Graphene oxide-sodium alga acid magnetic composite material and preparation method thereof

A magnetic composite material, sodium alginate technology, applied in the direction of the magnetism of organic materials/organic magnetic materials, can solve the problems of dispersion, easy aggregation, and affecting the performance of composite materials, so as to achieve effective recycling and ensure uniform dispersion sexual effect

Inactive Publication Date: 2017-12-15
钱景
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the π-π stacking effect of graphene itself is easy to aggregate, there are certain problems in its dispersion in solvents (Chemical Progress, 2016, 05:647-656), which will affect the subsequent preparation of composite materials and the final product. performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (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 1:1, After reacting for 24 hours, wash and dry repeatedly with distilled water and ethanol to obtain PAMAM-modified sodium alginate; (2) Dissolve silk protein in deionized water to prepare a 10g / L aqueous solution. The ferric chloride aqueous solution is slowly dropped into the silk protein aqueous solution, and stirred evenly, wherein the mass ratio of the silk protein and ferric chloride is 10:1, and after stirring at a constant speed at 60°C for 1 hour, slowly add the PAMAM modification in step 1 Sodium alginate, the mass ratio of modified sodium alginate and silk protein is 1:1, after ultrasonic mixing, pour it into the mold, put it in liquid nitrogen for 1min, take it out and put it in -20℃ refrigerator for 6h, Freeze in a Thermo ultra-...

Embodiment 2

[0020](1) Disperse sodium alginate in deionized water at room temperature, bath ratio 1:50, slowly add 40g / L polyamide-amine PAMAM aqueous solution, wherein the volume ratio of PAMAM aqueous solution to sodium alginate aqueous solution is 1:8, After reacting for 24 hours, wash and dry repeatedly with distilled water and ethanol to obtain PAMAM-modified sodium alginate; (2) Dissolve silk protein in deionized water to prepare a 50g / L aqueous solution. The ferric sulfate aqueous solution is slowly dropped into the silk protein aqueous solution, and stirred evenly, wherein the mass ratio of the silk protein and ferric sulfate is 1:1, and after stirring at a constant speed at 60°C for 1 hour, slowly add the PAMAM modified alginic acid in step 1 Sodium, the mass ratio of modified sodium alginate to silk protein is 1:4, after ultrasonic mixing, pour it into the mold, put it in liquid nitrogen for 1min, take it out and put it in -20℃ refrigerator for 6h, -80℃ ℃Thermo ultra-low tempera...

Embodiment 3

[0022] (1) Disperse sodium alginate in deionized water at room temperature, bath ratio 1:50, slowly add 100g / 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, wash and dry repeatedly with distilled water and ethanol to obtain PAMAM-modified sodium alginate; (2) Dissolve silk protein in deionized water to prepare a 50g / L aqueous solution. The ferric nitrate aqueous solution was slowly dropped into the silk protein aqueous solution, and stirred evenly, wherein the mass ratio of the silk protein and ferric nitrate was 2:1, and after stirring at a constant speed at 60°C for 1 hour, slowly added the PAMAM modified alginic acid in step 1 Sodium, the mass ratio of modified sodium alginate to silk protein is 1:9, after ultrasonic mixing, pour it into the mold, put it in liquid nitrogen for 1min, take it out and put it in -20℃ refrigerator for 6h, -80℃ ℃ in a Thermo ultr...

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Abstract

The invention discloses a graphene oxide-sodium alga acid magnetic composite material and a preparation method thereof. The preparation process comprises the following steps: modifying sodium alginate using polyamidoamine (PAMAM); performing freeze-drying treatment using liquid nitrogen so as to obtain a sodium alga acid / silk magnetic porous composite material; dipping the sodium alga acid / silk magnetic porous composite material in a graphene oxide solution, taking out the composite material, repeatedly cleaning the material with ethanol and deionized water, and drying in vacuum, thereby obtaining the graphene oxide-sodium alga acid magnetic composite material. According to the method disclosed by the invention, the sodium alga acid and silk are taken as base materials, graphene oxide is effectively self-assembled, and the prepared graphene oxide-sodium alga acid magnetic composite material has huge application value in the fields of adsorption materials, biological materials, medical materials and the like.

Description

technical field [0001] The invention relates to a graphene oxide-sodium alginate magnetic composite material, 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 weight of P25 is 30kDa, and the rat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08L5/04C08L89/00C08K3/04C08K3/22H01F1/42
CPCC08J9/40C08J2305/04C08J2389/00C08J2405/04C08J2489/00C08K3/04C08K3/22C08K2003/2272C08K2201/01C08K2201/011H01F1/42
Inventor 钱景赵兵
Owner 钱景
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