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Amine-modified fibrous emergent absorbing material and preparation method thereof

An adsorption material and fibrous technology, applied in the field of fibrous emergency adsorption materials and its preparation, to achieve the effect of simple synthesis process steps, low price, and cheap and easy-to-obtain raw materials

Active Publication Date: 2012-06-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantages of the existing fibrous adsorbent materials such as difficult source of matrix, cumbersome preparation process and low adsorption capacity, the present invention provides an amine-modified fibrous emergency adsorbent material and its preparation method, a simple and easy method is used to pretreat polyethylene terephthalate (PET), and a new type of fibrous emergency adsorption material containing amine groups is prepared through grafting reaction and amidation reaction

Method used

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  • Amine-modified fibrous emergent absorbing material and preparation method thereof
  • Amine-modified fibrous emergent absorbing material and preparation method thereof
  • Amine-modified fibrous emergent absorbing material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Use 5 g of PET and add 200 ml of ethanol to extract in a Soxhlet extractor for 4 hours, put it in a 3-neck bottle after drying, add 100 ml of DMF to swell for 4 hours. Make an emulsion with 100 ml of acrylic acid, 200 ml of toluene, 100 ml of Tween-80, and 600 ml of water. Pour the emulsion into a 3-neck bottle equipped with PET, add 1 g of benzoyl peroxide, heat in a water bath at 95° C., and stir the reaction at a speed of 60 r / min for 18 hours, and perform solid-night separation of the obtained PET-AA. Wash with acetone and allow to dry. Mix PET-AA with 1500 ml of ethylenediamine solution with a concentration of 4%, react at 40°C with a stirring rate of 100r / min for 8-12h, and vacuum dry at 50°C to obtain the finished fibrous emergency adsorption material PET-AA- N1. Its physical and chemical properties are as follows:

[0040]

Embodiment 2

[0042]Use 5 g of PET and add 200 ml of acetone to extract it in a Soxhlet extractor for 4 hours, dry it and place it in a 3-neck bottle, add 100 ml of dichloroethane to swell for 4 hours. Mix 150ml of acrylic acid, 300ml of dichloroethane, 150ml of OE-6, and 500ml of water into an emulsion. Pour the emulsion into a 3-neck bottle filled with PET, add 2g of diacyl peroxide, heat in a water bath at 92°C, and stir the reaction at a speed of 60r / min for 24 hours, conduct solid-night separation of the obtained PET-AA, and use Acetone washed, dried, and the grafting rate of PET-AA obtained by weighing was 420%. Mix PET-AA with 1500 ml of ethylenediamine solution with a concentration of 6%, react at 40°C with a stirring rate of 100r / min for 8-12h, and vacuum dry at 50°C to obtain the finished fibrous emergency adsorption material PET-AA- N2. Its physical and chemical properties are as follows:

[0043]

Embodiment 3

[0045] Add 200 ml of petroleum ether to 5 g of PET and extract in a Soxhlet extractor for 4 hours, place it in a 3-necked bottle after drying, add 150 ml of toluene to swell for 4 hours. Make an emulsion with 200ml of acrylic acid, 200ml of toluene, 100ml of diglycerin polypropylene glycol ether, and 500ml of water. Pour the emulsion into a 3-neck bottle filled with PET, add 2 g of azobisethylbutyronitrile, heat in a water bath at 95°C, and stir the reaction at a speed of 60r / min for 24 hours. Separated, washed with acetone, dried, and weighed the grafted rate of PET-AA was 540%. Mix PET-AA with 1500 ml of 8% propylenediamine solution, react at 40°C with a stirring rate of 100r / min for 8-12h, and vacuum dry at 50°C to obtain the finished fibrous emergency adsorption material PET-AA- N3. Its physical and chemical properties are as follows:

[0046]

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Abstract

The invention discloses an amine-modified fibrous emergent absorbing material and a preparation method thereof and belongs to the field of synthesis and application of environmental materials. According to the invention, an artificially-synthesized high molecular material is adopted as a matrix, and the amine-modified fibrous emergent absorbing material is prepared by graft polymerization and amination reaction; and the basic structural formula is shown in the specification; the average diameter of the amine-modified fibrous emergent absorbing material is 40-60mum, and the content of amino groups is 5-8mmol / g. The synthesis method is simple, raw materials are low in prices, and the prepared fibrous emergent absorbing material is large in toughness and high in mechanical strength, has a high-hydrophilicity surface, and can remove multiple heavy metal ions in water fast and efficiently by virtue of the action of surface groups; and the balanced absorption time for the heavy metal ions such as nickel, copper, lead and the like is only about 10 minutes, and the absorbed fiber is easy to recover and can be used repeatedly after regeneration. The amine-modified fibrous emergent absorbing material disclosed by the invention is especially applicable to emergent disposal for unexpected heavy-metal water pollution events occurring to natural water bodies such as river channels and lakes and the like.

Description

technical field [0001] The invention discloses an amine-modified fibrous emergency adsorption material and a preparation method thereof, more specifically, an amine-modified emergency adsorption fiber based on a PET matrix and a preparation method thereof. Background technique [0002] In recent years, sudden environmental pollution incidents have occurred frequently, especially water pollution incidents caused by heavy metal pollution. How to quickly and efficiently remove heavy metal ions in water has become a hot issue in the field of water pollution control research. Resin-based adsorbents based on polymer materials have the advantages of large adsorption capacity, adjustable structure, and easy regeneration, and are widely used in the field of wastewater treatment. However, the traditional granular resin has the following deficiencies in dealing with sudden water pollution accidents: 1) Granular resin needs to be in contact with the polluted water body in the adsorpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30D06M14/14D06M13/332C02F1/28C02F1/62
Inventor 王津南程澄孟颖许丽杨欣
Owner NANJING UNIV
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