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Studies on Graft-polymerization of Sodium p-styrenesulfonate
on Polysulfone Membrane and Adsorption Character of Grafted Membrane for Pesticides Containing Nitrogen
Authors： Liu Hai, Gao Baojiao, Sun Shixiong
Units： Department of Chemical Engineering, North University of China, Taiyuan 030051
KeyWords： Polysulfone; Grafted membrane; Sodium p-styrenesulfonate; Surface-initiating; Graft-polymerization; Pesticide residue;
ClassificationCode：TQ028.8
year,volume(issue):pagination： 2015, 35(1):123-130

Abstract：

Chloromethylated polysulfone (CMPSF) was first prepared by using chloromethylation reagent, and then the CMPSF membrane was casted. Subsequently, CMPSF membrane was aminated with ethanediamine (EDA) as reagent, and amino groups were introduced onto the surface of PSF membrane, obtained the amination membrane AMPSF. On this basis, a surface-initiating system was constituted by the amino group -NH2 on the surface of AMPSF membrane and peroxysulphate in the aqueous solution, and it initiated sodium p-styrenesulfonate (SSS) to be graft-polymerized, obtaining the grafted membrane PSF-g-PSSS. The effects of main factors on the graft-polymerization were investigated in depth, and the reaction conditions were optimized. The grafted membrane PSF-g-PSSS was characterized by infrared spectroscopy (FTIR) and optical microscope (OM) as well as weight method. Finally, the adsorption characters of the grafted membrane PSF-g-PSSS for two nitrogen-containing heterocyclic ring pesticides, pirimicarb and atrazine, were examined. The experimental results show that by using surface-initiating system of amino group/peroxysulphate, the graft-polymerization of SSS on the surface of PSF membrane can be successfully realized, and the grafting degree of PSSS increases with the content of amino group on the basement membrane AMPSF. The suitable temperature for the graft-polymerization of SSS is 70 ℃, and the appropriate concentration of the initiator peroxysulphate in the solution is 0.3% of the monomer mass. Under the optimum conditions, the grafted membrane PSF-g-PSSS with a PSSS grafting degree of 1.23 mg/cm2 can be gained. By right of strong electrostatic interaction between host and guest, the grafted membrane can produce strong adsorption action for pirimicarb and atrazine molecules.

Funds：
山西省青年科学基金资助项目(2013021012-3)

AuthorIntro：
刘海（1988-），男，陕西咸阳人，硕士生，研究方向为功能复合膜的制备及性能研究. *通讯作者 , E-mail:gaobaojiao@126.com

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