Molecular bottle brush type reverse phase adsorbent as well as preparation method and application thereof

A technology of particles and initiators, which is applied in the field of separation material preparation, can solve the problems of difficulty in obtaining sensitivity, etc., and achieve the effects of good repeatability, simple synthesis conditions and high adsorption capacity

Inactive Publication Date: 2017-11-24
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A small amount of BPA can permeate from the plastic into the environmental matrix when heated or exposed to acid and alkali substances. However, due to the complexity of the environmental matrix and the low content of the target substance, it is difficult to obtain better sensitivity by direct analysis, so efficient separation Enrichment is the key to accurate analysis of bisphenol A in the environment

Method used

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  • Molecular bottle brush type reverse phase adsorbent as well as preparation method and application thereof
  • Molecular bottle brush type reverse phase adsorbent as well as preparation method and application thereof
  • Molecular bottle brush type reverse phase adsorbent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 magnetic graphene preparation

[0032] 0.225 g graphene oxide, 0.6075 g anhydrous FeCl 3 Disperse in 60 mL ethylene glycol, ultrasonically disperse (5~6h), then add 0.225 g sodium citrate, 2.7 g sodium acetate, 1.5 g polyethylene glycol-10000, magnetically stir for 30 min, and transfer to a reaction kettle at 200 °C reaction at room temperature for 12 h, cooled to room temperature, alternately washed with water and ethanol, and vacuum-dried at 50°C to obtain magnetic graphene, see figure 1 , figure 2 b, image 3 a.

Embodiment 2

[0033] Embodiment 2 Preparation of dopamine-coated magnetic graphene

[0034] Disperse 1.0 g of magnetic graphene in 300 mL of Tris-HCl (10 mM pH 8.5) buffer, sonicate for 30 min under mechanical stirring, then add 0.6 g of dopamine, stir mechanically at room temperature for 10 h, wash with water and ethanol, and vacuum at 50 °C Dry, dopamine-coated magnetic graphene, see figure 2 c, image 3 b.

Embodiment 3

[0035] Example 3 Preparation of Molecular Bottlebrush Type Reversed-Phase Adsorption Material Using Dopamine-coated Magnetic Graphene as a Matrix

[0036] Disperse 0.5 g dopamine-coated magnetic graphene in 20 mL redistilled tetrahydrofuran, stir mechanically under ice bath for 30 min, then add 1 mL triethylamine, 1 mL 2-bromoisobutyryl bromide, and ice bath for 3 h, stirred mechanically at 35°C for 12 h, washed three times with tetrahydrofuran, washed with water and methanol, and dried under vacuum at 50°C to obtain primary grafting initiator particles.

[0037] Disperse 0.4 g primary grafting initiator particles, 2.4 mL 2-hydroxyethyl methacrylate (HEMA), 0.1237 g 2,2'-bipyridine (Bpy) in 10 mL redistilled N,N'-dimethyl In formamide (DMF), freeze, vacuum cycle twice, add 0.0568 g cuprous bromide, freeze again, vacuum cycle twice, mechanically stir at 70 °C for 16 h, wash with DMF, methanol, water, wash with EDTANa 2 (0.25 M) / methanol=1 / 1(V / V) Complexation at 40 °C for 4 h, ...

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PUM

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Abstract

The invention discloses a molecular bottle brush type reverse phase adsorbent and a preparation method thereof. The molecular bottle brush type reverse phase adsorbing material is obtained by taking hydroxyethyl methacrylate containing an ethylenic bond and styrene as monomers and sequentially polymerizing on the surface of dopamine-coated magnetic graphene through an atom transfer radical polymerization (ATRP) method. A separating material disclosed by the invention has the characteristics of high adsorption capacity and long service life, and can be used for enriching and quantitatively analyzing bisphenol A in environmental water, so that the separating and enriching efficiency of the bisphenol A can be greatly improved.

Description

technical field [0001] The invention relates to a molecular bottlebrush type adsorbent and a preparation method thereof, belonging to the technical field of separation material preparation. Background technique [0002] Endocrine disruptors (EDs) are potentially harmful to human health. They not only interfere with the production of hormones, but also damage the growth, metabolism and reproductive functions of organisms. Among many endocrine disruptors, bisphenol A (BPA) has attracted widespread attention due to its widespread existence and toxicity. BPA is widely used in the synthesis of industrial chemicals such as epoxy resins, polycarbonates and other plastics. A small amount of BPA can permeate from the plastic into the environmental matrix when heated or exposed to acid and alkali substances. However, due to the complexity of the environmental matrix and the low content of the target substance, it is difficult to obtain better sensitivity by direct analysis, so effici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/34
CPCB01J20/20B01J20/06B01J20/22B01J20/264B01J20/28007B01J20/28009C02F1/28C02F1/281C02F1/285C02F2101/345
Inventor 王超展李春艳卫引茂
Owner NORTHWEST UNIV(CN)
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