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Recyclable carbon fiber adsorbent and its preparation and application

A carbon fiber and adsorbent technology, applied in the field of recyclable carbon fiber adsorbent, can solve the problems of secondary pollution of water body and poor recycling performance.

Active Publication Date: 2020-01-31
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, although it has been reported that activated carbon can be used as an adsorbent to pretreat water bodies, it can only remove solid impurity particles, oil stains, etc. in water bodies; The prolongation of time will cause secondary pollution to the water body

Method used

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  • Recyclable carbon fiber adsorbent and its preparation and application
  • Recyclable carbon fiber adsorbent and its preparation and application
  • Recyclable carbon fiber adsorbent and its preparation and application

Examples

Experimental program
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preparation example Construction

[0077] The present invention also provides a kind of preparation method of described carbon fiber adsorbent, comprises the steps:

[0078] 1) provide carbon fiber material, first modification solution and second modification agent, wherein,

[0079] The first modification solution includes a first modification agent and a first solvent;

[0080] 2) under stirring conditions, adding the carbon fiber material into the first modification solution, heating the resulting mixture, and reacting to obtain a mixture containing the carbon fiber material modified by the first modifier;

[0081] 3) Add the second modifying agent into the reaction mixture obtained in step 2) under stirring condition, and react to obtain the carbon fiber adsorbent modified by the copolymer of the first modifying agent and the second modifying agent.

[0082] In another preferred example, the first solvent is anhydrous acetonitrile.

[0083] In another preferred example, the first modifier and the second m...

Embodiment 1

[0114] Embodiment 1 carbon fiber adsorbent 1

[0115] (1) Carbon fiber activation treatment: immerse 2g polyacrylonitrile (PAN) carbon fiber in 400mL concentrated hydrochloric acid solution, stir and react at a constant temperature of 90°C for 2h, cool to room temperature, wash with deionized water until neutral, and dry in vacuum at 80°C. Activated carbon fiber (CFO) 1 with a diameter of about 6.75 μm was obtained;

[0116] (2) Organic carbon fiber treatment: in the round bottom flask, add 0.3g hexachlorocyclotriphosphazene respectively

[0117] (HCCP), 30mL of anhydrous acetonitrile, 0.2g of activated carbon fiber 1, 3mL of triethylamine was added dropwise, the temperature was raised to 40°C with stirring, and the reaction was carried out at a constant temperature of 40°C for 1 hour to obtain HCCP-grafted organic carbon fiber (HCCP-CFO) 2 ;

[0118] (3) Preparation of poly(cyclotriphosphazene-co-4,4'-dihydroxydiphenylsulfone) microspheres modified carbon fiber adsorbent: i...

Embodiment 2

[0125] Embodiment 2 carbon fiber adsorbent 2

[0126] (1) Carbon fiber activation treatment: immerse 2g polyacrylonitrile (PAN) carbon fiber in 500mL concentrated hydrochloric acid solution, stir and react at a constant temperature of 100°C for 2h, cool to room temperature, wash with deionized water until neutral, and dry in vacuum at 80°C. Get activated carbon fiber (CFO) 2;

[0127] (2) Organic carbon fiber treatment: In a round bottom flask, add 1g hexachlorocyclotriphosphazene (HCCP), 40mL anhydrous acetonitrile, 0.2g activated carbon fiber 2, drop 5mL triethylamine, and heat up to 40°C, react at a constant temperature of 40°C for 1 hour to prepare HCCP-grafted organic carbon fiber (HCCP-CFO) 2;

[0128] (3) Preparation of poly(cyclotriphosphazene-co-4,4'-dihydroxydiphenylsulfone) microspheres modified carbon fiber adsorbent: in N 2 Under protective conditions, add 1.6g of 4,4'-dihydroxydiphenyl sulfone (BPS) to the round bottom flask in step (2), stir and react at 40°C ...

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Abstract

The invention relates to a recyclable carbon fiber adsorbent as well as preparation and application thereof. Particularly, the invention discloses a carbon fiber adsorbent which comprises modified carbon fiber, wherein the modified carbon fiber comprises a carbon fiber base, a modified polymer membrane layer which is combined with the surface of the carbon fiber base, and microsphere-shaped modified granules which are combined with the surface of the modified polymer membrane layer. The invention further discloses a preparation method and application of the carbon fiber adsorbent. The carbon fiber adsorbent is excellent in adsorption property, can be recycled and is free of secondary pollution on water bodies, and a relatively optimal option can be provided for water body purification.

Description

technical field [0001] The invention relates to the field of materials, in particular to a recyclable carbon fiber adsorbent and its preparation and application. Background technique [0002] Heavy metal elements such as lead and chromium widely exist in rocks, soil, river water, seawater and the atmosphere in the earth's crust. As a strong pollutant, when they enter the water body during the ecological cycle, they will pose a serious threat to human health. [0003] At present, although it has been reported that activated carbon can be used as an adsorbent to pretreat water bodies, it can only remove solid impurity particles, oil stains, etc. in water bodies; The prolongation of time will cause the problem of secondary pollution to the water body. [0004] Therefore, there is an urgent need in this field to develop a novel heavy metal ion adsorbent with excellent adsorption performance, recyclable use and no secondary pollution to water bodies. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
Inventor 陈祥徐海兵祝颖丹刘东陈明达林新耀颜春涂丽艳
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI