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High oil-absorbing polyacrylonitrile hollow activated carbon fiber and preparation method thereof

A technology of activated carbon fiber and polyacrylonitrile, which is applied in the manufacture of hollow filaments, chemical instruments and methods, and other chemical processes. It can solve the problems of high production process cost, low reuse rate, and complex production equipment, and achieve oil absorption. Thorough recovery, high oil absorption ratio, material saving effect

Inactive Publication Date: 2016-05-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material prepared by this method has large pores, relatively fragile structure, easy to collapse, and low reuse rate
Chinese patent CN200610051830.2 uses vinyl monomers and acrylic monomers as the matrix, and prepares reusable super oil-absorbing resins by adding physical cross-linking agents, chemical cross-linking agents and emulsifiers, and polymerizing under the protection of inert gas. The patented production process is expensive and needs to be carried out under the protection of nitrogen, so it may cause complex production equipment

Method used

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  • High oil-absorbing polyacrylonitrile hollow activated carbon fiber and preparation method thereof
  • High oil-absorbing polyacrylonitrile hollow activated carbon fiber and preparation method thereof
  • High oil-absorbing polyacrylonitrile hollow activated carbon fiber and preparation method thereof

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Effect test

Embodiment 1

[0031] (1) Preparation of polyacrylonitrile hollow fiber: Dissolve 250 grams of polyacrylonitrile in 750 grams of DMF (N,N-dimethylformamide), stir at 60-80°C to form 25% (mass ratio) The polyacrylonitrile / DMF solution was vacuum-degassed for 6 hours, then allowed to stand for 24 hours, and then dry-wet spinning was carried out at 60°C through an inserted spinneret. The core liquid is pure water, the distance between the spinneret and the coagulation liquid is 20cm, the coagulation liquid is a mixture of solvent and water (DMF: water = 1:1, mass ratio), and the stretching speed is 100 m / min. The nascent polyacrylonitrile hollow fiber was obtained by the above dry-wet method, and then washed with pure water to remove the solvent, and then, after being washed with ethanol, dried at 80°C to form a polyacrylonitrile hollow fiber. The inner diameter of the prepared hollow fiber was 0.3mm, 0.5mm outer diameter.

[0032] (2) The polyacrylonitrile hollow fiber is woven into a net wit...

Embodiment 2

[0044] (1) Preparation of polyacrylonitrile hollow fiber: Dissolve 250 grams of polyacrylonitrile in 750 grams of DMF (N,N-dimethylformamide), stir at 60-80°C to form 25% (mass ratio) The polyacrylonitrile / DMF solution was vacuum-degassed for 6 hours, then allowed to stand for 24 hours, and then dry-wet spinning was carried out at 60°C through an inserted spinneret. The core liquid is pure water, the distance between the spinneret and the coagulation liquid is 20 cm, the coagulation liquid is a mixture of solvent and water (DMF: water = 1:1, mass ratio), and the stretching speed is 120 m / min. The nascent polyacrylonitrile hollow fiber was obtained by the above dry-wet method, and then washed with pure water to remove the solvent, and then, after being washed with ethanol, dried at 80°C to form a polyacrylonitrile hollow fiber. The inner diameter of the prepared hollow fiber was 0.2mm. 0.4mm outer diameter.

[0045] (2) The polyacrylonitrile hollow fiber is woven into a net wi...

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Abstract

The invention belongs to the technical field of functional materials, and discloses a high oil-absorbing polyacrylonitrile hollow activated carbon fiber and a preparation method thereof. The method is as below: dissolving polyacrylonitrile in DMF to obtain a polyacrylonitrile / DMF solution; degassing the solution and conducting a dry-wet spinning to obtain polyacrylonitrile hollow fibers; soaking the fibers in deionized water for pretreatment, heating the polyacrylonitrile hollow fibers after pretreatment to 230-250 DEG C, pre-oxidizing for 1-3 h, then heating to 550-600 DEG C under a nitrogen atmosphere, and carbonizing for 1-1.5 h; and finally heating to 800-1100 DEG C in a carbon dioxide atmosphere and activating for 1-4 h to obtain the high oil-absorbing polyacrylonitrile hollow activated carbon fiber. The obtained polyacrylonitrile hollow activated carbon fiber has high oil absorption rate, is easy to recycle and reuse, can be widely used in oil spill treatment, waste oil recovery and floating oil treatment.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a high oil-absorbing polyacrylonitrile hollow activated carbon fiber and a preparation method thereof. Background technique [0002] Due to the further increase in oil exploitation and consumption, the problems of crude oil leakage and waste oil treatment are becoming more and more serious. These oil spills form oil films covering the water surface, which not only wastes precious oil resources, but also causes serious harm to aquatic organisms. If it is not dealt with in time, it will bring great harm to the ecological environment and human health. The shortcomings of traditional oil-absorbing materials such as single type of oil absorption, small oil absorption, low oil-water selectivity, poor oil retention after oil absorption, and inconvenient recovery limit their application. New functional polymer materials for waste water, due to their high oil abs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F1/08B01J20/20
CPCB01J20/20D01F1/08D01F9/22B01J2220/42B01J2220/4812
Inventor 肖凯军王文霞银玉容
Owner SOUTH CHINA UNIV OF TECH
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