Departamento de Engenharia Têxtil, Universidade do Minho, Campus de Azurém, Guimarães, Portugal.
J Liposome Res. 2011 Jun;21(2):151-7. doi: 10.3109/08982104.2010.492478. Epub 2010 Jun 16.
The main objective of this work was to increase the retarding effect of the acid dye Telon(®) Blue RR (C.I. Acid Blue 62; DyStar, Frankfurt, Germany) release on polyamide fibres dyeing by encapsulation of the dye in liposomes as an alternative to synthetic auxiliaries, in order to reduce effluent pollution. The retarding effect achieved with the use of mixed cationic liposomes of dioctadecyldimethylammonium bromide (DODAB)/soybean lecithin (containing a 10% molar fraction of DODAB) was better in comparison with either pure soybean lecithin liposomes or synthetic auxiliaries. The retarding effect of liposomes on the dye release was analysed through changes in the absorption and fluorescence spectra of the acid dye at different conditions. The effect of temperature (in the range of 25 °C - 70 °C) on the spectroscopic behaviour of the dye in the absence and in presence of polyamide was also studied, in order to simulate the dyeing conditions. Exhaustion curves obtained in dyeing experiments showed that, below 45 °C, the retarding effect of the mixed liposomes (lecithin/DODAB (9:1)) was similar to that of the auxiliaries, but better than the one of pure lecithin liposomes. At higher temperatures (above 45 °C), the system lecithin/DODAB presents a better performance, achieving a higher final exhaustion level when compared with the commercial leveling agent without losing the smoothing effect of lecithin.
这项工作的主要目的是通过将酸性染料泰隆（®）蓝色 RR（C.I.酸性蓝 62；DyStar，法兰克福，德国）包封在脂质体中来提高其在聚酰胺纤维染色上的缓染效果，以此替代合成助剂，从而减少废水污染。与使用纯大豆卵磷脂脂质体或合成助剂相比，使用二油酰基二甲基氯化铵（DODAB）/大豆卵磷脂（含有 10%摩尔分数的 DODAB）的混合阳离子脂质体可获得更好的缓染效果。通过在不同条件下分析酸性染料吸收和荧光光谱的变化来研究脂质体对染料释放的缓染效果。还研究了温度（25°C-70°C 范围内）对染料在不存在和存在聚酰胺时的光谱行为的影响，以模拟染色条件。染色实验得到的竭染曲线表明，在 45°C 以下，混合脂质体（卵磷脂/DODAB（9:1））的缓染效果与助剂相似，但优于纯卵磷脂脂质体。在较高温度（45°C 以上）下，卵磷脂/DODAB 体系表现出更好的性能，与商业匀染剂相比，在不失去卵磷脂平滑效果的情况下，达到更高的最终竭染水平。
