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Preparation method for double-temperature-sensitive type mesoporous imprinted polymer

An imprinted polymer, temperature-sensitive technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems affecting the adsorption performance of imprinted polymers, lack of imprinted sites, etc. The effect of adsorption capacity, excellent temperature-sensitive characteristics

Active Publication Date: 2017-04-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, RAFT polymerization is a thermally initiated polymerization process, and the polymerization temperature is relatively high. However, due to the sensitivity of temperature-sensitive polymers to temperature, temperature-sensitive polymers have specific memory functions for polymerization temperature. When the ambient temperature and imprinting polymerization When the temperature is very different, it will cause the obvious loss of imprinted sites, which will greatly affect the adsorption performance of the imprinted polymer. Good adsorption performance at room temperature
To the best of our knowledge, so far, there is no report on the preparation of dual temperature-sensitive imprinted polymers using room temperature light-induced RAFT polymerization to simultaneously achieve controllable recognition of target pollutants and temperature-controlled separation of adsorbents.

Method used

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  • Preparation method for double-temperature-sensitive type mesoporous imprinted polymer
  • Preparation method for double-temperature-sensitive type mesoporous imprinted polymer
  • Preparation method for double-temperature-sensitive type mesoporous imprinted polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of SBA-15 and its vinylation modification

[0034] Take 200mg of SBA-15 and place it in a round bottom flask, add 100mL of it to a concentration of 3mol L -1 hydrochloric acid, refluxed for 10 hours, then filtered, washed repeatedly with deionized water twice until neutral, vacuum dried at 80°C for 6 hours, and then taken out. Add activated SBA-15 and γ-(methacryloyloxy)propyltrimethoxysilane to 10-40mL toluene solution sequentially, in which 10mL γ-(methacryloyloxy) is added per gram of SBA-15 Propyltrimethoxysilane was refluxed in an oil bath for 24h under the protection of nitrogen. After the reaction, the product was successively washed three times with toluene and ethanol to remove unreacted coupling agent and toluene, and vacuum-dried to obtain a vinyl-functionalized mesoporous material (SBA-15-MPS).

[0035] (2) Preparation of monolayer thermosensitive imprinted polymer (T-IIP)

[0036] Before the start of the polymerization reaction, 15.4 mg o...

Embodiment 2

[0047] (1) The preparation of SBA-15 and its vinylation modification were carried out according to Example 1 to obtain a vinyl-functionalized mesoporous material (SBA-15-MPS).

[0048] (2) Preparation of monolayer thermosensitive imprinted polymer (T-IIP)

[0049] Before the start of the polymerization reaction, 30.8 mg of Cd(NO 3 ) 2 4H 2O and 34 μL MAA were added to 5 mL of ethanol aqueous solution (ethanol: water = 1:9, v / v, the same below), oscillated to disperse evenly, and stood in a dark place for 12 hours. Then, add 50mg of SBA-15-MPS into 20mL ethanol aqueous solution in a quartz stoppered Erlenmeyer flask, after ultrasonic dispersion, add 128mg NIPMAM, 154mg MBA, 30mg BDMAT and 20μL HMPF. After shaking and dispersing evenly, stir with magnetic force, and then seal with nitrogen gas for 20 minutes. Then, in a photochemical reaction apparatus (mercury lamp, 250W), control the internal temperature of the apparatus to room temperature (25° C.), and react with light ...

Embodiment 3

[0058] (1) The preparation of SBA-15 and its vinylation modification were carried out according to Example 1 to obtain a vinyl-functionalized mesoporous material (SBA-15-MPS).

[0059] (2) Preparation of monolayer thermosensitive imprinted polymer (T-IIP)

[0060] Before the start of the polymerization reaction, 15.4 mg of Cd(NO 3 ) 2 4H 2 O and 17 μL MAA were added to 5 mL of ethanol aqueous solution (ethanol: water = 1:9, v / v, the same below), oscillated to disperse evenly, and stood in a dark place for 12 hours. Then, add 100mg of SBA-15-MPS into 20mL ethanol aqueous solution in a quartz stoppered Erlenmeyer flask, after ultrasonic dispersion, add 56mg NIPMAM, 77mg MBA, 20mg BDMAT and 10μL HMPF. After shaking and dispersing evenly, stir with magnetic force, and then seal with nitrogen gas for 20 minutes. Then, in a photochemical reaction apparatus (mercury lamp, 250W), control the internal temperature of the apparatus to room temperature (25° C.), and react with light ...

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Abstract

The invention provides a preparation method for double-temperature-sensitive type mesoporous imprinted polymer. The preparation method comprises the following steps: step 1, preparing polymer precursor; step 2, preparing single-temperature-sensitive imprinted polymer; and step 3, preparing the double-temperature-sensitive type imprinted polymer. The preparation method is used for preparing new double-temperature-sensitive type imprinted polymer based on a mesoporous material; the material has excellent temperature sensitive characteristic, has relatively great adsorption capacity on metal ions, and has high selectivity, remarkable separation effect and many reuse times. The preparation method provides a novel method for selectively separating and enriching pollutants in environment.

Description

technical field [0001] The invention relates to a preparation method and application of a dual-temperature-sensitive mesoporous imprinted polymer, which belongs to the fields of material preparation, separation technology and environmental treatment. Background technique [0002] Cadmium ions are one of the heavy metal elements that are harmful to the human body. They can be continuously enriched in the human body through the food chain and cannot be degraded in the human body. Even very low levels of cadmium ions are extremely harmful to human health. It is listed as one of the priority monitoring pollutants in water by countries all over the world. Therefore, it is of great significance to selectively and efficiently remove cadmium ions in water. Adsorption is an effective and low-cost method for dealing with heavy metal ions. However, since cadmium usually exists in trace amounts and is affected by other interferences, it is difficult to detect and separate cadmium ions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/06C08F220/54C08F222/38C08F2/48B01J20/26B01J20/30
CPCB01J20/268C08F2/48C08F292/00C08F220/06C08F220/54C08F222/385
Inventor 胡肖刘燕刘占超倪良吴维富
Owner JIANGSU UNIV
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