A kind of preparation method of polymer nanocomposite film containing rare earth

Abstract

The invention relates to a preparation method of a rare earth-containing high-molecular nanocomposite film. The preparation method comprises the following steps of mixing an anionic polyelectrolyte liquid and a rare earth ionic salt liquid with the same volume and stirring for 12-24 hours to obtain a negatively charged high-molecular rare earth composite nanoparticle liquid; at 10-50 DEG C, placing a pretreated substrate into a cationic polyelectrolyte liquid, standing, cleaning and then placing the substrate into the negatively charged high-molecular rare earth composite nanoparticle liquid, standing, cleaning, circulating in such a manner to obtain the rare earth-containing high-molecular nanocomposite film. The preparation method is simple and is easy to operate and the prepared film has excellent optical property and broad application prospects.

Description

technical field [0001] The invention belongs to the field of preparation of polymer nanocomposite materials, in particular to a preparation method of rare earth-containing polymer nanocomposite films. Background technique [0002] Rare Earth Elements (Rare Earth Elements) have optical, electrical, magnetic and other properties that other elements do not have due to their particular atomic structure. In recent years, polymer rare earth compounds composed of rare earth elements and polymer materials have both the unique properties of rare earth and the characteristics of light weight, impact resistance and easy processing of polymers. They have been used in fluorescent materials, optical devices, catalysis, etc. Show broad application prospects. The preparation methods of polymer rare earth compounds can generally be roughly divided into two types. One is that rare earth compounds are uniformly dispersed into monomers or polymers as dopants to make rare earth polymers that ex...

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Problems solved by technology

The preparation methods of polymer rare earth compounds can generally be roughly divided into two types. One is that rare earth compounds are uniformly dispersed into monomers or polymers as dopants to make rare earth polymers that exist in a doped manner, which is called It is a doped rare-earth polymer; the doping method is simple, widely adaptable and practical, but it is a physical mixing method with many limitations: most rare-earth compounds have low affinity with resins, and high-concentration doping It is difficult to uniformly disperse the rare earth compound in the polymer matrix, and phase separation is easy to occur, the transparency of the material is deteriorated, and the strength is damaged.

Moreover, due to poor dispersion, it will also lead to quenching between fluorescent molecules, thereby reducing the fluorescence intensity and shortening the fluorescence lifetime, which ultimately limits its application range.

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