超声波对普拉红B染料缔合状态的影响

Effect of ultrasonic wave on associating state of weak acidity Oprah Red B dye

为了降低染料在溶液中的缔合程度,通过染液的电导率和可见吸收光谱变化研究了超声波对染料缔合状态的影响。结果表明,普拉红B溶液的最大吸收波长随着浓度的增加逐渐减小,发生蓝移,其缔合浓度为1×10-5mol/L。在高于染料缔合浓度的条件下,随着温度的升高,经超声波处理后染液的电导率增加幅度大于未经超声波处理染液。在50℃下,随超声波处理时间的延长,染液的电导率逐渐增加,吸收光谱发生红移,吸收光谱中相应肩峰的峰值逐渐减小。

In order to reduce the dye′s associating degree in solution,the effect of ultrasonic wave on dye associating state was studied via determination of conductivity and visible absorption spectrum change of the dye liquor.The results showed that the maximum absorption wavelength of the dye solution exhibited decreasing gradually and a blue shift with the increase in the concentration of weak acid Oprah Red B solution and,and its association concentration was determined as 1×10-5 mol/L.As the temperature increases,the increase of the conductivity of the ultrasonically processed dye solution was higher than that of the non-ultrasonically processed dye solution when the association concentration of dye solution is higher than that of dye.At 50 ℃,the electrical conductivity of the dye solution gradually increased with the ultrasonic processing time,and a red shift of the λmax occurred,with a decrease in the absorbance of spectrum of the corresponding shoulder peak.