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A kind of hydrogel composite material with porous structure and its preparation and application

A composite material and porous structure technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of rare earth complex hydrogel materials, difficult biodegradation, poor biocompatibility, etc., and achieve good compressive strain Features, easy degradation, and the effect of good mechanical properties

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

Inherent disadvantages of these matrices are poor biocompatibility and poor biodegradability
In addition, in the rare earth composite materials prepared by traditional methods, the mechanical properties of the materials also need to be further improved
Reports on rare earth complex hydrogel materials with both good mechanical properties and excellent luminescent properties are still rare.

Method used

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  • A kind of hydrogel composite material with porous structure and its preparation and application
  • A kind of hydrogel composite material with porous structure and its preparation and application
  • A kind of hydrogel composite material with porous structure and its preparation and application

Examples

Experimental program
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Effect test

preparation example Construction

[0039] The preparation method of the hydrogel composite material of the above-mentioned porous structure comprises the following steps:

[0040] S1. Add CC with a mass percentage concentration of 0.5 to 4% in the CNF sol, and stir at room temperature until fully dissolved;

[0041] S2, adding epichlorohydrin with a volume ratio of 5 to 20% and sodium hydroxide with a molar concentration of 0.4 to 1.5 M into the sol obtained in step S1, and fully stirring it evenly;

[0042] 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 24-72 hours;

[0043] S4, the jelly obtained in step S3 is thawed in water, and washed with a large amount of deionized water to obtain a hydrogel;

[0044] S5, soak the hydrogel obtained in step S4 in a hydrochloric acid solution, and then wash with a large amount of deionized water;

[0045] S6, soak the hydrogel obtained in step S5 in EuCl with a rare earth europium ion molar concentration...

Embodiment 1

[0052] Add 25 mg of CC to 5 mL of CNF sol and stir magnetically at room temperature until the CC is fully dissolved. Subsequently, 0.25 mL of epichlorohydrin was added, and after stirring evenly, 2 mL of 0.4M sodium hydroxide solution was added, and the above sol was stirred evenly and placed in a -25°C refrigerator for 24 hours, and then the obtained jelly was placed in deionized water. Thawed, washed with plenty of deionized water, and soaked the resulting hydrogel material in 20 mL of 0.01 M EuCl 3 In aqueous solution for 12h, then washed the hydrogel with a large amount of deionized water, then soaked the hydrogel material in 20mL of 0.01M 2-thiopheneformyl trifluoroacetone deprotonated sodium salt solution for 12h, and then used a large amount of deionized water. Washed with water to obtain a hydrogel composite.

Embodiment 2

[0054] 30 mg of CC was added to 5 mL of CNF sol, and magnetically stirred at room temperature until the CC was fully dissolved. Subsequently, 0.3 mL of epichlorohydrin was added, and after stirring evenly, 2 mL of 0.5M sodium hydroxide solution was added, and the above sol was stirred evenly and placed in a -25°C refrigerator for 30 hours, and then the obtained jelly was placed in deionized water. Thawed, washed with plenty of deionized water, and soaked the resulting hydrogel material in 20 mL of 0.15 M EuCl 3 In aqueous solution for 12h, the hydrogel was washed with a large amount of deionized water, and then the hydrogel material was soaked in 20mL of 0.1M 2-thiopheneformyl trifluoroacetone deprotonated sodium salt solution for 12h, and then a large amount of deionized water was used. Washed with water to obtain a hydrogel composite.

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Abstract

The invention relates to the technical field of hydrogel composite materials, and discloses a porous structure hydrogel composite material and its preparation and application. The hydrogel composite material is CNF / CC / Eu / TTA, and the rare earth complex formed by TTA and Eu is connected with the three-dimensional network structure formed by CNF and CC by covalent bond. Wherein, the CNF is a cellulose nanofiber, CC is a carboxylated chitosan, Eu is a rare earth europium ion, and TTA is a deprotonated sodium salt of 2-thiopheneformyl trifluoroacetone. Cellulose nanofibers bind to carboxylated chitosan through hydrogen bonding. The rare earth europium ion is coordinated with the carboxyl functional group of the carboxylated chitosan, so that it is stably connected to the hydrogel network skeleton in a covalent bond manner. TTA is then further coordinated with the rare earth europium ion to form an excellent red fluorescent hydrogel material. It exhibits excellent compressive strain properties and can be used as an environmentally friendly identification material.

Description

technical field [0001] The present invention relates to the technical field of hydrogel composite materials, and more particularly, to a porous structure hydrogel composite material and its preparation and application. Background technique [0002] Rare earth complexes have excellent luminescence properties, but the practical application of pure rare earth complexes is greatly limited. The introduction of rare earth complexes into some matrix materials can expand the application range of rare earth complexes. The traditional method is to dope rare earth complexes into some synthetic polymers or matrix materials such as silica. The inherent disadvantage of these matrices is poor biocompatibility and poor biodegradation. In addition, in the rare earth composite materials prepared by traditional methods, the mechanical properties of the materials also need to be further improved. There are few reports on rare earth complex hydrogel materials with good mechanical properties an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08J9/00C08L5/08C08L1/02C08K5/00C09K11/06
CPCC08J3/075C08J9/00C09K11/06C08J2305/08C08J2401/02C08J2301/02C08J2405/08C08K5/0091C09K2211/182
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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