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Graphene and silver nanowire loaded silk/sodium alginate porous composite material

A technology of porous composite material and silver nanowire, which is applied in the field of nanocomposite materials and achieves the effect of huge application value

Inactive Publication Date: 2018-01-09
赵兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are only a few research reports on three-dimensional porous composites of metal nanowires

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Disperse sodium alginate in deionized water at room temperature, bath ratio 1:50, slowly add 1g / L polyamide-amine PAMAM aqueous solution, wherein the volume ratio of PAMAM aqueous solution to sodium alginate aqueous solution is 1:1, After reacting for 24 hours, it was repeatedly washed with distilled water and ethanol, and dried to obtain PAMAM-modified sodium alginate. (2) Dissolve silk protein in deionized water to prepare a 1g / L aqueous solution. Slowly drop 1g / L ferric chloride aqueous solution into the silk protein aqueous solution at 50°C and stir evenly. The mass ratio of protein to ferric chloride is 1:1, after stirring at a constant speed at 60°C for 1 hour, slowly add the PAMAM modified sodium alginate in step 1, the mass ratio of the modified sodium alginate to silk protein is 1:1 , after ultrasonically mixing evenly, pour it into the mold, put it in liquid nitrogen for 1min, take it out and put it in a -20°C refrigerator for 6h, freeze it in a Thermo ult...

Embodiment 2

[0022] (1) Disperse sodium alginate in deionized water at room temperature, bath ratio 1:50, slowly add 10g / L polyamide-amine PAMAM aqueous solution, wherein the volume ratio of PAMAM aqueous solution to sodium alginate aqueous solution is 1:5, After reacting for 24 hours, it was repeatedly washed with distilled water and ethanol, and dried to obtain PAMAM-modified sodium alginate. (2) Dissolve silk protein in deionized water to prepare a 10g / L aqueous solution, slowly drop 10g / L ferric sulfate aqueous solution into the silk protein aqueous solution at 70°C, and stir evenly, wherein the silk protein The mass ratio to ferric sulfate is 5:1, after stirring at a constant speed at 60°C for 1 hour, slowly add the PAMAM modified sodium alginate in step 1, the mass ratio of the modified sodium alginate to silk protein is 1:5, ultrasonic After mixing evenly, pour it into a mold, put it in liquid nitrogen for 1 minute, take it out and put it in a -20°C refrigerator for 6 hours, freeze ...

Embodiment 3

[0024] (1) Disperse sodium alginate in deionized water at room temperature, bath ratio 1:50, slowly add 50g / L polyamide-amine PAMAM aqueous solution, wherein the volume ratio of PAMAM aqueous solution to sodium alginate aqueous solution is 1:10, After reacting for 24 hours, it was repeatedly washed with distilled water and ethanol, and dried to obtain PAMAM-modified sodium alginate. (2) Dissolve silk protein in deionized water to prepare a 50g / L aqueous solution, slowly drop 50g / L ferric nitrate aqueous solution into the silk protein aqueous solution at 80°C, and stir evenly, wherein the silk protein The mass ratio to ferric nitrate is 10:1, after stirring at a constant speed at 60°C for 1 hour, slowly add the PAMAM modified sodium alginate in step 1, the mass ratio of the modified sodium alginate to silk protein is 1:10, ultrasonic After mixing evenly, pour it into a mold, put it in liquid nitrogen for 1 minute, take it out and put it in a -20°C refrigerator for 6 hours, free...

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Abstract

The invention discloses a graphene and silver nanowire loaded silk / sodium alginate porous composite material and a preparation method. The preparation process comprises the following steps: modifyingsodium alginate with PAMAM; preparing a silk / sodium alginate porous composite material through liquid nitrogen and freeze drying treatment; soaking the silk / sodium alginate porous composite material in a graphene oxide solution for sufficient adsorption; reducing with a reducing agent to obtain a graphene loaded silk / sodium alginate three-dimensional porous composite material; finally, performinglayer-by-layer self-assembly of a silver nanowire on the surface of the graphene loaded silk / sodium alginate three-dimensional porous composite material by use of electrostatic attraction, to finallyobtain the graphene and silver nanowire loaded silk / sodium alginate porous composite material. According to the invention, the sodium alginate and the silk are adopted as base materials, and the graphene and the silver nanowire are subjected to effective self-assembly to obtain the graphene and silver nanowire loaded silk / sodium alginate porous composite material which has huge application value in the fields such as photoelectric material, adsorption materials, biological materials and medical materials.

Description

technical field [0001] The invention relates to a silk / sodium alginate porous composite material loaded with graphene and silver nanowires, belonging to the field of nanocomposite materials. Background technique [0002] Silk is known as the queen of fibres. It feels soft, thick, smooth, plump, and has a soft luster like pearls. It is widely used in the textile and clothing industries. Silk is composed of sericin and silk fibroin, wherein sericin is located in the outer layer of silk with a content of 20%-30%, and silk fibroin is located in the inner layer of silk with a content of 70%-80%. Silk fibroin located in the inner layer of silk is a natural polymer material composed of 18 kinds of amino acids such as serine, glycine and alanine, with a molecular weight of about 2300kDa. It consists of heavy chain, light chain and P25, wherein the molecular weight of the heavy chain H chain is 350kDa, the molecular weight of the light chain L chain is 26kDa, and the molecular weigh...

Claims

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Application Information

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IPC IPC(8): C08J9/40C08J9/42C08J9/28C08L89/00C08L5/04C08L79/02C08K3/22C08K3/04
Inventor 赵兵
Owner 赵兵
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