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Graphene oxide porous composite material and preparation method thereof

A porous composite material, graphene technology, applied in the field of graphene oxide porous composite material and its preparation, to achieve the effect of good biocompatibility, maintaining shape and stable structure

Inactive Publication Date: 2014-01-01
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the Chinese invention patent (CN100566817C) "a biosorbent for adsorbing heavy metals and its preparation method", a biosorbent for adsorbing heavy metals and its preparation method are disclosed, using sodium alginate and gelatin glue as carrier materials. Kelp powder is embedded, and then immersed in the calcium chloride solution of the embedding solution to form gel particles, which can be freeze-dried to prepare biosorbents with a particle size of 1.5-3 mm, but the granular biosorbents prepared by this method are only suitable for treatment. Heavy metal sewage with low concentration (≤100mg / L)

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  • Graphene oxide porous composite material and preparation method thereof
  • Graphene oxide porous composite material and preparation method thereof
  • Graphene oxide porous composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] First, mix the gelatin solution with a concentration of 0.5wt% into the sodium alginate solution with a concentration of 4wt%, and stir it with a magnetic force at 400r / min for 90min at 35°C, then mix the graphene oxide solution with a concentration of 2wt% at 1ml / min Add it into the above solution at a speed of 100°C, stir for 30 minutes, adjust the pH value of the mixed solution to 5.33 with a volume concentration of 1% acetic acid solution, and let it stand for defoaming to obtain a graphene oxide / sodium alginate / gelatin blend sol.

[0037] Then slowly add calcium chloride solution with a concentration of 4wt% to the blended sol, stir evenly, then transfer it to a mold and let it stand for crosslinking for 240 minutes, the blended sol turns into a gel, freeze-dry, and obtain a graphene oxide porous composite material.

Embodiment 2

[0039]First, the gelatin solution with a concentration of 7wt% was mixed into the sodium alginate solution with a concentration of 1wt%, and stirred at 50°C for 60min with a magnetic force of 600r / min. Subsequently, the graphene oxide solution with a concentration of 2wt% was added to the above solution at a speed of 4ml / min, stirred for 50min, and then the pH value was adjusted to 4.73 with a hydrochloric acid solution with a volume concentration of 0.5%, and after standing for defoaming, graphene oxide was obtained. / sodium alginate / gelatin blend sol.

[0040] Then slowly add a calcium chloride solution with a concentration of 5wt% to the blended sol, stir evenly, then transfer to a mold to stand for crosslinking for 60 minutes, the blended sol is transformed into a gel, and freeze-dried to obtain a graphene oxide porous composite material.

Embodiment 3

[0042] Firstly, the gelatin solution with a concentration of 2wt% was mixed into the sodium alginate solution with a concentration of 1.5wt%, and stirred at 800r / min for 40min at 55°C with a magnetic force. Subsequently, a graphene oxide solution with a concentration of 2wt% was added to the above solution at a rate of 6ml / min, stirred for 90min, adjusted to a pH value of 5.87 with a volume concentration of 1% acetic acid solution, and left to defoam to obtain graphene oxide / alginic acid Sodium / gelatin blend sol.

[0043] Then slowly add calcium chloride solution with a concentration of 8.5wt% to the blended sol, stir evenly and then transfer to the mold to stand for crosslinking for 320min, the blended sol turns into a gel, and after freeze-drying, the graphene oxide porous composite material is obtained .

[0044] The present invention enumerates but is not limited to the specific embodiment scheme listed above. The graphene oxide porous composite material obtained through...

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Abstract

The invention discloses a graphene oxide porous composite material. The graphene oxide porous composite material comprises the following components in parts by weight: 0.5-4 parts of graphene oxide, 2-8 parts of sodium alginate and 2-8 parts of gelatin. According to the graphene oxide porous composite material disclosed by the invention, a graphene oxide / sodium alginate / gelatin blended sol is prepared, and an irreversible gel formed by exchanging calcium ions with sodium alginate ions is taken as a three-dimensional framework structure of the composite material, so that the obtained porous composite material has the advantages of good mechanical properties, regular tissue structure, high porosity and good biocompatibility, and is expected to be used in a large number of fields, such as water absorption, oil removal, sewage treatment, bio-medicines, tissue engineering, medical dressings and the like.

Description

technical field [0001] The invention relates to a graphene oxide porous composite material and a preparation method thereof, belonging to the field of functional material science. Background technique [0002] Porous material is a network structure material composed of interpenetrating or closed pores, which has the advantages of orderly pore structure, high material transport, large specific surface area, and light weight. It is widely used in the fields of drug delivery, chemical petroleum catalysis, sewage treatment, noise reduction and sound absorption, and tissue engineering. However, the performance of single-component porous materials is relatively simple, and it has been proved by practice that it can no longer meet the market demand. Porous composite materials can combine the advantages of each component, and the performance of the material can be optimized and improved, and it is attracting widespread attention. [0003] Graphene is a new type of carbon-based mat...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30
Inventor 陈宇岳焦晨璐熊佳庆林红
Owner SUZHOU UNIV
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