阴离子交换纤维的制备及吸附Cr(Ⅵ)性能研究  

Study on preparation of anion-exchange fiber and its characteristic adsorption for chromium (Ⅵ)

作　　者：邓琼[1] 曾庆轩[1] 冯长根[1] 李明愉[1] 周绍箕[1] 

机构地区：[1]北京理工大学机电工程学院爆炸灾害预防与控制国家重点实验室,北京100081

出　　处：《合成纤维工业》2005年第1期1-4,共4页China Synthetic Fiber Industry

基　　金：国家863高科技研究发展计划资助课题(2002AA245091)。

摘　　要：采用共辐射引发接枝共聚法在聚丙烯纤维上接枝苯乙烯-二乙烯苯，通过氯甲基化反应和胺化反应制备强碱性阴离子交换纤维。当单体体积分数为20％-25％，辐射剂量率为1．2-1．8kGy／h时，接枝率可以控制在150％-250％。当氯甲基化反应温度(38±2)℃，反应时间15-25h，胺化反应温度(30±2)℃，反应时间15-20h时，制备的强碱性阴离子交换纤维交换容量达到3．00mmol／g以上。将该纤维对Cr(VI)进行吸附试验，结果纤维对Cr(VI)的吸附以液膜扩散为主，吸附速度很快，8min可达到吸附饱和，吸附反应速率常数为0．015s^-1，静态吸附饱和容量为257．6mg/g，吸附行为符合Freundlish等温吸附模型。An alkali anion-exchange fiber was synthesized by grafting copolymerization of styrene and divinylbenzene onto polypropylene fiber induced by 60Co γ co-irradiation and cholormethylation and animation reactions. The grafting yield was in the range of 150% -250% when the volume fraction of the monomers was 20% -25% and the co-irradiation dose was 1.2-1.8 kGy/h. The ion-exchange capacity of the produced fiber was above 3. 00 mmol/g when the chloromethylation temperature was (38 ±2)℃ and time 15-25 h, animation temperature (30±2)℃ and time 15 -20 h. The results showed that the characteristic adsorption of this fiber for Cr(Ⅵ) with the feature of liquid-film diffusion had a rate so high that the adsorption saturation can be achieved in 8 min. The exchange rate constant was 0.015 s-1 and the static adsorption saturation capacity was 257.6 mg/g. The characteristic adsorption was coincident with Freundlish's equation.

关 键 词：阴离子交换纤维 胺化反应 制备 反应时间 强碱性 辐射引发 性能研究 氯甲基化反应 速率常数 吸附 

分 类 号：O647.3[理学—物理化学]