Amphoteric polysaccharide/cross-linked graphene oxide double-network composite hydrogel adsorption material and preparation method thereof

A composite hydrogel and adsorption material technology, applied in the field of amphoteric polysaccharide/cross-linked graphene oxide double network composite hydrogel adsorption material and its preparation, can solve the problems of graphene agglomeration, reduction of specific surface area, etc. The effect of improving adsorption performance, low price and wide source

Active Publication Date: 2018-01-12
YANCHENG INST OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Graphene has the characteristics of large specific surface area and excellent mechanical prop

Method used

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Experimental program
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Example Embodiment

[0015] Example 1

[0016] After 0.1 g of cellulose was dissolved in 2.5 g of 7wt% NaOH / 12wt% urea aqueous solution with stirring at low temperature, 1 g of [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfonic acid propyl group was added. ) ammonium hydroxide, 0.04 g of cerium ammonium nitrate, and 0.03 g of N,N'-methylenebisacrylamide, stirred and dissolved to obtain a homogeneous solution. The homogeneous solution is added to the graphene oxide dispersion liquid, and the mass ratio of graphene oxide to cellulose is 1:10. After mixing uniformly, the solution is placed in a microwave reactor. The microwave power was adjusted to 800 watts, and the reaction time was 3 minutes to carry out graft polymerization. The obtained single-network composite hydrogel was soaked in pure water, washed and freeze-dried to obtain a dry gel. The above dry gel was soaked in an aqueous solution of hexamethylenediamine, and reacted at 80° C. for 24 hours to obtain a double-network composite hydrogel ad...

Example Embodiment

[0017] Example 2

[0018] Dissolve 0.5g starch in 10mL water, add 1g methacryloyloxyethyltrimethylammonium chloride and 1g sodium methacrylate, 0.1g potassium persulfate, 0.075g N,N'-methylenebisacrylamide , a homogeneous solution is obtained after stirring and dissolving. The homogeneous solution is added to the graphene oxide dispersion liquid, and the mass ratio of graphene oxide to starch is 1:20. After mixing uniformly, the solution is placed in a microwave reactor. The microwave power was adjusted to 400 watts, and the reaction time was 5 minutes to carry out graft polymerization. The obtained single-network composite hydrogel was soaked in pure water, washed and freeze-dried to obtain a dry gel. The above dry gel was soaked in an aqueous solution of hyperbranched polyethyleneimine, and reacted at 80° C. for 12 hours to obtain a double-network composite hydrogel adsorption material.

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Abstract

The invention discloses an amphoteric polysaccharide/cross-linked graphene oxide double-network composite hydrogel adsorption material and a preparation method thereof. The preparation method comprises the following steps: firstly, after uniformly mixing graphene oxide, a polysaccharide and an amphoteric ionic monomer (or a mixture of a cationic monomer and an anionic monomer), preparing single-network composite hydrogel through a microwave assisted grafting and copolymerization manner; then, crossly linking the single-network composite hydrogel with the graphene oxide in a water solution of apolyamino or amino-terminated polymer to obtain the double-network composite hydrogel adsorption material. The double-network composite hydrogel adsorption material prepared by the preparation methodhas excellent mechanical properties and can be used for removing heavy metal ions and organic pollutants at the same time; the double-network composite hydrogel adsorption material has a relatively high adsorption amount and a relatively rapid adsorption speed on the heavy metal ions and the organic pollutants.

Description

technical field [0001] The invention relates to an amphoteric polysaccharide / cross-linked graphene oxide double network composite hydrogel adsorption material and a preparation method thereof, belonging to the field of environmental functional materials. Background technique [0002] Due to the influence of various factors such as industrial wastewater discharge and landfill disposal of urban waste, the compound pollution in which heavy metal ions and organic matter coexist in the environment has become the main form of environmental pollution. These pollutants can not only cause the deterioration of the ecological environment, but also may enter the food chain, thereby causing harm to human health. Therefore, it is of great significance to develop efficient treatment methods and technologies that can simultaneously remove heavy metals and organic pollutants. [0003] At present, the treatment methods for simultaneously removing heavy metal ions and organic pollutants inclu...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30
Inventor 王静静
Owner YANCHENG INST OF TECH
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