Studies on Assessment of Reactive Dyeings from Viewpoint of Eco-Textiles

(1)：在好氧条件下，研究了四种三吩二恶嗪（TPDO）活性染料和一种酞菁铜（CuPc）活性染料在纤维素膜上的光敏氧化作用。TPDO染料和CuPc染料对纤维素的褪色无聚集作用，但有浓度和过滤作用。(2)：采用纤维素膜，在60℃条件下，考察了7种活性染料在含TAED的过氧硼酸钠（PB）溶液（UK-TO溶液）中对纤维素的稳定性。玻璃纸染色膜的染料损失有三个原因：(a)染料纤维键的碱性水解，(b)染料发色团被过氧化物氧化褪色，(c) PB和TAED加速纤维素降解。染料-纤维键的碱性水解和纤维素在UK-TO溶液中的降解是造成染料损失的主要因素。染料在UK-TO溶液中的氧化是影响染料损失机理的次要因素。在UK-TO溶液中，更多的染料分子的物理键增强了染料纤维键的稳定性。(3)考察了9种还原染料在纤维素薄膜上的光稳定性。通过还原染料在玻璃纸上的相对褪色（仅光氧化褪色）来估计染料的光氧化易度（k_0）。与活性染料相比，k_0值较小，而与活性染料相比，k_0值较小。9种还原染料在干棉织物上的耐光性与log （fk_0）密切相关。(5)：用PM5和COSMO方法分别在气相和水中估算了苯二唑萘磺酸的偶氮和腙互变异构体的生成焓。(6)：对于橙色I和II，分析了未解离和解离种的偶氮腙互变异构性，用PM5法估计了它们在气相和水中的生成焓。(7)：研究了15种活性偶氮染料在湿条件下对玻璃纸的光褪色性能。对数乘积log （f k_0）与干棉织物上染料的LF等级之间存在线性相关性，当添加低LF的活性染料和前一篇论文中检测的还原染料的图时，因为所检测的15种染料中有11种红色染料的等级范围很窄。少

(1):Photosensitized oxidation of four triphenodioxazine (TPDO) reactive dyes and a copper phthalocyanine (CuPc) reactive dye on cellulosic films by Rose Bengal (RB) was examined in the aqueous solutions under aerobic conditions. No aggregation effect was observed on the fading of TPDO dyes and a CuPc dye on cellulose, but the concentration or filter effect.(2):The stability of seven reactive dyes on cellulose immersed in sodium peroxoborate (PB) solution (UK-TO solution) containing TAED was examined by use of cellulosic films at 60℃. The dye loss from dyed cellophane films was attributed to three contributions : (a)alkaline hydrolysis of dye-fiber bond, (b)oxidative fading of dye chromophore by peroxides, and (c)cellulose degradation accelerated by PB and TAED. The alkaline hydrolysis of dye-fiber bond and the cellulose degradation in UK-TO solution were the dominant factors to cause the dye loss. The dye oxidation in UK-TO solution was a minor factor in the dye loss mechanism. The phy … More sical bonding of dye molecules reinforced the dye-fibre bond stability in UK-TO solution.(3):Photostability of nine vat dyes on cellulosic films was examined. The ease (k_0) with which the dyes were photo-oxidized was estimated by the relative fading of vat dyes on cellophane immersed in aqueous Rose Bengal solution on exposure, a condition resulting in only the photo-oxidative fading. The values of k_0 were small, compared with those of reactive dyes, while those of f comparable. The lightfastness of nine vat dyes on dry cotton fabric had close correlation with log (f k_0).(5):The enthalpy of formation for the azo and hydrazone tautomers of phenylazonaphthol sulfonic acids was estimated both in the gaseous phase and in water using the PM5 and COSMO method.(6):With respect to Orange I and II, azo-hydrazone tautomerism of the undissociated and dissociated species was analysed estimating their enthalpies of formation in both the gaseous phase and water using the PM5 method.(7):Photofading of fifteen reactive azo dyes on cellophane under wet conditions was examined to estimate the essential properties. A linear correlation between the logarithmic product, log (f k_0), and the LF ratings of dyes on dry cotton fabric was found when plots of reactive dyes with low LF and those of the vat dyes examined in a previous paper were added because the ratings of eleven red dyes out of fifteen dyes examined had a narrow range. Less