Hydrogel composite material with porous structure as well as preparation and application thereof

A composite material and porous structure technology, applied in the direction of luminescent materials, chemical instruments and methods, can solve the problems of poor biocompatibility, difficult biodegradation, rare rare earth complex hydrogel materials, etc. The effect of inexpensive, good compressive strain characteristics

Active Publication Date: 2021-02-02
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 ...

Method used

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  • Hydrogel composite material with porous structure as well as preparation and application thereof
  • Hydrogel composite material with porous structure as well as preparation and application thereof
  • Hydrogel composite material with porous structure as well as preparation and application thereof

Examples

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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 0.5-4% to the CNF sol, and stir at room temperature until fully dissolved;

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

[0042] S3. Pour the sol obtained in step S2 into a suitable mold, then put it into a refrigerator, and freeze it at -25°C for 24 to 72 hours;

[0043] S4, thawing the jelly obtained in step S3 in water, and washing 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 it with a large amount of deionized water;

[0045] S6. Soak the hydrogel obtained in step S5 into EuCl with a molar concentration of rare earth europi...

Embodiment 1

[0052] Add 25 mg of CC to 5 mL of CNF sol, and stir magnetically at room temperature until CC is fully dissolved. Then add 0.25mL epichlorohydrin, stir evenly, then add 2mL 0.4M sodium hydroxide solution, stir the above sol evenly, place it in a -25°C refrigerator for 24h, and then put the obtained jelly in deionized water Thaw, wash with plenty of deionized water, and soak the resulting hydrogel material in 20 mL of 0.01M EuCl 3 12h in aqueous solution, then wash the hydrogel with a large amount of deionized water, then soak the hydrogel material in 20mL 0.01M 2-thienoyltrifluoroacetone deprotonated sodium salt solution for 12h, and then wash with a large amount of deionized water Washed with water to obtain a hydrogel composite material.

Embodiment 2

[0054] Add 30 mg of CC to 5 mL of CNF sol, and stir magnetically at room temperature until CC is fully dissolved. Then add 0.3mL epichlorohydrin, stir evenly, then add 2mL 0.5M sodium hydroxide solution, stir the above sol evenly, place it in a -25°C refrigerator for 30h, and then put the obtained jelly in deionized water Thaw, wash with plenty of deionized water, and soak the resulting hydrogel material in 20 mL of 0.15M EuCl 3 12h in aqueous solution, then wash the hydrogel with a large amount of deionized water, then soak the hydrogel material in 20mL 0.1M 2-thiophenoyltrifluoroacetone deprotonated sodium salt solution for 12h, and then wash with a large amount of deionized water Washed with water to obtain a hydrogel composite material.

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Abstract

The invention relates to the technical field of hydrogel composite materials, and discloses a hydrogel composite material with a porous structure as well as preparation and application thereof. The hydrogel composite material is CNF/CC/Eu/TTA, and a rare earth complex formed by TTA and Eu is connected with a three-dimensional network structure formed by CNF and CC in a covalent bond mode. The CNFis cellulose nanofibers, the CC is carboxylated chitosan, the Eu is rare earth europium ions, and the TTA is sodium salt obtained after deprotonation of 2-thiophene formyl trifluoroacetone. The cellulose nanofibers are combined with the carboxylated chitosan through hydrogen bonds. The rare earth europium ions are coordinated with carboxyl functional groups of the carboxylated chitosan, so that the rare earth europium ions are stably connected with a hydrogel network skeleton in a covalent bond mode, and the TTA is further coordinated with the rare earth europium ions to form an excellent redfluorescent hydrogel material which shows excellent compressive strain performance and can be used as an environment-friendly recognition material.

Description

technical field [0001] The invention relates to the technical field of hydrogel composite materials, and more specifically, relates to a porous structure hydrogel composite material and its preparation and application. Background technique [0002] Rare earth complexes have excellent luminescent properties, but pure rare earth complexes are greatly limited in practical applications. 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 silicon dioxide. 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. There are few reports on the rare earth complex hydrogel materials with good mechanical pro...

Claims

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Application Information

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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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