Multi-base color-changing luminescent fiber with antibacterial property and preparation method thereof

Abstract

The invention relates to a multi-base color-changing luminescent fiber with an antibacterial property and a preparation method thereof. The preparation method comprises the following steps of introducing an AIE chromophore into a polystyrene chain end by using an atom transfer radical polymerization method to prepare PS / AIE-(1, 2), then preparing a spinning solution from the PS / AIE-(1, 2), and carrying out electrostatic spinning to obtain the multi-base color-changing luminescent fiber with the antibacterial property; in the prepared fiber, covalent bonds of compound A and compound B are connected to the fiber, the aggregation state of the compound A and the compound B is J aggregation, and the compound A and the compound B respectively provide an AIE chromophoric group. According to the preparation method, AIE monomer molecules are covalently bound into a nanofiber material, the preparation method is simple, efficient and suitable for industrial application, and an AIE component in the multi-base color-changing luminescent fiber material with the antibacterial property is high in stability and excellent in uniformity, and the fiber material is good in color-changing and color-fading durability.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a multi-base color-changing light-emitting fiber with antibacterial properties and a preparation method thereof. Background technique [0002] The production of luminescent fibers can be classified into two categories: composite luminescent fibers and structural luminescent fibers. Composite luminescent fiber refers to the more traditional synthetic fiber production process, which refers to the fiber-forming polymer as the matrix, adding luminescent substances (such as light-storing pigments, phosphor powder or photoluminescent compounds), and then spinning or spraying. . The luminescent fiber produced by this kind of production route has the following characteristics: the wavelength range of the emitted light is wide, and the color of the light can be changed by the type of phosphor powder added; the operation is simple, the process can be well documented; the mechani...

AI Technical Summary

Problems solved by technology

[0007] At present, the application of photochromic luminescent materials on fabrics is mainly achieved by adding adhesives to paints for high-temperature baking, or using paint printing and coatings, which generally have defects such as poor color fastness, poor weather resistance, and poor durability.

There are also a small number of photochromic fibers produced by liquid crystal spinning, electrospinning, grafting spirooxazine groups or spiropyran groups, adding fluorescent agents or surface-adhering special microcapsules, but the preparation process is relatively complicated, It is harmful to the environment and has the potential to damage human health. In addition, it has defects such as easy damage to the surface structure, poor fatigue resistance and short service life.

For example, Chinese patent ZL200580011656 uses electrospinning to prepare photochromic fibers. This method can only prepare ultrafine short fibers, and the output is very low and the production process is complicated.

In the Chinese patent CN101701052A, the chemical grafting method is adopted, and the acrylate dye monomer containing spirooxazine group is polymerized by benzoyl peroxide, and then grafted on the main chain of nitrocellulose macromolecules for the preparation of photochromic film and coating, the modification process is complicated, a large amount of organic solvents are used, and the grafting rate cannot be guaranteed

In the Chinese patent CN104357936A, photochromic viscose fibers are obtained by acid spinning after mixing the photochromic microreducer emulsion and viscose solution evenly. This method belongs to solution spinning, and the process is complicated and pollutes the environment. In addition, the preparation The fiber strength is low, which greatly limits its application

In Chinese patent CN104047069A, photochromic dyes and low-melting-point nylon slices are melt-blended and granulated to prepare masterbatches, and then melt-spun with low-melting-point pellets to obtain photochromic POY filaments after drawing. Spinning efficiency, melt spinning will not pollute the environment, but the photochromic dyes distributed on the surface of the fiber not only reduce the weather resistance of the photochromic function, but also have low color fastness and easy decolorization, which will cause harm to the human body or the environment. influences

Patent CN103556300A selects fiber-grade polyethylene terephthalate as the core layer, adds polyethylene terephthalate of phenoxynaphthoquinone photochromic material as the skin layer, and prepares photochromic Fiber, prepared by this method is heat-bonded fiber, which mainly plays the role of bonding other materials and supports, and cannot be applied to product surface and pattern texture design. Excellent weather resistance, low color fastness, easy to decolorize, and also cause harm to human health, wearing comfort and the environment

In the Chinese patent CN109402780A, the fiber-forming polymer is selected as the skin layer, and the thermoplastic fiber-forming polymer is used as the core layer, but it is necessary to add photochromic dyes, antioxidants, spinning aids, thermal stabilizers, sensitizers, etc., and the process is complicated and The microcapsule technology solution has the problem of uneven dye distribution

The structured light-emitting fibers prepared by these methods need to be doped with rare earth metal complexes, and the degree of dispersion and stability of the doped rare earths have a huge impact on the light-emitting properties of the fibers; and the preparation methods and process are complicated

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