β-环糊精与辛基酚聚氧乙烯醚混合体系的结晶行为  

Crystallization Behavior of the Mixed Systems of β-Cyclodextrin and Polyoxyethylene Octyl Phenyl Ethers

作　　者：陈清瑞[1] 杨猛[1] 刘丽[2] 姜国庆[1] 张丹 刘凤岐[1] 

机构地区：[1]吉林大学化学学院,长春130012 [2]长春工业大学化学工程学院,长春130012 [3]抚顺市高新技术产业开发区管理委员会,抚顺113004

出　　处：《高等学校化学学报》2010年第9期1890-1895,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20274014)资助

摘　　要：研究了水中β-环糊精(β-CD)与非离子表面活性剂辛基酚聚氧乙烯醚(OP-n,n为乙氧基单元数目)混合分散体系的结晶行为.分别采用透明度法、硫氰酸钴铵显色法得到混合体系中β-CD与OP-n的包结计量比为2∶1.用UV-Vis光谱和重量分析法定量表征了OP-n和β-CD在混合体系中液相与固相的分配情况.结果表明,OP-n的亲水链段对相分离起阻碍作用,亲水性越强,阻碍作用越强;而β-CD则对相分离起促进作用.偏光显微镜测试的结果表明,混合体系的结晶形貌为粉末状和树枝状.用XRD表征了包结复合物的结晶结构,证明β-CD与OP-n在晶体中通过氢键作用组装为隧道型结构.The crystallization behavior of the nonionic surfactants polyoxyethylene octyl phenyl ethers（ OP-n, n is number of oxyethylene units） and β-cyclodextrin（ β-CD） in aqueous solutions were investigated. The inclusion complex of 2∶ 1 stoichiometry between β-CD and OP-n was determined via the optical transparency method as well as the color method. The quantitative distribution of β-CD and OP-n in the liquid phase and solid phase were determined by UV-Vis spectrum and Gravimetric analysis,respectively. The results indicated that β-CD could promote the phase separation and whereas OP-n surfactants＇hydrophilic part hinder the phase se-paration. Moreover,the stronger the hydrophilicity of OP-n surfactants,the more remarkable the effects mentioned above. The crystal morphologies of mixed systems were powders and branches,which were characterized by polarized light microscope. The crystalline structure was further characterized by X-ray diffraction（ XRD） ,and the results revealed that these inclusion complexes presented a channel-type structure by intermolecular hydrogen bonding.

关 键 词：环糊精 辛基酚聚氧乙烯醚 包结计量比 晶体结构 相分配 

分 类 号：O636[理学—高分子化学] O647[理学—化学]