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Preparation method and applications of modified graphene oxide/chitosan composite material

A technology of composite materials and rock oxide, which is applied in the field of preparation of modified graphene oxide/chitosan composite materials, can solve the problems of unfavorable adsorption material recovery of heavy metal pollutants, graphene oxide materials without mature molding technology, etc., and achieve excellent The effects of adsorption selectivity, ease of recycling, and excellent adsorption performance

Inactive Publication Date: 2017-07-14
山东金利特新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the graphene oxide material itself is a powder, which is not conducive to the recovery of adsorption materials and heavy metal pollutants. To solve this problem, graphene oxide needs to be molded. However, graphene oxide materials are different from other carbon materials and there is no mature molding technology.

Method used

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  • Preparation method and applications of modified graphene oxide/chitosan composite material
  • Preparation method and applications of modified graphene oxide/chitosan composite material
  • Preparation method and applications of modified graphene oxide/chitosan composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A kind of preparation method of the modified graphene oxide / chitosan composite material that is used for heavy metal Hg adsorption provided by the invention, comprises the following steps: Step 1: the modification of EDTA

[0026] Weigh EDTA and KH-550 at a mass ratio of 5:1 and add them to ethanol; the concentration of EDTA is 20%; stir at 80°C for 12 hours until the two are evenly mixed to obtain a mixed system A.

[0027] Step 2: Modification of graphene oxide

[0028] Weigh a certain amount of graphene oxide in another ethanol, the concentration of graphene oxide is 10%, ultrasonic 10h until graphene oxide is uniformly dispersed to obtain graphene oxide ethanol dispersion B, by mass ratio EDTA:graphene oxide=1 : 10 Mix system A and system B, reflux in 80°C oil bath for 4 hours after mixing, suction filter after reflux, and wash the obtained product three times with deionized water and ethanol respectively for later use.

[0029] Step 3: Preparation of spinning solu...

Embodiment 2

[0034] A kind of preparation method of the modified graphene oxide / chitosan composite material that is used for heavy metal Hg adsorption provided by the invention, comprises the following steps: Step 1: the modification of EDTA

[0035] Weigh EDTA and KH-560 at a mass ratio of 1:5 and add them to ethanol; the concentration of EDTA is 10%; stir at 20°C for 24 hours until the two are evenly mixed to obtain a mixed system A.

[0036] Step 2: Modification of graphene oxide

[0037] Weigh a certain amount of graphene oxide in another ethanol, the concentration of graphene oxide is 1%, ultrasonic 2h until graphene oxide is uniformly dispersed to obtain graphene oxide ethanol dispersion B, by mass ratio EDTA:graphene oxide=10 : 1 Mix system A and system B, reflux in 40°C oil bath for 24 hours after mixing, suction filter after reflux, and wash the obtained product three times with deionized water and ethanol respectively for later use.

[0038] Step 3: Preparation of spinning solut...

Embodiment 3

[0043] A kind of preparation method of the modified graphene oxide / chitosan composite material that is used for heavy metal Hg adsorption provided by the invention, comprises the following steps: Step 1: the modification of EDTA

[0044] Weigh EDTA and A-150 at a mass ratio of 1:1 and add them to ethanol; the concentration of EDTA is 50%; stir at 70°C for 2 hours until the two are evenly mixed to obtain a mixed system A.

[0045] Step 2: Modification of graphene oxide

[0046] Weigh a certain amount of graphene oxide in another ethanol, the concentration of graphene oxide is 5%, ultrasonic 8h until graphene oxide is uniformly dispersed to obtain graphene oxide ethanol dispersion B, by mass ratio EDTA:graphene oxide=1 : 1 Mix system A and system B, reflux in 60°C oil bath for 14 hours after mixing, suction filter after reflux, and wash the obtained product three times with deionized water and ethanol respectively for later use.

[0047] Step 3: Preparation of spinning solution...

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Abstract

The invention discloses a preparation method and applications of a modified graphene oxide / chitosan composite material. The preparation method comprises the following steps: carrying out EDTA modification and graphene oxide modification, adding modified graphene oxide into glacial acetic acid, carrying out an ultrasonic treatment until modified graphene oxide and glacial acetic acid are evenly mixed, performing high speed dispersion by using a high speed dispersing machine, and finally moulding the modified graphene oxide / chitosan composite material. The modified graphene oxide / chitosan composite material is prepared by a wet spinning technology. After modification, the surface of graphene oxide comprises a large amount of functional groups, the functional groups can enhance the adsorption performance of the composite material under a low graphene oxide content, at the same time, the bonding strength between graphene oxide and chitosan is strengthened, and the mechanical strength of the composite material is greatly improved. The composite material has excellent adsorption selectivity on heavy metal Hg; at the same time, graphene oxide can be recovered and reutilized more conveniently, and the problem that after graphene oxide is subjected to a water treatment, graphene oxide is hard to recover and generates secondary pollution is solved.

Description

technical field [0001] The invention relates to a modified graphene oxide composite molding material, in particular to a preparation method and application of a modified graphene oxide / chitosan composite material. Background technique [0002] Heavy metal pollution is a worldwide economic and social problem. The current treatment methods have problems such as high residual amount, heavy metal pollutants cannot be completely recovered, and residual heavy metals cause secondary pollution to the environment. Graphene oxide has the characteristics of high specific surface area, large adsorption capacity and thorough removal of heavy metals such as lead, cadmium, arsenic, and mercury. Used in heavy metal treatment, it can solve key technical problems such as incomplete removal, achieve 99% recovery of heavy metal pollutants, and make historic breakthroughs in major technical indicators such as complete removal of heavy metals. However, the graphene oxide material itself is a pow...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/24B01J20/20C02F1/286C02F2101/20
Inventor 宋肖肖苏阳苏启顺
Owner 山东金利特新材料有限责任公司
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