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Polyacrylic acid rare earth fluorescent gel and preparation method thereof

A polyacrylic acid and rare earth fluorescence technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of limiting the types and applications of polyacrylic acid gels, inability to form instability, and excessively strong electrostatic interaction with mineral salts. To achieve the effect of easy operation, simple preparation and great application prospects

Active Publication Date: 2020-05-22
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only +2-valent metal ions can meet the conditions for gel formation, and common +3-valent metal ions cannot form the above-mentioned gels due to strong electrostatic interactions or instability of mineral salts.
Thus, the types and applications of polyacrylic acid gels are limited.

Method used

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  • Polyacrylic acid rare earth fluorescent gel and preparation method thereof
  • Polyacrylic acid rare earth fluorescent gel and preparation method thereof
  • Polyacrylic acid rare earth fluorescent gel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of polyacrylic rare earth fluorescent gel, its preparation method comprises the steps:

[0032] At room temperature, configure a total of 40 mL of a mixed aqueous solution containing 0.3 mol / L polyacrylic acid (molecular weight: 250 000) and 0.1 mol / L terbium chloride. Under vigorous stirring (stirring speed is 600 rpm), 10 mL of 0.1 mol / L sodium carbonate The aqueous solution was dripped into the mixed solution at a rate of 0.1 mL / min, and a milky white gel was gradually formed. The resulting gel was repeatedly washed with deionized water to obtain a pure polyacrylic acid rare earth composite gel.

[0033] figure 1 It is the optical picture of the gel prepared in this embodiment under visible light and the optical picture under the excitation of 365nm ultraviolet light; from figure 1 It can be seen that the gel produced bright and uniform green fluorescence under UV light excitation.

[0034] Figure 4 It is the emission spectrogram of the gel prepared by th...

Embodiment 2

[0036] A kind of polyacrylic rare earth fluorescent gel, its preparation method comprises the steps:

[0037] Under room temperature conditions, configure a total of 40 mL of a mixed aqueous solution containing 0.3 mol / L polyacrylic acid (molecular weight 250 000), 0.1 mol / L europium chloride, and 10 mL of 0.1 mol / L sodium carbonate aqueous solution under vigorous stirring (stirring speed is 600 rpm) Drop it into the mixed solution at a rate of 0.1mL / min, and gradually form a milky white gel. The resulting gel was repeatedly washed with deionized water to obtain a pure polyacrylic acid rare earth composite gel.

[0038] figure 2 It is the optical picture of the gel prepared in this embodiment under visible light and the optical picture under the excitation of 365nm ultraviolet light; from figure 2 It can be seen that the gel produced bright and uniform red fluorescence under UV light excitation.

[0039] image 3 It is the optical picture of the gel prepared in this exam...

Embodiment 3

[0042] A kind of polyacrylic rare earth fluorescent gel, its preparation method comprises the steps:

[0043] Under room temperature conditions, configure a total of 40 mL of a mixed aqueous solution containing 0.5 mol / L polyacrylic acid (molecular weight 250 000), 0.1 mol / L lanthanum chloride, and 20 mL of 0.1 mol / L sodium carbonate aqueous solution under vigorous stirring (stirring speed is 600 rpm) Drop it into the mixed solution at a rate of 0.1mL / min, and gradually form a milky white gel. The resulting gel was repeatedly washed with deionized water to obtain a pure polyacrylic acid rare earth composite gel.

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Abstract

The invention belongs to the technical field of polymer materials, and particularly relates to polyacrylic acid rare earth fluorescent gel and a preparation method thereof. The preparation method comprises the following steps: preparing a mixed solution of polyacrylic acid and a rare earth salt, dropwise adding a sodium carbonate solution into the mixed solution while stirring so that hydrogel isgradually formed along with the addition of the sodium carbonate solution, and washing to obtain a product, wherein the molecular weight of the polyacrylic acid is 100,000 to 250,000. The polyacrylicacid gel prepared by the method has unique optical properties of rare earth ions and plasticity of physical cross-linked gel, is simple and convenient to prepare and easy to operate, has universalityto the rare earth ions, and has a great application prospect in the aspects of biomedicine, optical devices, counterfeiting prevention and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polyacrylic rare earth fluorescent gel and a preparation method thereof. Background technique [0002] Polyacrylic acid gel is widely used, non-toxic, environmentally friendly, cheap and easy to obtain, and plays an important role in adhesives, coatings, dressings, etc. For example, the main component of a wide variety of commercial high molecular polymer carbomers is polyacrylic acid gel. Carbopol was developed by Novo Corporation of the United States, including Carbopol series of rheology modifiers and Pemulen series of polymer emulsifiers, which are widely used in emulsions, creams, and medical drug delivery. [0003] The research results show that in the presence of polyacrylic acid with a certain molecular weight, alkaline earth metals and some transition metals can form amorphous mineral salt precipitates, and initiate self-assembly between polyacry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L33/02C08K3/26C09K11/02C09K11/78
CPCC08J3/075C08J2333/02C08K3/26C08K2201/011C09K11/025C09K11/7701C09K11/7729C09K11/7744
Inventor 陈明清周家华
Owner JIANGNAN UNIV
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