Method for preparing composite cellulose porous imprinting adsorbent

A technology of imprinted adsorption and cellulose, applied in the direction of selective adsorption, chemical instruments and methods, ion exchange, etc., to achieve the effect of favorable adsorption capacity, high mechanical properties and good adsorption performance

Inactive Publication Date: 2014-12-03
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, the solid particles for preparing PickeringHIPEs include silicon dioxide, ferroferric oxide, etc. Compared with the above-mentioned inorganic materials, biological materials such as cellulose have the characteristics of cheapness, n

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  • Method for preparing composite cellulose porous imprinting adsorbent

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[0032] Example 1:

[0033] 1. A preparation method of cellulose composite porous imprinting adsorbent, according to the following steps:

[0034] (1) Preparation of NCCs:

[0035] The medical absorbent cotton was mixed with 50% concentrated sulfuric acid solution at a ratio of 1g:60ml, stirred at 50°C for 3h, the NCCs produced were washed with a large amount of deionized water and dialyzed to neutrality, and the prepared colloidal suspension was refrigerated at 5°C for use.

[0036] (2) Preparation of MIPFs

[0037] The template molecule 4-NP and the functional monomer AM are dissolved in the NCCs colloidal suspension, where the ratio of 4-NP, AM to the suspension is 0.5mmol: 10mmol: 3ml, placed in the dark and allowed to stand for 5h to form a pre-assembly Solution, add cross-linking agent MBAM, surfactant Tween 85, initiator potassium persulfate, and ultrasonic for 1 min to form an aqueous phase (w). The dosage ratio of pre-assembly solution, MBAM, Tween 85, and potassium persulfate ...

Example Embodiment

[0046] Example 2:

[0047] 1. A preparation method of cellulose composite porous imprinting adsorbent, according to the following steps:

[0048] (1) Preparation of NCCs:

[0049] The medical absorbent cotton was mixed with 70% concentrated sulfuric acid solution at a ratio of 3g:100ml, stirred at 70°C for 6h, the resulting NCCs were washed with a large amount of deionized water and dialyzed to neutrality, and the prepared colloidal suspension was refrigerated at 5°C for use.

[0050] (2) Preparation of MIPFs

[0051] The template molecule 4-NP and the functional monomer AM are dissolved in the NCCs colloidal suspension, where the ratio of 4-NP, AM to the suspension is 0.5mmol: 20mmol: 6ml, placed in the dark and allowed to stand for 10 hours to form a pre-assembly Solution, add cross-linking agent MBAM, surfactant Tween 85, initiator potassium persulfate, and ultrasonic for 1 min to form an aqueous phase (w). The dosage ratio of pre-assembly solution, MBAM, Tween 85 and potassium pers...

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Abstract

The invention belongs to the technical field of environment-friendly functional materials and particularly relates to a method for preparing a composite cellulose porous imprinting adsorbent. The method comprises the following steps: firstly extracting nano-crystalline celluloses (NCCs) from medicinal degreasing cotton by virtue of an acid hydrolysis method, adding 4-nitrophenol (4-NP) serving as a template molecule, acrylamide (AM) serving as a functional monomer, N,N'-methylene-bisacrylamide (MBAM) serving as a crosslinker, Tween 85 serving as a surfactant and potassium persulfate serving as an initiator into an NCCs colloidal suspension serving as a water phase and liquid paraffin serving as an oil phase, preparing oil-in-water (o/w) Pickering high internal phase emulsions (HIPEs) and carrying out thermally initiated polymerization to prepare the composite cellulose porous imprinting adsorbent, wherein the adsorbent is used for selectively identifying and adsorbing 4-NP in the solution. The adsorption test results show that the imprinting adsorbent prepared by the invention has good adsorption capacity, relatively rapid dynamic performance and selective identification performance on 4-NP.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental protection functional materials, and in particular relates to a preparation method of a cellulose composite porous imprinted adsorbent. Background technique [0002] Molecular imprinting technology (MIT) is a method of preparing polymers with specific recognition ability for a specific molecule. The prepared polymers are called molecularly imprinted polymers (MIPs). When template molecules come into contact with polymer monomers, multiple Points of action, through the polymerization process, this effect will be memorized. When the template molecule is removed, a cavity with multiple action points matching the spatial configuration of the template molecule will be formed in the polymer. Template molecules and their analogs have selective recognition properties. [0003] Porous materials are three-dimensional structures formed by the aggregation of a large number of polyhedral-...

Claims

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Application Information

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IPC IPC(8): C08F251/02C08F220/06C08F2/44C08J9/28B01J20/26B01D15/08
Inventor 朱文静李春香马威潘建明瞿琴
Owner JIANGSU UNIV
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