A preparation method of monolithic polyacrylonitrile carbon fiber electrode for desalination

A polyacrylonitrile and polyacrylonitrile membrane technology, which is applied in separation methods, electrochemical water/sewage treatment, dispersed particle separation, etc., can solve the problems of large-scale preparation of carbon materials that are difficult to achieve, and the process is tedious, and achieves thin fiber diameters. , the effect of high desalination capacity and strong desalination capacity

Inactive Publication Date: 2011-12-21
DALIAN UNIV OF TECH
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Problems solved by technology

However, the preparation of mesoporous carbon by the template method requires the preparation of silicon or polymer templates first. The process is lengthy and it is difficult to apply to the large-scale preparation of carbon materials.

Method used

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  • A preparation method of monolithic polyacrylonitrile carbon fiber electrode for desalination
  • A preparation method of monolithic polyacrylonitrile carbon fiber electrode for desalination
  • A preparation method of monolithic polyacrylonitrile carbon fiber electrode for desalination

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Embodiment Construction

[0025] Below by example the present invention will be further described

[0026] This example prepares polyacrylonitrile fiber film ( figure 1 ), and then investigate the properties of carbon fibers at different activation temperatures (750, 800, and 900 °C). The specific properties are shown in Table 1. It can be seen from Table 1 that the specific surface area increases with the increase of activation temperature; when the activation temperature is 900 °C, the specific surface area is 712m 2 / g. In addition, the average pore size of carbon fiber is more than 2nm, so it contains abundant mesopores, which is beneficial to the adsorption of salt, because mesopores are more conducive to the electrosorption of hydrated sodium ions and hydrated chloride ions.

[0027] Table 1 Pore performance characteristics of monolithic activated PAN-based carbon fiber

[0028]

[0029] figure 2 When the activation temperature is 900 ° C, PAN-based activated carbon fibers. From figure...

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Abstract

The invention relates to a preparation method for an integral polyacrylonitrile carbon fiber electrode for desalination, belonging to the technical field of novel carbon material preparation and water treatment. The method is based on an electrostatic spinning technique. Polyacrylonitrile is electro-spun into a film and then preoxidation, carbonization and activation are conducted. The prepared carbon fiber material has the characteristics of good macro integrity, small fiber diameter, large mass specific capacitance, high desalination capacity and the like. When electro-adsorption treatment is conducted to NaCl solution with initial concentration being 70mg/l under 1.6V direct-current voltage, the adsorption capacity of the carbon fiber electrode reaches 4.64mgNaCl/g and therefore a strong desalination capacity is reflected. The novel carbon fiber electrode can be widely used in fields such as bitter saline water and seawater desalination, water softening, heavy metal ion removal andthe like.

Description

technical field [0001] The invention relates to a preparation method of an integral polyacrylonitrile carbon fiber electrode for desalination, and belongs to the technical field of preparation of new carbon materials and water treatment thereof. Background technique [0002] Capacitive Deionization Technology (CDT) is a brand-new electro-adsorption desalination method based on the principle of electric double layer capacitors for charge desalination and discharge regeneration. Since only direct current (0.5-2V) is needed in the desalination process, the electrodes can be regenerated by short-circuiting or reversely connecting them, and there is no need to use a large amount of acid and alkali to clean the electrodes, so no secondary pollutants will be produced , has the characteristics of energy saving, environmental protection, high efficiency and simple operation. [0003] In capacitive deionization and desalination technology, electrode materials are mainly carbon materi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46C02F1/469
Inventor 邱介山王刚潘超钱冰清
Owner DALIAN UNIV OF TECH
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