蒽醌类分散染料与表面活性剂及无机盐的相互作用

Interaction between anthraquinone disperse dyes/surfactant and inorganic salt in aqueous solution

通过测定蒽醌类染料分散蓝2BLN在不同浓度的阴、非离子表面活性剂及无机盐存在下的水溶液的紫外-可见吸收光谱,研究了分散蓝2BLN与表面活性剂及无机盐的相互作用.实验表明:染料的最大吸收波长会随着十二烷基硫酸钠、十二烷基磺酸钠、AES、Tween80浓度的升高发生明显的红移,增加20 nm左右;且吸光度值会明显增大,直到恒定.当浓度超过某一范围时会在627 nm附近出现新的吸收峰,表明染料与表面活性剂发生了结合;而加入十二烷基苯磺酸钠的染料吸收光谱仅发生红移,没有出现新吸收峰;单独加入无机盐对染料吸收光谱几乎没有影响;但无机盐的加入会对表面活性剂胶束产生影响.

Interaction between disperse blue 2BLN as a disperse dye and different surfactants, inorganic salts were studied in aqueous solution by using UV-Visible adsorption spectra. The results show that with surfactants concentration increasing the maximum adsorption wavelength of dye increases around 20 urn, and absorbance increasing until to a constant in the presence of sodium dodecyl sulfate, sodium dodecyl sulfonate, AES, Tween80, respectively. A new adsorption peak appears around 627 nm showing that union between dye and surfactant happens when the concentration reaches a range. And adding sodium dodecyl benzene sulfonate only makes redshift occur, new adsorption peak doesn＇t appear. Adding inorganic salts alone has no effect, however, the addition of inorganic salts will influence surfactants micelle in the presence of surfactants.