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A porous structure hydrogel material and its preparation and application

A porous structure and hydrogel technology, applied in the direction of luminescent materials, analytical materials, material excitation analysis, etc., can solve the problems of poor biocompatibility, difficult biodegradation, multi-level porous structure and mechanical properties to be further improved, to achieve Easy to degrade, simple and easy post-processing, avoid the effect of fluorescence quenching phenomenon

Active Publication Date: 2022-07-15
YUNNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, silica and synthetic polymer materials have some inherent disadvantages, such as poor biocompatibility and difficult biodegradation
In addition, in the rare earth composite materials prepared by traditional methods, the hierarchical porous structure and mechanical properties of the materials need to be further improved.
There are few reports on luminescent hydrogel composites with both hierarchical porous structure and good mechanical properties.

Method used

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  • A porous structure hydrogel material and its preparation and application
  • A porous structure hydrogel material and its preparation and application
  • A porous structure hydrogel material and its preparation and application

Examples

Experimental program
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Effect test

preparation example Construction

[0043] The preparation method of the above-mentioned porous structure hydrogel material comprises the following steps:

[0044] S1. Add Alg with a mass percentage concentration of 0.2 to 2% in the CNF sol, and stir at room temperature until fully dissolved;

[0045] S2, adding a sodium periodate solution with a molar concentration of 0.5 to 3M to the sol obtained in step S1, and fully stirring it evenly;

[0046] S3. Pour the sol obtained in step S2 into a suitable mold, then put it in a refrigerator, and freeze it at -25°C for 12 to 48 hours; S4. Thaw the jelly obtained in step S3 in water, and wash with a large amount of deionized water , to obtain a hydrogel;

[0047] S5, soak the hydrogel obtained in step S4 into a hydrochloric acid solution with a concentration of 0.05-1.2M, and then wash with a large amount of deionized water;

[0048]S6, soak the hydrogel obtained in step S5 in TbCl with a molar concentration of rare earth terbium ions of 0.01-0.2M 3 solution, then w...

Embodiment 1

[0056] Add 10 mg of Alg to 5 mL of CNF sol, and stir magnetically at room temperature until the Alg is fully dissolved. Subsequently, 5 mL of 0.5M sodium periodate was added, and after stirring evenly, the above sol was placed in a -25°C refrigerator for 12 hours, and then the obtained jelly was thawed in deionized water, washed with a large amount of deionized water, and then Immerse the obtained hydrogel material in 20mL of 0.05M hydrochloric acid solution for 12h, then wash the hydrogel with a large amount of deionized water, and then soak the hydrogel material in 20mL of 0.01M TbCl 3 After 24 hours in the solution, the hydrogel was washed with a large amount of deionized water, and then the hydrogel was immersed in 20 mL of an aqueous solution of 0.02M mercaptobenzoic acid sodium salt for 12 hours, and then washed with a large amount of deionized water to obtain a porous structure hydrogel material. .

Embodiment 2

[0058] Add 15 mg of Alg to 5 mL of CNF sol, and stir magnetically at room temperature until the Alg is fully dissolved. Subsequently, 5 mL of 0.6M sodium periodate was added, and after stirring evenly, the above sol was placed in a -25°C refrigerator for 16 hours, then the obtained jelly was thawed in deionized water, washed with a large amount of deionized water, and then Immerse the obtained hydrogel material in 20mL of 0.07M hydrochloric acid solution for 12h, then wash the hydrogel with a large amount of deionized water, and then soak the hydrogel material in 20mL of 0.02M TbCl 3 After 24 hours in the solution, the hydrogel was washed with a large amount of deionized water, and then the hydrogel was soaked in 20 mL of an aqueous solution of 0.03M mercaptobenzoic acid sodium salt for 12 hours, and then washed with a large amount of deionized water to obtain a porous structure hydrogel material. .

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Abstract

The invention relates to the technical field of hydrogel materials, and discloses a porous structure hydrogel material and its preparation and application. The hydrogel material is CNF / Alg / Tb / Mab, CNF and Alg are connected by hydrogen bonds to form a stable three-dimensional network, Tb is covalently bonded to the carboxyl group of Alg, and Mab is covalently bonded to Tb through the carboxyl group; The CNF is cellulose nanofiber, Alg is sodium alginate, Tb is rare earth terbium ion, and Mab is sodium mercaptobenzoate. Cellulose nanofibers are bound to sodium alginate by hydrogen bonding. The rare earth terbium ion is coordinated with the carboxyl functional group in the sodium alginate, so as to be stably connected to the hydrogel network skeleton in a covalent bond manner, and the sodium mercaptobenzoate is further coordinated with the rare earth terbium ion to form a green fluorescent material with excellent luminescence. The decomposition temperature was 292°C. Prepared by a freezing-thawing method, the obtained hydrogel material exhibits excellent compression function and can be used as an environmentally friendly copper ion recognition material.

Description

technical field [0001] The present invention relates to the technical field of hydrogel materials, and more particularly, to a porous structure hydrogel material and its preparation and application. Background technique [0002] Rare earth complexes have been widely concerned by researchers due to their excellent luminescence properties. In order to make the luminescent rare earth complexes practical, it is usually necessary to introduce the rare earth complexes into some suitable matrix. The traditional method is to introduce rare earth complexes into some synthetic polymers or silica matrix. However, silica and synthetic polymer materials have some inherent shortcomings, such as poor biocompatibility and poor biodegradation. In addition, in the rare earth composite materials prepared by traditional methods, the hierarchical pore structure and mechanical properties of the materials need to be further improved. Reports on luminescent hydrogel composites with both hierarch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L1/04C08L5/04C08K3/16C08K5/37C08J9/28C08J9/40C09K11/06G01N21/64
CPCC08J3/075C08J9/28C08J9/40C08J9/0095C08J9/0066C08J9/0061C08J9/0033C09K11/06G01N21/643C08J2301/04C08J2305/04C08K3/16C08K5/375C08J2201/0484C09K2211/182
Inventor 刘丰祎代天卫杨德超张金蒙田乙然张旭锋
Owner YUNNAN NORMAL UNIV
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