【摘要】 超临界CO2染色技术是一种新型的无水染色技术,染料在超临界CO2中的溶解度是超临界CO2染色工艺的一个重要基础数据。在压力16～28MPa、温度343.2～383.2K范围内,采用静态循环法对分散橙30和分散橙31两种分散染料在超临界CO2中的溶解度进行了测定。两者的溶解度范围分别为2.1×10-5～7.8×10-5和1.4×10-5～3.7×10-5(摩尔分率),均随着压力的升高而升高。由溶解度随温度变化趋势推测,分散橙30在16MPa附近将出现压力转折点,而分散橙31在实验范围内未出现转折压力。两种染料的溶解度数据比较表明,苯环上引入-Cl,可使溶解度明显提高。分散橙30和分散橙31的溶解度实验数据用Chrastil经验模型拟合,平均相对偏差分别为4.9%和2.46%。更多还原

【Abstract】 Dyeing in supercritical CO2 is a new waterless dyeing process, and the solubility of dyes in the supercritical CO2 is one of the most important technological parameters for process control of this process. Static recirculation method was used here to measure the solubilities of two disperse dyes (C.I. Disperse Orange 30 and C.I. Disperse Orange 31) in supercritical CO2 at temperature of 343.2 to 383.2 K and pressure of 16 to 28 MPa. The results show that their solubilities are in the ranges of 2.1×10-5~7.8×10-5 and 1.4×10-5~3.7×10-5 mol·mol-1, respectively. It was found that the solubilities increase with increasing pressure at certain temperature, and according to the tendency of the change of solubility with temperature, it can be inferred that C.I. Disperse Orange 30 will have a turning point of pressure near 16 MPa. However, there is no turning point of pressure for C.I. Disperse Orange 31 under experimental condition. The comparison between the solubilities of these two disperse dyes studied reveals that the presence of -Cl groups in the benzene ring results in higher solubility. The measured solubilities of C.I. Disperse Orange 30 and C.I. Disperse Orange 31 were fitted with the Chrastil model and the average relative deviations are 4.9% and 2.46%, respectively.更多还原