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Cellulose-based phenolic compound molecularly-imprinted adsorbing agent and preparation method thereof

A phenolic compound, molecular imprinting technology, applied in alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of uncontrollable molecular weight and structure, branching, affecting polymer properties, etc. High-value utilization, simple production process, and the effect of improving adsorption performance

Active Publication Date: 2016-06-15
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are defects in traditional free radical polymerization. For example, the nature of free radical polymerization (slow initiation, fast chain growth, easy chain termination and chain transfer, etc.) determines the runaway behavior of the polymerization reaction, and the result often leads to a wide distribution of polymerization products. , the molecular weight and structure are uncontrollable, sometimes even branching, cross-linking, etc., which seriously affect the performance of the polymer

Method used

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  • Cellulose-based phenolic compound molecularly-imprinted adsorbing agent and preparation method thereof
  • Cellulose-based phenolic compound molecularly-imprinted adsorbing agent and preparation method thereof
  • Cellulose-based phenolic compound molecularly-imprinted adsorbing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] The raw material components used in this embodiment are as follows:

[0089] Absorbent cotton: 0.62 kg;

[0090] Cellulose dissolving agent ([Bmim]Cl and dimethyl maple, the volume ratio of the two is 5:1): 24.8 kg;

[0091] Chloroacetyl chloride: 4.13 kg;

[0092] Cuprous bromide: 1.2 kg;

[0093] 2,2'-bipyridine: 1.26 kg;

[0094] Ascorbic acid: 0.36 kg;

[0095] Chloroform: 37.17 kg;

[0096] Methacrylic acid: 20.23 kg;

[0097] 2-Chlorophenol: 10.23 kg;

[0098] The specific steps are:

[0099] (1) Cellulose dissolution

[0100] 0.62 kg of pulverized absorbent cotton and 24.8 kg of cellulose dissolving agent were uniformly mixed, and stirred and dissolved at 80° C. for 1 hour under microwave-assisted conditions to obtain a homogeneous cellulose solution;

[0101] (2) Cellulose homogeneous esterification modification

[0102] Add 4.13 kg of chloroacetyl chloride to the cellulose homogeneous solution, adjust the temperature to 40°C, and stir for 1 hour. Afte...

Embodiment 2

[0125] The raw material components used in this embodiment are as follows:

[0126] Absorbent cotton: 0.89 kg;

[0127] Cellulose dissolving agent ([Emim]Cl and N,N dimethylformamide, 3:1): 35.61 kg;

[0128] Bromoisoacyl bromide: 5.46 kg;

[0129] Cuprous chloride: 3.01 kg;

[0130] N, N, N', N', N"-pentamethyldiethylenetriamine: 0.82 kg;

[0131] Stannous octoate: 1.04 kg;

[0132] Toluene: 23.81 kg;

[0133] 4-vinylpyridine: 18.49 kg;

[0134] 4-Chlorophenol: 10.87 kg;

[0135] The specific steps are:

[0136] (1) Cellulose dissolution

[0137] 0.89 kg of pulverized absorbent cotton and 35.61 kg of cellulose dissolving agent were uniformly mixed, and stirred and dissolved at 80° C. for 2 hours under microwave-assisted conditions to obtain a homogeneous cellulose solution;

[0138] (2) Cellulose homogeneous esterification modification

[0139] Add 5.46 kg of bromoisoacyl bromide to the cellulose homogeneous solution, adjust the temperature to 40°C, and stir for 2 h...

Embodiment 3

[0162] The raw material components used in this embodiment are as follows:

[0163] Masson pine pulp: 0.48 kg;

[0164] Cellulose dissolving agent ([Amim]Cl and N,N dimethylacetamide, 2:1): 19.2 kg;

[0165] 2-bromoisobutyryl bromide: 2.82 kg;

[0166] Nail bromide: 2.69 kg;

[0167] 2-Pyridine formaldehyde n-propylamine: 1.39 kg;

[0168] Vitamin C: 1.25 kg;

[0169] n-heptane: 23.59 kg;

[0170] 2-vinylpyridine: 24.26 kg;

[0171] 2-Nitrophenol: 24.32 kg;

[0172] The specific steps are:

[0173] (1) Cellulose dissolution

[0174] Uniformly mix 0.48 kg of masson pine pulp with 19.2 kg of cellulose dissolving agent, and stir and dissolve at 80° C. for 2 hours under microwave-assisted conditions to obtain a homogeneous cellulose solution;

[0175] (2) Cellulose homogeneous esterification modification

[0176] Add 2.82 kg of 2-bromoisobutyryl bromide to the cellulose homogeneous solution, adjust the temperature to 40°C, and stir for 2 hours. After the reaction, pour i...

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Abstract

The invention relates to a cellulose-based imprinted adsorbing agent which has the high-selectivity adsorption capacity on a phenolic pollutant in a solution and a preparation method of the cellulose-based imprinted adsorbing agent.The cellulose-based imprinted adsorbing agent is synthesized by adopting an active free radical polymerization method.The method comprises the steps that smashed cellulose is dissolved in a cellulose dissolving agent under the assistance of ultrasonic waves or microwaves, and then homogeneous-phase esterifying modification is performed on the cellulose to prepare a cellulose macroinitiator; the phenolic pollutant is taken as a template, a functional monomer, a hole generating agent, a catalyst and a coordination agent react under a certain condition, and after reacting is finished, template molecules are washed off to obtain the cellulose-based imprinted adsorbing agent for the phenolic pollutant.A static adsorption test is used for studying the adsorption balance, kinetics and selectivity recognition properties of the imprinted adsorbing agent.A result shows that the obtained cellulose-based imprinted adsorbing agent has the quick adsorption kinetics property and the superior phenolic pollutant molecule recognition property on the phenolic pollutant.

Description

technical field [0001] The invention relates to the fields of fine chemicals, environment-friendly materials and adsorbents, in particular to a cellulose-based phenolic compound molecularly imprinted adsorbent and a preparation method thereof. Background technique [0002] As important chemical raw materials, phenolic compounds are widely used in many industries such as petrochemical, printing and dyeing, pesticides and organic synthetic materials. into the natural water environment [1]. In recent years, the impact of these compounds on the environment has attracted widespread attention. Among the 129 priority pollutants issued by the US Environmental Protection Agency (EPA), there are 11 kinds of phenolic compounds [2]. The source water of 6 kinds of phenolic pollutants, methylphenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol, pentachlorophenol, and 4-nitrophenol, is the key treatment target[3,4 ], so the treatment of phenolic wastewater has attracted great attention from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
CPCB01J20/268B01J2220/4825C02F1/285C02F2101/345
Inventor 林春香骆微刘以凡朱墨书棋苏巧权刘明华
Owner FUZHOU UNIV
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