A kind of manufacture method of adsorption cationic fiber membrane

Abstract

The invention discloses a manufacturing method of a fiber membrane which is large in specific surface area, has cation exchange performance, and has a function of adsorbing cations in the technical field of cationic adsorbent manufacturing. The manufacturing method comprises the following steps: firstly synthesizing a polymer which contains special functional groups and has the characteristics of electrostatic spinning, sulfonation, or insolubilization in hydrolysis and the like by adopting a suspension polymerization method by virtue of monomer screening and polymerization control processes, then spinning the synthesized polymer to obtain the fiber membrane which is combined by micro-nano fibers by virtue of staggered and undirectional arrangement and has an extremely large specific surface area by adopting an electrostatic spinning technique, and finally transforming the special functional groups into active groups capable of exchanging the cations by adopting a mild sulfonation or hydrolysis technique. Compared with an existing cationic adsorbent, the prepared fiber membrane disclosed by the invention has the advantages of large adsorption quantity, high adsorption rate, high treatment efficiency, high cation removal efficiency, low application cost, good integrality, convenience in use, easiness in recycling and the like, and can be directly used as a membrane contactor for intercepting and separating cationic pollutants in wastewater.

Description

technical field [0001] The invention relates to a manufacturing technology of a fiber membrane, in particular to a manufacturing method of a fiber membrane having a large specific surface area and cation exchange performance and having the function of adsorbing cations. The manufacturing method utilizes suspension polymerization, electrospinning and sulfonation Or hydrolysis treatment and other technologies. Background technique [0002] With the rapid development of population and industrial and agricultural production, on the one hand, it has caused a sharp increase in water consumption, and on the other hand, it has also aggravated the pollution of water bodies. According to the "2007 China Environmental Status Bulletin", the total wastewater discharge in my country in 2007 was 55.67 billion tons, of which the industrial wastewater discharge was 24.65 billion tons, and the domestic sewage discharge was 31.02 billion tons (Sui Yanming, Wu Deyi, synthetic zeolite on cationi...

AI Technical Summary

Problems solved by technology

Most of the currently existing cationic adsorbent materials are made of inorganic substances, such as activated carbon, activated alumina, natural zeolite, synthetic zeolite, natural vermiculite, sepiolite, silica gel, rare earth adsorbent, etc., which only have a large specific surface area. , does not have cation exchange performance, only relies on developed pore structure and electrostatic attraction to capture cations, the adsorption capacity is limited, the removal rate of cations is low when the adsorption is saturated, and these inorganic materials are difficult to recycle after absorbing cations due to poor integrity. Very easy to cause secondary pollution, the application is limited

In recent years, there have been cationic adsorbent materials with cationic exchange properties, such as cationic exchange resins (Prelot Benedicte, Ayed Imen, Marchandeau Franck, Zajac Jerzy, On the real performance of cation exchange resins in wastewater treatment under conditions of cation competition: the case of heavymetal pollution, Environmental science and pollution research international, 2014, 21: 9334-9343; Xie BM, Zuo JN, Gan LL, Liu FL, Wang KJ, Cation exchange resin supported nanoscale zero-valent iron for removal of phosphorus in rainwaterrunoff, Frontiers of Environmental Science&Engineering, 2014, 8: 463-470), cation exchange fibers (Li Mingyu, Zeng Qingxuan, Li Jianbo, Feng Changgen, thermodynamics of indium adsorption on strongly acidic cation exchange fibers, Chinese Journal of Nonferrous Metals, 2012, 22(10): 2846-2854; Li Mingyu, Li Jianbo, Zeng Qingxuan, Feng Changgen, Adsorption and desorption properties of cation exchange fibers for indium, 2011, 42(12): 2166-2170), but the specific surface area is small, the adsorption rate is slow, and the cation removal rate per unit time is low , especially ion exchange resin, its integrity is also poor, it is difficult to recycle after absorbing cations, and it is easy to cause secondary pollution, and its application is also limited

The adsorbent with both large specific surface area and cation exchange performance has the advantages of large adsorption capacity, fast adsorption rate, high treatment efficiency, high cation removal rate, and low application cost. It is the cation adsorbent with the best comprehensive performance. The field has its unique advantages, but due to the difficulty of preparation, there are very few adsorbent materials with large specific surface area and cation exchange performance at present. Therefore, the research and development of such materials has more important practical significance