Method for producing fluorescent polypropylene fibers by utilizing organic fluorescent compound

Abstract

The invention relates to a method for preparing fluorescent polypropylene fiber by adopting organic fluorescent compound. The method comprises the following steps: (1) salicylic aldehyde and derivatives of salicylic aldehyde are dissolved in absolute ethyl alcohol and heated to 70 to 100 DEG C in water bath, ethanol solution of diamine compound is added in drips, after condensing reflux and standing, brilliant yellow, orange or red precipitate can be obtained, and the precipitate is filtered, re-crystallized by ethanol, pump filtered and dried, thus obtaining the organic fluorescent compound; (2) polypropylene, the fluorescent compound and fluorescent additive are mixed uniformly, and melt blending, extruding and spinning are carried out by a multifilament 400 melting and spinning machine, the spinning speed is 400m / min, the spinning temperature is 270 DEG C, the after-drawing ratio is 2.8 times, and the fluorescent polypropylene fiber can be obtained. The preparing method is simple, and the yield is high; the obtained fluorescent compound has good solid luminescent property, non-toxicity, non-radioactivity, uniform dispersion in high polymer of polypropylene and good spinnability, and good luminescent effect can be obtained by only adding less than 1 percent of the fluorescent polypropylene fiber.

Description

technical field [0001] The invention belongs to the field of preparation of fluorescent materials, in particular to a method for preparing fluorescent polypropylene fibers by using organic fluorescent compounds. Background technique [0002] Fluorescent materials, commonly known as phosphors, are widely used in industry, agriculture, medicine, national defense and other fields. Can be used as fluorescent whitening agent, fluorescent dye, fluorescent pigment, fluorescent reagent, laser dye for anti-counterfeiting technology, fluorescence analysis, tracking detection, traffic sign, scintillator in nuclear technology, fluorescent concentrator in solar energy conversion technology Wait. At present, high-performance phosphors are usually some inorganic salt compounds or metal ion complexes, while few organic compounds are reported as high-performance phosphor compounds. This is because most organic fluorescent materials only have good fluorescence properties in solution but sho...

AI Technical Summary

Problems solved by technology

Coating or printing method is relatively simple, suitable for a variety of fibers and fabrics, the disadvantages are large amount of phosphor added, high cost, easy to peel off, and short service life

[0006] At present, there is still a lack of simple and easy-to-obtain organic solid-state fluorescent materials, and there are few literature and patent reports on charge-transfer fluorescent dyes in the D-π-A configuration and their applications in light-emitting fibers.

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