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A kind of preparation method of cellulose composite porous imprinted adsorbent

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

Inactive Publication Date: 2016-09-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, the solid particles used to prepare Pickering HIPEs include silicon dioxide, ferroferric oxide, etc. Compared with the above-mentioned inorganic materials, biological materials such as cellulose have the characteristics of cheapness, non-toxicity, wide range of sources and high mechanical strength. They are used as stable particles to stabilize Pickering HIPEs The preparation of porous materials and their application in molecular imprinting technology has not been reported yet

Method used

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  • A kind of preparation method of cellulose composite porous imprinted adsorbent

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Embodiment 1

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

[0034] (1) Preparation of NCCs:

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

[0036] (2) Preparation of MIPFs

[0037] Dissolve the template molecule 4-NP and the functional monomer AM in the NCCs colloidal suspension, wherein the ratio of 4-NP, AM to the suspension is 0.5mmol: 10mmol: 3ml, and place it in the dark for 5h to form a pre-assembled Solution, add crosslinking agent MBAM, surfactant Tween 85, initiator potassium persulfate, ultrasonic 1min, form water phase (w), the dosage ratio of pre-assembly solution, MBAM, Tween 85, potassium persulfate is 3ml: 1mmol: 0.1ml: 0.02g;...

Embodiment 2

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

[0048] (1) Preparation of NCCs:

[0049] 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 obtained colloidal suspension was refrigerated at 5°C for later use.

[0050] (2) Preparation of MIPFs

[0051] Dissolve the template molecule 4-NP and the functional monomer AM in the NCCs colloidal suspension, wherein the ratio of 4-NP, AM to the suspension is 0.5mmol: 20mmol: 6ml, and place it in the dark for 10h to form a pre-assembled Solution, add cross-linking agent MBAM, surfactant Tween 85, initiator potassium persulfate, ultrasonic 1min, form water phase (w), the dosage ratio of pre-assembly solution, MBAM, Tween 85, potassium persulfate is 6ml: 4mmol: 0.3ml: 0.04g; t...

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Abstract

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. First, nanocellulose (NCCs) was extracted from medical absorbent cotton by acid hydrolysis, and then the NCCs colloidal suspension was used as the aqueous phase (w), in which template molecule p-nitrophenol (4‑NP), functional monomer acrylamide ( AM), crosslinking agent N,N'-methylenebisacrylamide (MBAM), surfactant Tween 85, initiator potassium persulfate, liquid paraffin as oil phase (o), prepared oil-in-water (o / w) of Pickering (Pickering) high internal phase emulsion (HIPEs), thermally induced polymerization to prepare cellulose composite porous imprinted adsorbent, and the adsorbent is used for the selective recognition and adsorption of 4-NP in the solution. The results of the adsorption test show that the imprinted adsorbent prepared by the present invention has better adsorption capacity, faster kinetic performance and selective recognition performance for 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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Patent Type & Authority Patents(China)
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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