Preparing method of pathogenic bacterium trapping and filtering antibacterial film

Abstract

The invention relates to a preparing method of a pathogenic bacterium trapping and filtering antibacterial film. The method includes the following steps of preparing a polylactic acid solution, preparing Fe3O4 magnetic nanoparticles, preparing compound fluid, conducting electrostatic spinning and representing fiber film performance. Polylactic acid is used as a fiber forming matrix, according to the pathogenic bacterium magnetotactic characteristic, by means of a coprecipitation method, the Fe3O4 magnetic nanoparticles are prepared, and by means of the electrostatic spinning preparing technology, polylactic acid and the magnetic particles are combined to form a low-resistance and high-permeability porous carrier interface; meanwhile, macro particles are converted into ultramicro nanoparticles, the bidirectional enhancement advantages of the nanometer porous interface and the small-size filtering film are brought into full play, and most of microorganisms and part of viruses can be effectively intercepted. By combining high polymer material science with food science, the novel porous pathogenic bacterium trapping and filtering antibacterial film is developed for filling up the nanoscale filtering film preparing blank in China.

Description

technical field [0001] The invention belongs to the field of food processing, and in particular relates to a method for preparing an antibacterial film for trapping and filtering pathogenic bacteria. Background technique [0002] Juice contains a large amount of pectin, tannin, cellulose, protein, starch and other macromolecules. These substances undergo slow physical changes and chemical reactions in the juice, resulting in deterioration of the juice during processing, storage, and sales, directly affecting the quality of the juice. . At this stage, gelatin, enzymatic hydrolysis, sand filter rod filtration and other methods are often used to clarify fruit juice. In addition, additional sterilization processes are required in traditional fruit juice processing to achieve long-term freshness preservation. However, the equipment investment is large and the process is cumbersome. [0003] At present, using filter membrane to clarify fruit juice is a relatively advanced clarifi...

AI Technical Summary

Problems solved by technology

On the basis of inheriting the advantages of the fruit juice filtration membrane prepared by the predecessors, it overcomes the shortcomings of the ordinary clarified juice filtration membrane. It can not only filter various macromolecular impurities in the clarified juice efficiently, but also achieve the effect of filtering antibacterial. Simple, short filtration time, low cost and low energy consumption, and this kind of filtration membrane has not been reported yet

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