酰胺化改性聚砜亲和膜的制备及其对对硝基苯酚的吸附性能

Preparation of phthalimidomethyl polysulfone affinity membrane and its removal properties of p-nitrophenol

以邻苯二甲酰亚胺钠盐为亲核取代试剂,通过Gabriel反应,成功地将氯甲基化聚砜(CMPSF)转化为酰胺化聚砜(PIPSF);考察了溶剂的极性、反应温度及反应时间等因素对反应规律的影响,并用FT-IR表征了PIPSF的结构.利用相转化法制备PIPSF/PSF共混亲和膜,研究不同共混质量比下膜的结构性能,并用扫描电镜分析膜的断面结构;采用该亲和膜对对硝基苯酚进行吸附行为研究.结果表明:亲和膜对对硝基苯酚的吸附随溶液中对硝基苯酚浓度的增加而增加,最大吸附量为11.23 mg/g,吸附行为满足Freundlich吸附等温式.

Chloromethylated polysulfone was transformed into phthalimidomethylated polysulfone via the Gabriel reaction using sodium salt of phthalic imidine as the reagent of nucleophilic substitution. The factors affecting the reaction, such as the reation solvent, reation temperature and reation time were investigated. Its structure also was confirmed by H＇-IR. The affinity membrane was prepared through phase conversion method. The effects of different blending ratios on the performances of membranes were studied and the cross sectional views of menbrane micrograpb were analysed by SEM. The obtained affinity membranes were used to adsorb the p -nitrophenol, and the results indicated that the adsorption capacity increased with increasing the mass concentration of p-nitlvphenol in aqueous solution. The big p -nitrophenol adsorption capacity was 11.23 mg/g. The adsorption isotherm fitted the Freundlich model well.