nanoparticle prepared by the preparation method for the natural efficient self-assembled photothermal antibacterial nanoparticle according to claim 2 .
4 . The preparation method for the natural efficient self-assembled photothermal antibacterial nanoparticle according to claim 1 , wherein the coordination reaction in the step (2) is performed in the dark, the coordination reaction is performed at a temperature of 20-25° C., and the coordination reaction is performed for 4-6 h.
5 . The preparation method for the natural efficient self-assembled photothermal antibacterial nanoparticle according to claim 1 , wherein the step (2) further comprises: after the coordination reaction is completed, dialyzing, wherein the dialysis is performed at a temperature of 2-10° C., and the dialysis is performed for 24-36 h.
6 . A natural efficient self-assembled photothermal antibacterial nanoparticle prepared by the preparation method for the natural efficient self-assembled photothermal antibacterial nanoparticle according to claim 1 .
7 . A method of using the natural efficient self-assembled photothermal antibacterial nanoparticle according to claim 6 in the preparation of an antibacterial agent, comprising a step of contacting a bacteria with the natural efficient self-assembled photothermal antibacterial nanoparticle.