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Selective Adsorption of Dyes and Surfactants with Cyclodextrin Containing Polymers

含环糊精聚合物选择性吸附染料和表面活性剂

基本信息

批准号：
10680123
负责人：
IHARA Yasuji
金额：
$ 1.92万
依托单位：
Yamaguchi Prefectural University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

项目摘要

(1)The adsorption isotherms of acid dyes onto polymers containing cyclodextrin (CD) were measured in aqueous solution. The adsorption affinities of dyes with water-soluble polymer increased with increases in the length of alkly chain units. The adsorption affinities of dyes with water-insoluble polymer increased with increases in the ratio of hydrophobic components. The relationship between adsorption affinities and OSQR properties were also discussed in order to determine preferred adsorption behaviors of different CD polymers and acid dyes.(2)The adsorption isotherms of nonionic surfactants onto polymer adsorbent containing CDs were measured in aqueous solution. The adsorption affinities for nonionic surfactants decrease with increases in the length of oxyethylene units in the adsorbates. The adsorption affinities for sodium dodecylbenzene sulfonate (NaDBS) in nonionic surfactants decreased with increases in the ratio of nonionic surfactant to NaDBS.(3)The inclusion complex formation of methyl orange and its homologs with CDs in aqueous solution was investigated by spectrophotometric measurements at different temperatures. It was found that α-and β-CDs formed 1 : 1 complexes, but γ-CD formed a 1 : 2 complex with dye molecules. The increases of the alkyl chain length in the dye molecules increased the binding constant. The entropy and enthalpy changes were calculated for the complex formation and contribution of entropy to the process was discussed.(4)The inclusion complex formation of alkyl slufonate and its related compounds with CDs and double CDs in aqueous solution was investigated by fluorescence spectrum measurements at different temperatures. The increases of the alkyl chain length in the double CDs decreased the binding constant. The fitness of the alkyl sulfonate to the cavity of CD was suggested to affect the binding constant.

(1)测定了酸性染料在含环糊精（CD）聚合物上的吸附等温线。染料对水溶性聚合物的吸附亲和度随着碱链单元长度的增加而增加。染料对水不溶性聚合物的吸附亲和度随着疏水组分比例的增加而增加。为了确定不同CD聚合物和酸性染料的首选吸附行为，还讨论了吸附亲和度与OSQR性能之间的关系。(2)测定了非离子型表面活性剂在含CDs聚合物吸附剂上的吸附等温线。对非离子型表面活性剂的吸附亲和度随着吸附剂中氧乙烯单元长度的增加而降低。非离子表面活性剂对十二烷基苯磺酸钠（NaDBS）的吸附亲和度随着非离子表面活性剂与NaDBS配比的增加而降低。(3)用分光光度法研究了甲基橙及其同物与CDs在水溶液中在不同温度下形成包合物的过程。α- cd与β- cd形成1:1配合物，而γ-CD与染料分子形成1:1配合物。染料分子中烷基链长度的增加增加了结合常数。计算了合成过程的熵变和焓变，并讨论了熵对合成过程的贡献。(4)通过不同温度下的荧光光谱测量，研究了烷基磺酸盐及其相关化合物与CDs和双CDs在水溶液中的包合形成。随着双CDs中烷基链长度的增加，其结合常数减小。烷基磺酸盐与CD的腔体的适合度影响了其结合常数。