The cationic auxiliary for leather dyeing and fat-liquoring were prepared, which can not only promote the absorption to reduce the pollution, but also to eliminate "light color effect" and guarantee the quality of leather.
The combination of this product with acrylic resin is good, and it can also help to absorb and fix anionic materials, and can primarily overcome the effect of light shade caused by acrylic resin.
The absorption spectra of the DBBIs in the presence of different DNA concentrations showed a hypochromic effect and a small shift of the absorption band to longer wavelengths, which indicated the formation of a complex with DNA.
Upon the introduction of the salt in concentrations below 0.15 M, the spectrum undergoes a hypochromic effect, without modification of its general shape.
In addition to the hypochromic effect, a new broad RLS band emerges at ～420-460 nm, which arises from large H-aggregates of the dye.
The ultraviolet absorption spectra indicated that the addition of Hg2+, Ce3+, and the mixture of Ce3+ and Hg2+ to DNA generated an obviously hypochromic effect.
The size of the hypochromic effect and the peak shift of DNA by metal ion treatments was Hg2+>amp;gt;Hg2++Ce3+>amp;gt;Ce3+.
The influences of temperature, pH, anionic retanning agents and Cr(Ⅲ) salt on leather dyeing had been studied, especailly their influences on shade strength of dyestuffs on leather surface. Based on the data obtained, the mechanism of "Light shade effect"of leather dyeing was suggested. "Leather - TLC" technique was used in the experiments which shows greatpotency in leather chemicals analysis and process control.
Two groups domestic trichromatic disperse dye recommended by document are selected to dye fabrics under two pH values (pH 4.5, pH 9.0). The changes of λ max , H 0 and K/S value of dyed fabrics are compared. It is shown from the study anthraquinone disperse red 60 and disperse blue 56 are good at alkali resisting under weak basicity, light color effect caused by superfine fiber is not distinct, they can be recommended to dye superfine fabric under weak basicity. Formula C 1/C 2=(tt 2/tt 1) 1/2 ...
Two groups domestic trichromatic disperse dye recommended by document are selected to dye fabrics under two pH values (pH 4.5, pH 9.0). The changes of λ max , H 0 and K/S value of dyed fabrics are compared. It is shown from the study anthraquinone disperse red 60 and disperse blue 56 are good at alkali resisting under weak basicity, light color effect caused by superfine fiber is not distinct, they can be recommended to dye superfine fabric under weak basicity. Formula C 1/C 2=(tt 2/tt 1) 1/2 used to show the relation between fiber fineness and dye concentration on fiber is not tenable under any conditions, that is to say, light shade degree caused by superfine fabric is different under different conditions, so dye selection is important for dyeing superfine fiber fabrics.
浅色效应
light shade effect
查询“浅色效应”译词为用户自定义的双语例句
相关查询
2008 CNKI－中国知网