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Fibroin-silver-nanoparticle composite material and preparation method thereof

A technology of silver nanoparticles and composite materials, applied in the field of silk protein-silver nanoparticle composite materials and their preparation, can solve the problems of complicated molding process, affecting the application of polymer-silver nanoparticle composite materials, and high cost, so as to expand the application. range effect

Active Publication Date: 2012-08-01
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the reported methods for preparing polymer-silver nanoparticle composites often require the use of some toxic and harmful chemical reagents such as chemical reducing agents and stabilizers; in addition, the synthesis conditions of silver nanoparticles are relatively harsh, and the polymer -Silver nanoparticle composite materials have disadvantages such as complex molding process and high cost, which to a large extent affect the practical application of polymer-silver nanoparticle composite materials

Method used

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  • Fibroin-silver-nanoparticle composite material and preparation method thereof
  • Fibroin-silver-nanoparticle composite material and preparation method thereof
  • Fibroin-silver-nanoparticle composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] Example 1: 20 mg of degummed silk precursor was immersed in 5 mL of silver nitrate solution with a concentration of 80 mg / mL and allowed to stand for 30 min, and then the entire reaction system was exposed to a 60 W incandescent lamp for 24 h. The silk is taken out, washed three times with deionized water to remove unreacted silver nitrate, and then dried at room temperature to prepare the silk-silver nanoparticle composite fiber.

Embodiment 2

[0033] Example 2: Add 20 mg of silver nitrate to about 5 mL of silk protein aqueous solution with a mass concentration of 12% under stirring, so that the concentration of silver nitrate is 4 mg / mL. Stirring was continued for 10 min to fully dissolve the silver nitrate, and a clear silk protein-silver nitrate mixed solution was obtained. After exposing the mixed solution to sunlight for 3 hours, the mixed solution was cast into a film-forming container, and dried at room temperature to form a film. The prepared membrane was treated with 80% ethanol aqueous solution for 30min, and then the membrane was washed 5 times with deionized water to remove unreacted silver nitrate, and then dried at room temperature to obtain silk protein-silver nanoparticles. particle composite film.

Embodiment 3

[0034] Example 3: Prepare an aqueous silk protein solution with a mass concentration of 15%, cast the aqueous silk protein solution into a film-forming container, and dry it at room temperature to form a film. The prepared film was treated with 80% ethanol aqueous solution for 30 min, and then dried at room temperature. The silk protein membrane was soaked in a silver nitrate solution with a concentration of 20 mg / mL and allowed to stand for 1 h, and then the entire reaction system was exposed to a 100 W incandescent lamp for 36 h. The membrane was taken out, washed four times with deionized water to remove unreacted silver nitrate, and then dried at room temperature to prepare a silk protein-silver nanoparticle composite membrane.

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Abstract

The invention belongs to the technical field of composite materials and particularly provides a fibroin-silver-nanoparticle composite material and a preparation method thereof. The fibroin-silver-nanoparticle composite material comprises fiber (including electrospinning fiber), film, hydrogel and three dimensional porous materials. The preparation method comprises the following steps: after fibroin solution and silver nitrate solution are mixed, the precursor of silver is converted into silver-nanoparticles through in-situ reduction under the irradiation of sunlight or simulated sunlight, and then the material is formed and prepared; or fibroin is prepared into different forms of materials first, then the materials are soaked in silver nitrate water solution, and finally, the precursor of silver is converted into silver-nanoparticles through in-situ reduction under the irradiation of sunlight or simulated sunlight. According to the invention, fibroin is taken as material matrix and the reducing agents and stabilizing agents of silver-nanoparticles, and no other chemical agent is required to be added; and the preparation process is simple, energy-saving and environment-friendly, and the material has various forms.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a silk protein-silver nanoparticle composite material which uses silk protein to reduce silver nanoparticles in situ and a preparation method thereof. Background technique [0002] Silver nanoparticles are a new kind of functional material. As a kind of nanomaterials, silver nanoparticles have properties such as surface effect, volume effect, quantum size effect and macroscopic quantum tunneling effect that are unique to nanomaterials. A series of excellent physical and chemical properties such as light, electricity, magnetism, catalysis and environmental sensitivity. Therefore, it can be widely used as catalysts, battery electrodes, optical materials, coatings, low-temperature superconducting materials, and biosensor materials, etc. In addition, silver nanoparticles have low toxicity and have varying degrees of inhibitory effects on many types of bacteri...

Claims

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Application Information

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IPC IPC(8): C08L89/00C08K3/08D01F4/02D01F1/10D06M11/83C08J7/00C08J9/40B22F9/24D06M101/10
Inventor 陈新费翔张人邵正中杨宇红
Owner FUDAN UNIV
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