摘要
本研究利用聚乙二醇与单宁酸形成聚电解质复合物,进一步与1,6-己二胺反应,形成以聚乙二醇为核、聚(单宁酸-己二胺)为壳的聚乙二醇@(单宁酸-己二胺)微胶囊(PEG@PTHA),并用于水溶液中阴离子染料刚果红(CR)的吸附研究。用透射电子显微镜(TEM)、傅里叶红外光谱仪(FTIR)、X射线光电子能谱(XPS)对材料的结构、成分进行了表征,并探讨了反应时间、初始染料浓度对吸附剂去除CR的吸附效果的影响。实验结果表明,PEG@PTHA对CR有较强的吸附性能,在303 K水浴温度下,吸附反应在12 h内达到吸附平衡,吸附量随初始浓度的增加而增加。在实验条件下染料浓度为240 mg/L时最大吸附量为314.7 mg/g。结果显示,吸附剂对CR的吸附行为符合准二级动力学方程,吸附等温线可用Langmuir等温吸附模型较好地描述。
In this study,the PEG@PTHA microcapsules,which were prepared by polyethylene glycol(PEG),tannic acid(TA)and hexamethylenediamine(HA),were used for the adsorption of one of anionic dyes-Congo red(CR).The structure and composition of the PEG@PTHA were characterized by transmission electron microscopy(TEM),Fourier transform infrared spectrum(FTIR)and X-ray photoelectron spectroscopy(XPS).The effect factors,including contact time and initial concentration of the dye,on the adsorption properties were investigated.The results reveal that the adsorption process reaches its equilibrium within 12h at 303 K maintained by a water bath.The adsorption capacity of the PEG@PTHA increases with the initial concentration of the dye.When the dye concentration is 240 mg/L,the adsorption capacity of the microcapsule reaches its maximum value 314.7mg/g.The adsorption process is well fitted with Langmuir model and pseudo-second-order equation.
作者
刘鹏
张嘉莹
胡涛
张文丽
张艳
刘钦泽
LIU Peng;ZHANG Jia-ying;HU Tao;ZHANG Wen-li;ZHANG Yan;LIU Qin-ze(Shandong Academy of Sciences),Jinan 250353,China)
出处
《齐鲁工业大学学报》
2019年第1期27-34,共8页
Journal of Qilu University of Technology
基金
国家自然科学基金(51403111)
国家级大学生创新创业训练计划项目(201710431003)
关键词
聚电解质复合物
微胶囊
吸附
刚果红
polyelectrolyte complex
microcapsules
adsorption
Congo red
