Nanofiber and preparation method thereof

Abstract

The invention relates to nanofiber and a preparation method thereof. An electrospinning technology is adopted, the electrospinning technology is simple, a used power supply uses alternating current, and the diameter of the nanofiber is much smaller than that of fiber obtained through a technology adopting direct-current voltage and can be up to 130 to 320 nm; since a coupling agent is adopted forpretreating nano titania, aggregation between inorganic particles is avoided, and the dispersity of the nanofiber is favorably improved; in addition, a polymer used for spinning contains chitosan, fibroin, soybean protein, on one hand, the coupling agent can be combined with the nano titania, on the other hand, groups on the coupling agent can be combined with functional groups in the chitosan, the fibroin and the soybean protein, so that the antibacterial durability of the nanofiber can be improved. According to the antibacterial nanofiber prepared by the invention, the mechanical performanceis good, and the antibacterial performance is better and can be up to 97 percent or above; after 30 times of washing, better antibacterial performance still can be obtained, and the antibacterial rate can be up to 90 percent or above.

Description

technical field [0001] The invention belongs to the field of nanofiber materials, in particular to an antibacterial nanofiber and a preparation method thereof. Background technique [0002] In the prior art, the preparation of antibacterial nanofibers requires not only good antibacterial properties, but also good antibacterial persistence. The commonly used method is to spin antibacterial agents and polymers together. However, the commonly used antibacterial The agent is an inorganic material, which is prone to agglomeration and poor dispersion, which affects the mechanical properties of the fiber, and the fiber diameter is large; in addition, the inorganic particles and the polymer are mixed together, which affects the antibacterial durability of the fiber to a certain extent; the above two Points will limit the application of fiber materials in extremely fine materials containing germs, and also limit the application of this material in medicine. The electrospinning proce...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the preparation of antibacterial nanofibers requires not only good antibacterial properties, but also good antibacterial persistence. The commonly used method is to spin antibacterial agents and polymers together. However, the commonly used antibacterial The agent is an inorganic material, which is prone to agglomeration and poor dispersion, which affects the mechanical properties of the fiber, and the fiber diameter is large; in addition, the inorganic particles and the polymer are mixed together, which affects the antibacterial durability of the fiber to a certain extent; the above two Points will limit the application of fiber materials in very fine materials containing germs, and also limit the application of this material in medicine

The electrospinning process has received extensive attention due to its advantages of simple equipment, controllable process, and finer diameter of spinning fibers. However, the power supply used in the existing electrospinning process is DC.

Images