对苯乙烯磺酸钠功能化聚砜接枝膜的制备及对Pb^(2+)的吸附特性

Styrene sulfonate functional graft polysulfone membrane preparation and the adsorption characteristics of Pb^(2+)

采用相转化法制得氯甲基化聚砜(CMPSF)不对称多孔基膜,以乙二胺对基膜进行化学改性,利用—NH2/S2O82-表面引发体系,使单体对苯乙烯磺酸钠(SSS)接枝聚合,制得多孔接枝膜PSF-g-PSSS。通过静态吸附法研究接枝膜对重金属离子Pb^(2+)的吸附性能。结果表明,在温度70℃,过硫酸铵的浓度0.4%的条件下反应18 h时,聚合物PSSS的接枝度最大,为0.7 mg/cm^2。凭借强烈的静电相互作用,接枝膜PSF-g-PSSS对重金属离子Pb^(2+)表现出强的吸附能力,饱和吸附容量高达0.83 mmol/cm^2。

Chloromethylation polysulfone asymmetric porous membrane（ CMPSF） was prepared by phase inversion method,using initiator system —NH2/S2 O82-surface,the monomer of styrene sulfonate（ SSS）graft polymerization,made porous grafted membrane PSF-g-PSSS. The grafted membrane was studied by static adsorption method for adsorption performance of the Pb^2＋. The result showed that the temperature is70 ℃,the concentration of ammonium persulfate was 0. 4% of the reaction under the condition of 18 h,the grafting degree of the polymer PSSS maximum 0. 7 mg/cm^2. With the strong electrostatic interaction,grafted membrane PSF-g-PSSS of Pb^2 ＋showed strong adsorption ability,saturated adsorption capacity up to 0. 83 mmol/cm^2.