A kind of preparation method of formaldehyde removal composite fiber membrane

Abstract

The invention discloses a preparation method of a formaldehyde-removing composite fiber film. The method comprises the following steps of 1, preparation of a polymer antimicrobial fiber layer, wherein 80-90 parts of micromolecule solvent is used for dissolving 10-20 parts of polymer A, antimicrobial compound dispersion liquid with the concentration of 0.01-0.1 mol / l is added dropwise under stirring at the speed of 100-300 rpm, the volume ratio of the antimicrobial compound dispersion liquid to the polymer A solution is (8-10):(1-2), stirring is continued for 30-40 min, and antimicrobial nanofibers are prepared; 2, preparation of a polymer formaldehyde-removing fiber film layer, wherein 3-8 parts of kieselguhr / porous carbon, 70-80 parts of polymer B, 0.5-2 parts of antioxidant and 10-15 parts of plasticizer are fully mixed, and formaldehyde-removing composite fibers are prepared; 3, the fiber layer prepared in the step 1 and the fiber layer prepared in the step 2 are composited into the film. According to the method, the antimicrobial fibers and the formaldehyde-removing fibers are prepared separately and then composited into the film, the composite fiber film has excellent antimicrobial and formaldehyde-removing properties under the synergistic effect of an antimicrobial compound and the kieselguhr / porous carbon, the demand for a multifunctional fiber film is met, and application of the film is further expanded.

Description

technical field [0001] The invention relates to the technical field of composite fiber membranes, in particular to a preparation method of a formaldehyde-removing composite fiber membrane. Background technique [0002] Nanofibrous membrane has the advantages of large surface area, high porosity, loose structure, pre-designed composition according to the required function, simulating extracellular matrix, and simple preparation method, and has great application potential in many fields. It has been used in food, medicine, Daily chemicals and other fields have been widely used. In particular, nanofibrous membranes prepared with natural polymers as spinning solutions not only have the above characteristics, but also have excellent biocompatibility, biodegradability and renewability. [0003] The silver-loaded nanoparticle / composite fiber membrane prepared by the prior art has poor biocompatibility, and by-products are produced during the preparation process, which causes the s...

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Problems solved by technology

[0003] The silver-loaded nanoparticle / composite fiber membrane prepared by the prior art has poor biocompatibility, and by-products are produced during the preparation process, causing the structure of the fiber membrane to be destroyed, which limits the application of the antibacterial fiber membrane

Moreover, because nano-silver is granular and the particle size is nano-level, it can only be gathered in specific parts of graphene and cannot be evenly distributed on the surface, thereby affecting the antibacterial effect; on the other hand, nano-silver and graphene cannot be tightly combined (especially When the content of nano-silver particles increases, it is easy to agglomerate), and it is easy to fall off during use, thus affecting the service life and antibacterial effect

At the same time, the existing fiber membranes have a single function, and one fiber membrane cannot meet various needs. Often, the fiber membrane materials with multiple functions are superimposed, but it is difficult to achieve the expected effect.

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