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Waterproof luminous hydrogel and preparation method thereof

A technology of hydrogel and luminescent powder, which is applied in the field of functional polymer composite gel materials, can solve the problems of affecting the water absorption performance of materials, short luminescence time of materials, and relatively long luminescence time requirements, so as to increase the content and increase the package. The effect of covering

Inactive Publication Date: 2017-12-08
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the luminescent gel material obtained by the above method, the luminescence time of the material is relatively short due to the rare earth element contained in the luminescent material, which quickly loses its efficacy when it sees water, and it will also affect the water absorption performance of the material. The time requirement is relatively long, so it is of great practical significance to study gel materials with long luminescence time and high water absorption performance.

Method used

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  • Waterproof luminous hydrogel and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] (1) Preparation of sodium silicate-coated luminescent powder: Weigh 95 parts of long-lasting luminescent powder and disperse in 380 parts of ethylene glycol to obtain a luminescent powder suspension, weigh 36 parts of sodium silicate and add it to the above suspension, and use Ammonia water adjusts the pH value of the mixture to 9-10, heats the suspension to 70°C, stirs, puts it in a water bath for 3 hours, sets aside for precipitation, removes the supernatant, washes it with ethanol, fully dries it, and places it in a muffle furnace for 300 Sinter at ℃ for 3 hours, and after cooling, the coated long-lasting luminescent powder can be obtained.

[0035] (2) Preparation of luminous and water-resistant composite gel:

[0036] Weigh 76 parts of acrylamide monomer and dissolve it in 950 parts of distilled water, stir, and add 1.52 parts of cross-linking agent N,N`-methylenebisacrylamide, 1.52 parts of initiator Ammonium persulfate and 19 parts of coated long-lasting lumines...

Embodiment 2

[0038] (1) Preparation of sodium silicate-coated luminescent powder: Weigh 30 parts of long-lasting luminescent powder and disperse in 900 parts of ethylene glycol to obtain a luminescent powder suspension, weigh 9.46 parts of sodium silicate and add it to the above suspension, and use Ammonia water adjusts the pH value of the mixture to 9-10, heats the suspension to 70°C, stirs, puts it in a water bath for 3 hours, sets aside for precipitation, removes the supernatant, washes it with ethanol, fully dries it, and places it in a muffle furnace for 300 Sinter at ℃ for 3 hours, and after cooling, the coated long-lasting luminescent powder can be obtained.

[0039] (2) Preparation of luminous and water-resistant composite gel:

[0040] Weigh 80 parts of acrylamide monomer and dissolve it in 780 parts of distilled water, stir, and add 1.6 parts of cross-linking agent N,N`-methylenebisacrylamide, 1.6 parts of initiator Ammonium persulfate and 28 parts of coated long-lasting lumines...

Embodiment 3

[0042] (1) Preparation of alumina-coated luminescent powder: Weigh 55 parts of long-lasting luminescent powder and disperse in 220 parts of ethylene glycol to obtain a luminescent powder suspension, ultrasonically disperse for 0.5 h, and weigh 44 parts of octadecahydrate aluminum sulfate Add to the above suspension, stir, and adjust the pH value of the mixture to 4-6 with ammonia water, heat the suspension to 65°C, put it in a water bath for 3 hours, let it stand for precipitation, remove the supernatant, wash with ethanol, and fully dry. Put it in a muffle furnace for sintering at 200°C for 3 hours, and after cooling, the alumina-coated long-lasting luminescent powder can be obtained.

[0043] (2) Preparation of luminous and water-resistant composite gel:

[0044] Weigh 88 parts of acrylamide monomer and dissolve it in 880 parts of distilled water, stir, and add 1.76 parts of cross-linking agent N,N`-methylenebisacrylamide, 1.76 parts of initiator Ammonium persulfate and 10 pa...

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Abstract

The invention discloses a waterproof luminous composite hydrogel material and a preparation method thereof. The hydrogel material is mainly prepared from the following raw materials in parts by weight: 70-90 parts of macromolecular monomer, 10-30 parts of inorganic substance coated luminous powder, 0.1-3 parts of crosslinking agent and 0.1-3 parts of initiator. The preparation method comprises the following steps: coating the surface of a long-afterglow luminous material with inorganic substances such as silicon dioxide and aluminum oxide; adding the inorganic substance coated luminous powder into the hydrophilic macromolecular monomer; then, adding the crosslinking agent and the initiator and mixing sufficiently; reacting and polymerizing at 65-80 DEG C to obtain waterproof luminous composite hydrogel. The hydrogel has the advantages of long luminescence time and good water absorption property.

Description

technical field [0001] The invention relates to a water-resistant luminescent hydrogel and its application, and belongs to the technical field of functional polymer composite gel materials. Background technique [0002] Superabsorbent hydrogel is a polymer functional material with a three-dimensional network structure formed by chemical crosslinking or physical crosslinking. The polymer network contains a large number of hydrophilic groups that can fully absorb water and swell, and generally can absorb its own weight. Hundreds or even thousands of times of water, and at the same time can absorb tens or hundreds of times of its own weight of normal saline, it does not dissolve after absorbing water and can maintain a certain shape, it is a special semi-solid state. Polyacrylamide hydrogels, which are commonly used in daily life, are used in large amounts, and are typical representatives of polymer hydrogels. They are used as water-absorbing agents in industry, agriculture, pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F222/38C08F2/44C08K9/10C08J3/075C08L33/26
CPCC08F2/44C08F220/56C08J3/075C08K9/10C08J2333/26C08F222/385
Inventor 李利王静
Owner NANJING NORMAL UNIVERSITY
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