A kind of multifunctional hydrogel triggered by lignin phenolic resin-loaded silver nanospheres, preparation method and application thereof

A technology of phenolic resin and lignin, which is applied in the field of preparation of multifunctional hydrogels, can solve the problems of harsh reaction conditions, single function, and long gelation time of hydrogels, and achieves simple preparation methods, wide sources, and improved The effect of self-healing properties

Active Publication Date: 2022-08-02
QILU UNIV OF TECH
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Problems solved by technology

[0007] Aiming at the deficiencies of the preparation methods in the prior art, especially the deficiencies of long hydrogel gelation time, harsh reaction conditions, and single function

Method used

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  • A kind of multifunctional hydrogel triggered by lignin phenolic resin-loaded silver nanospheres, preparation method and application thereof
  • A kind of multifunctional hydrogel triggered by lignin phenolic resin-loaded silver nanospheres, preparation method and application thereof
  • A kind of multifunctional hydrogel triggered by lignin phenolic resin-loaded silver nanospheres, preparation method and application thereof

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preparation example Construction

[0034] In one or some embodiments of the present invention, there is provided a preparation method of lignin composite hydrogel, comprising the following steps:

[0035] lignin, phenol, formaldehyde and sodium hydroxide are dissolved in water, and the obtained solution is centrifuged and dried after hydrothermal curing to obtain lignin phenolic resin nanospheres. The obtained lignin phenolic resin nanospheres were added to the silver ammonia solution, stirred at room temperature, and then centrifuged and dried to obtain LPRN@Ag.

[0036]The obtained LPRN@Ag and ferric trichloride hexahydrate were mixed in water and stirred evenly, then an initiator and a cross-linking agent were added, and the multifunctional hydrogel was obtained by standing at room temperature.

[0037] In one or some embodiments of the present invention, there is provided a method for preparing the above-mentioned multifunctional hydrogel containing lignin phenolic resin-loaded silver nanospheres.

[0038]...

Embodiment 1

[0063] Preparation of lignin phenolic resin-loaded silver nanospheres:

[0064] The lignin-based phenolic resin nanospheres were optimally prepared according to the ratio of lignin to phenol (2:3, w / w). In detail, 0.32g of lignin, 0.48g of phenol, 0.76g of 37% formaldehyde solution and 0.0728g of NaOH were weighed and thoroughly mixed in an aqueous ethanol solution (80 mL of deionized water and 32 mL of ethanol), and then the mixed solution was heated at 65°C Heated for 1 h and heated at 90°C for 30 minutes. After that, the mixed solution was transferred to a sealed stainless steel autoclave lined with Teflon and heated at 120 °C for 12 h, and then cooled to room temperature naturally. The solid product was collected by centrifugation (10000 rpm, 5 min) and washed three times with deionized water and ethanol, respectively. Finally, lignin phenolic resin nanospheres were obtained by vacuum drying at 80 °C for 12 h.

[0065] Add 2 wt% ammonia solution to 20 mL of 10 mg mL -1...

Embodiment 2

[0069] Preparation of lignin phenolic resin-loaded silver nanospheres:

[0070] The lignin-based phenolic resin nanospheres were optimally prepared according to the ratio of lignin to phenol (2:3, w / w). In detail, 0.32g of lignin, 0.48g of phenol, 0.76g of 37% formaldehyde solution and 0.0728g of NaOH were weighed and thoroughly mixed in an aqueous ethanol solution (80 mL of deionized water and 32 mL of ethanol), and then the mixed solution was heated at 65°C Heated for 1 h and heated at 90°C for 30 minutes. After that, the mixed solution was transferred to a sealed stainless steel autoclave lined with Teflon and heated at 120 °C for 12 h, and then cooled to room temperature naturally. The solid product was collected by centrifugation (10000 rpm, 5 min) and washed three times with deionized water and ethanol, respectively. Finally, lignin phenolic resin nanospheres were obtained by vacuum drying at 80 °C for 12 h.

[0071] Add 2 wt% ammonia solution to 20 mL of 10 mg mL -1...

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Abstract

The invention belongs to the technical field of functional materials, and relates to a multifunctional hydrogel triggered by lignin phenolic resin-loaded silver nanospheres, a preparation method and application thereof. The preparation method of the multifunctional hydrogel containing the lignin-phenolic resin-loaded silver nanospheres includes: (1) the preparation method of the lignin-phenolic resin-loaded silver nanospheres. Dissolving lignin, phenol, formaldehyde and sodium hydroxide in water, after hydrothermal curing, centrifuging and drying the obtained solution to obtain lignin phenolic resin nanospheres; adding the obtained lignin phenolic resin nanospheres to silver ammonia solution, stirring at room temperature Centrifugal drying to obtain lignin phenolic resin-loaded silver nanospheres. (2) The preparation method of the multifunctional hydrogel. The obtained lignin phenolic resin-loaded silver nanospheres and ferric trichloride hexahydrate are mixed and stirred uniformly in water, then an initiator and a crosslinking agent are added, and the multifunctional hydrogel can be obtained by standing at room temperature. The problem of complex transaction conditions and single function of hydrogel in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and specifically provides a preparation method of a multifunctional hydrogel triggered by lignin phenolic resin-loaded silver nanospheres. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] A hydrogel is a water-containing, multifunctional polymer with a three-dimensional network structure. Its unique properties such as flexibility and biocompatibility make it widely studied and applied in many fields such as electrical devices, sensors, and biomedicine. However, how to prepare a multifunctional hydrogel with high mechanical strength, self-healing properties, electrical conductivity, antibacterial, and UV resistance is still a huge challenge. [0004] Lignin is one of the three major components of wood fiber, second only to cellulose in content, and lignin i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08J3/12C08G8/34C08L61/14C08K3/08C08F283/00C08F220/06
Inventor 吕高金崔涵姜炜坤刘玉吉兴香杨桂花
Owner QILU UNIV OF TECH
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