Preparation method and application of graphene oxide-polyurethane foam material

A foaming material, graphene technology, applied in chemical instruments and methods, other chemical processes, textile industry wastewater treatment and other directions, can solve problems such as difficult separation, complex synthesis process, and not particularly ideal adsorption capacity.

Inactive Publication Date: 2013-11-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The results show that graphite oxide has a high adsorption capacity for the three dyes, but the substance is not easy to separate after adsorption
[0006] (2) Journal of Wuhan University, 2012, 45(6): 860-865, reported the adsorption of reactive brilliant red by graphite oxide / chitosan magnetic composite adsorbent Performance research, the results show that: the optimal pH value of the adsorbent for adsorbing reactive brilliant red is 2, the saturated adsorption capacity is 706 mg / g, the adsorption speed is fast, and the adsorption of reactive brilliant red reaches the adsorption equilibrium within 30 minutes, but its synthesis Complex process
This study uses a magnetic field to separate the adsorbent, which greatly reduces the difficulty of separation, but the adsorption capacity is not particularly ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] Preparation of Graphene Oxide

[0035] Its preparation steps include:

[0036] Add 23 mL of concentrated H to the beaker 2 SO 4 , placed in an ice-water bath until the temperature dropped to 0°C, 1g graphite powder, 0.5g NaNO 3 Concentrated H 2 SO 4 , then slowly add 3g KMnO 4 , keep stirring in ice bath for 1h;

[0037] The mixture was dark green, the temperature of the system was raised to 35°C, and the stirring was continued for 2h;

[0038] Add 46mL H dropwise 2O, the mixture gradually turns brown. After adding water, put it in an oil bath at 98°C and continue to stir for 30 minutes. The color of the mixture turns from brown to bright yellow. Take it out and add 140mL of H 2 O and 10 mL 30% H 2 o 2 , mixed and then centrifuged, and the product was centrifugally cleaned with 5% HCl by mass fraction, then fully washed with deionized water to neutrality, moved to a constant temperature drying oven at 60°C for drying, and ground to obtain graphene oxide powd...

Embodiment 1

[0040] (1) In a plastic cup, add 0.12g of graphene oxide and 10g of polyether polyol (NJ-330), mix well with an electric mixer at room temperature, then add 0.8g of sodium bicarbonate, 0.6g of silicone oil, 0.088 g of dibutyltin dilaurate (T-12), stir and mix well at room temperature;

[0041] (2) Quickly add 1.11g of isophorone diisocyanate (IPDI) into the plastic cup, stir well and stir for 15s, when bubbles appear in the mixture, stop stirring when it turns white rapidly, foam freely, and then place it in Cured in an oven at 104°C for 3 hours to obtain graphene oxide-polyurethane foam material (GO / PU-1);

[0042] (3) Add dye or heavy metal wastewater solution into a 25mL colorimetric tube, then add GO / PU-1 foaming material as an adsorbent, oscillate, and statically adsorb at room temperature, and use it for malachite green, Cd(II ) and other wastewater solutions, the measured adsorption rates were 53.32% and 91.47%.

Embodiment 2

[0044] (1) In a plastic cup, add 0.5g of graphene oxide and 10g of polyether polyol (NJ-330), mix well with an electric mixer at room temperature, then add 2g of sodium bicarbonate, 0.5g of silicone oil, 0.088g Dibutyltin dilaurate (T-12), stir and mix well at room temperature;

[0045] (2) Quickly add 2.3g of isophorone diisocyanate (IPDI) into the plastic cup, stir well and stir for 20s, when bubbles appear in the mixture, stop stirring when it turns white rapidly, foam freely, and then place it in Cured in an oven at 110°C for 2 hours to obtain graphene oxide-polyurethane foam material (GO / PU-2);

[0046] (3) Add dye or heavy metal wastewater solution into a 25mL colorimetric tube, then add GO / PU-2 foaming material as an adsorbent, oscillate, and statically adsorb at room temperature, and use it for malachite green, Cd(II ) and other wastewater solutions, the adsorption rates are 60.84% ​​and 94.56%, respectively.

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Abstract

The invention belongs to the field of high polymer material synthesis, and relates to preparation of a graphene oxide-polyurethane foam material, in particular to a preparation method and application of the graphene oxide-polyurethane foam material. The preparation method of the graphene oxide-polyurethane foam material comprises the following steps: firstly, preparing graphene oxide by adopting an improved Hummers method, then mixing and stirring graphene oxide, polyether glycol NJ-330, foaming agent, foam stabilizer and catalyst at room temperature, adding isophorone diisocyanate, and finally, foaming further to obtain the graphene oxide-polyurethane foam material. The graphene oxide-polyurethane foam material prepared through the method can be applied to absorption of coloring matters or heavy metal ions in waste water, and has better absorption and removal effects as shown in a test by taking a solution containing malachite green and Cd (II) as the absorption object. The application of the foam material to treatment of the coloring matters and the heavy metal ions in sewage has the characteristics of simplicity in operation and high absorption rate, and has a certain practical value.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, and relates to the preparation of a graphene oxide-polyurethane porous foaming material, in particular to a preparation method and application of a graphene oxide-polyurethane foaming material. Background technique [0002] my country is a big producer of dyestuffs, and the production and export volume has increased year by year, which has brought great pressure to environmental treatment. With the widespread use of dyes, a large amount of dye-containing wastewater is produced. These wastewaters are discharged into natural water bodies. They have the characteristics of high solubility, high chroma, refractory degradation and high toxicity, which affect aquatic photosynthesis and aquatic ecosystems. , so dye wastewater treatment has become a worldwide problem. The color of dyestuff is the root cause of the high chroma of wastewater from printing and dyeing industry, and finding stable an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/48C08K9/02C08K3/04C08J9/08C08J9/10C08L75/08B01J20/26C02F1/28C08G101/00C02F101/20C02F103/30
Inventor 邱凤仙秦佼荣新山杨冬亚
Owner JIANGSU UNIV
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