摘要
采用无皂乳液聚合法制备丙烯酸乙酯(EA)与丙烯酰胺(AM)接枝淀粉/β-环糊精(β-CD)树脂,通过傅里叶变换红外光谱、扫描电子显微镜分析了树脂的结构,用原子吸收光谱法研究了树脂的吸附性能。结果表明:当淀粉用量为2.00 g,淀粉,β-CD,EA,AM质量比为2.0∶1.0∶1.0∶0.5,引发剂用量为0.03 g,交联剂用量为0.03g,聚乙烯醇用量为0.04 g,十二烷基硫酸钠为0.02 g,在50℃时反应5 h,得到的树脂接枝率最大。树脂对金属离子吸附量与金属离子结构、外层电子排布有关,吸附Cu2+,Mn2+的最佳时间分别为120,150 min;随着金属离子质量浓度及溶液pH值的增大,吸附量亦增大,且树脂对Cu2+吸附量大于Mn2+。树脂对色素胭脂红的吸附量随胭脂红质量浓度的增大而增大。当Cu2+,Mn2+和胭脂红初始质量浓度分别为50.0,50.0,40.0 mg/L时,吸附量分别为15.531 0,10.285 0,12.138 0 mg/g。
Starch/β-cyclodextrin resin grafted by ethyl acrylate （EA） and acrylamide （AM） was synthe- sized by no soap emulsion polymerization. The structure of the resin was analyzed by Fourier transform infrared spectroscopy （FTIR） and scanning electron microscopy （SEM）, and the adsorption properties of the resin were tested by atomic absorption spectrometry （AAS）. The results show that the resin with the maximum grafting ratio is obtained when the mass of starch is 2.00 g, the mass ratio of starch, β-cyclodextrin, EA and AM is 2.0 ： 1.0 ： 1.0 ： 0.5, the mass of the initiator, crosslinking agent, polyvinyl alcohol and sodium dodecyl sulfate are 0.03, 0.03, 0.04, 0.02 g, respectively, and the reaction is carried out at 50 ~C for five hours. The adsorbance of metal ions by the resin is associated with the structure and outer electron configuration of the metal ions. The optimal adsorption time of Cu2＋ and Mn2＋ are 120, 150 minutes, respectively. The adsorbance increases with the rise in the concentration of metal ions and pH value, and the adsorbance of Cu2＋ is more than that of Mn〉. The adsorbance of carmine by the resin increases with the augmentation of the concentration of carmine. The adsorbance of Cu2＋, Mn2＋ and carmine by the resin are 15.531 0, 10.285 0, 12.138 0 mg/g when the initial concentration of Cu2＋, Mn2＋ and carmine are 50.0, 50.0, 40.0 mg/L, respectively.
出处
《合成树脂及塑料》
CAS
北大核心
2013年第5期24-27,59,共5页
China Synthetic Resin and Plastics
基金
陕西省自然科学基金(11JK0586)
咸阳师范学院科研专项(10XSYK110)
关键词
淀粉
Β-环糊精
无皂乳液聚合
金属离子吸附
starch
β-cyclodextrin
no soap emulsion polymerization
metal ion
adsorption
