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Preparation and application for amine-terminated hyperbranched polymer grafted graphene oxide magnetic anion adsorbent

A technology of amino-terminated hyperbranching and polymers, which is applied in the fields of alkali metal compounds, adsorbed water/sewage treatment, alkali metal oxides/hydroxides, etc., and can solve the problem of low density of functional groups of adsorbents and solid-liquid separation of adsorbents Difficult and unsatisfactory effects, etc., to achieve the effect of not easy to decompose, stable structure and high density

Active Publication Date: 2018-12-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the two main problems of traditional adsorbents are: first, the density of functional groups on the surface of the adsorbent is low, the adsorption capacity of the adsorbent for pollutants is small, and the adsorption efficiency is low; second, the solid-liquid separation of the adsorbent is difficult
Graphene oxide is a new type of two-dimensional nanomaterial, the surface is rich in hydroxyl, carboxyl and epoxy groups, and has a certain dispersion ability in water, but the effect of simple graphene oxide as an adsorbent is not very ideal.

Method used

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  • Preparation and application for amine-terminated hyperbranched polymer grafted graphene oxide magnetic anion adsorbent
  • Preparation and application for amine-terminated hyperbranched polymer grafted graphene oxide magnetic anion adsorbent
  • Preparation and application for amine-terminated hyperbranched polymer grafted graphene oxide magnetic anion adsorbent

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Effect test

Embodiment 1

[0042] 1. a preparation method of an amino-terminated hyperbranched polymer grafted graphene oxide magnetic anion adsorbent, comprising steps as follows:

[0043] (1) Mix 0.5mol of diethylenetriamine with 50mL of anhydrous methanol, place at 0°C, and pass through N 2, after stirring for 10 min, the mixed solution of 1mol methyl acrylate (MA) and 50 mL of anhydrous methanol was slowly added dropwise to the mixed solution of diethylenetriamine and methanol, and Michael addition occurred between diethylenetriamine and methyl acrylate (MA). The resulting reaction yields a light yellow liquid which is the hyperbranched polymer precursor (intermediate product). Then transfer the obtained precursor to the round-bottomed flask of the rotary evaporator, and keep it at 60°C for 2h under the vacuum condition of the circulating water vacuum pump, and distill the solvent methanol under reduced pressure; then raise the temperature to 120°C and 140°C in sequence Keep stirring each vacuum co...

Embodiment 2

[0052] 1. a preparation method of an amino-terminated hyperbranched polymer grafted graphene oxide magnetic anion adsorbent, comprising steps as follows:

[0053] (1) Mix 0.5mol triethylenetetramine with 50mL of anhydrous methanol, place at 0°C, and pass through N 2 , after stirring for 10 min, the mixed solution of 1mol methyl acrylate (MA) and 50 mL of anhydrous methanol was slowly added dropwise to the mixed solution of triethylenetetramine and methanol, and Michael addition occurred between triethylenetetramine and methyl acrylate (MA). The resulting reaction yields a light yellow liquid which is the hyperbranched polymer precursor (intermediate product). Then transfer the obtained precursor to the round-bottomed flask of the rotary evaporator, and keep it at 60°C for 2h under the vacuum condition of the circulating water vacuum pump, and distill the solvent methanol under reduced pressure; then raise the temperature to 120°C and 140°C in sequence Keep stirring each vacuu...

Embodiment 3

[0062] 1. a preparation method of an amino-terminated hyperbranched polymer grafted graphene oxide magnetic anion adsorbent, comprising steps as follows:

[0063] (1) Mix 1mol of tetraethylenepentamine with 50mL of anhydrous methanol, place at 0°C, and pass through N 2 , after stirring for 10 min, the mixed solution of 0.5mol methyl acrylate (MA) and 50 mL of anhydrous methanol was slowly added dropwise to the mixed solution of tetraethylenepentamine and methanol, tetraethylenepentamine and methyl acrylate (MA) produced Michael Addition reaction, the light yellow liquid obtained is the hyperbranched polymer precursor (intermediate product). Then transfer the obtained precursor to the round-bottomed flask of the rotary evaporator, and keep it at 60°C for 2h under the vacuum condition of the circulating water vacuum pump, and distill the solvent methanol under reduced pressure; then raise the temperature to 120°C and 140°C in sequence Keep stirring each vacuum compression polym...

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Abstract

The invention discloses preparation and an application for an amine-terminated hyperbranched polymer grafted graphene oxide magnetic anion adsorbent. According to the preparation method, a Michael addition reaction and a polycondensation reaction are performed by an amination reagent and methyl acrylate to obtain an amine-terminated hyperbranched polymer; then the amine-terminated hyperbranched polymer is grafted onto magnetic graphene oxide under an alkaline condition; and the amine-terminated hyperbranched polymer grafted graphene oxide magnetic anion adsorbent is obtained through washing and drying. The prepared amine-terminated hyperbranched polymer grafted graphene oxide magnetic anion adsorbent contains an amino functional group with high density, the functional group showing electropositivity amino can achieve high enrichment and rapid removal of anion pollutants showing electronegativity, and therefore, the adsorbent has a high adsorption capacity for the anion pollutants, especially Cr (VI).

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to the preparation and application of an amino-terminated hyperbranched polymer grafted graphene oxide magnetic anion adsorbent. Background technique [0002] With the development of industry, the problem of water pollution is becoming more and more serious, and the problem of anion pollution, especially Cr(VI) pollution, cannot be ignored. Cr(VI) is a heavy metal ion with high toxicity and serious pollution in the environment, because heavy metal ions are not biodegradable and can exist in the environment for a long time. Therefore, for the health of human life, it is an important issue to effectively solve the problem of anion pollution, especially Cr(VI) pollution. The adsorption method realizes the separation and removal of pollutants through the different functions of material surface modification, electronic regulation and pore interaction to achieve high-fold enrichm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C08G83/00C02F1/28
CPCB01J20/262B01J20/28009B01J20/3085C02F1/285C02F2303/16C08G83/005C08G83/006
Inventor 韦海朝孔巧平韦景悦吴海珍
Owner SOUTH CHINA UNIV OF TECH
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