Study On The Subsititute Of Inorganic Salt Used In Active Dyeing On Cotton

Reactive dyes and fiber can form covalent bond each other when dying,leading fasten color,and the color is complete,the cost is low. But there are also prominent problems when dyeing.Sodium sulfate or sodium chloride can cause such environment pollution as water and soil salinization. Therefore, in recent years, low salt and salt-free reactive dyeing become one of the hot topic of research..The improvement methods are mainly from the dye structure, fiber modifyintg, promoted reagent and dyeing process, but all of them have its own advantages and disadvantages.Moreover, there is no mature industrialized promote reagent. As the alternatives of inorganic salts,organic acid salt, ampholytic surface active agent and tombarthite are just used without more theory.Under the reference in hand,the paper tred to find the principle of organic acid salt and ampholytic surface active agent used in dyeing cotton.Citric acid sodium and sodium sulfate woking with sodium chloride, potassium chloride, magnesium chloride, aluminium chloride, Lanthanum chloride and chlorinated cerium respectively,all of which can reduce the abs of dye liquor and Zeta potention of cotton against dye.And lower abs more excellent dyeing effection,lower Zeta potention more promoted dyeing.Besides, potassium chloride is outstangding.Ampholytic surface active agent is as the second reserch target. under different proportion,six kinds of them were used with sodium sulfate together respectively. The research result was that all of them can promote dyeing with certain dosage,which may have the relationship with cmc,a unique properties of Ampholytic surface active agent. Besides these,the six combined promoting agent also effect the abs and Zeta potention as well as the series of citric acid sodium. Laurel acyl amino acid sodium (simpally named FS701) was better.At last, under the traditional process, joining three substance together,an excellent promoting agent was fond.The content of sodium sulfate, potassium chloride and FS701 is 10g/L, 17.5g/L and 1g/L that their whole weight is reduced by 43% while effect is comparable with sodium sulfate, the traditional accelerating system.