Performance Control And Application Of Foaming Agent In Foam Dyeing And Finishing Processing

The influences of SDS concentrations, stirring time and dodecanol dosages onfoamability and stability were studied referring to the Warring Blender method. The effects ofpaint, thickening, adhesive dosages on the foam properties were investigated. The resultsshowed that as SDS concentration was4g/L and stirring time was2min, the foam ratio was7.77, the half-life was138s. The foam stability reached by the addition of dedecanol. As thedodecanol concentration was only0.1g/L, the half-life reached to714s. Addition of thepigment and the binder can reduce the foaming ratio and foam stability, and the thickener canstabilize the foam with the half-life increased to1000s at the concentration of5g/L. Theeffect of SDS on the absorption and absorption intensity of the pigment was studied. Thepigment absorption curve and absorbance did not change much with the addition of SDS.Foaming agent had good compatibility with the pigment. The K/S value and levellingproperty based on thickener concentrations were measured. The result showed that as thethickener concentration was2g/L, higher K/S value and better levelling properties wereachieved.The influences of Tween-80concentrations, stirring time on foamability and stabilitywere studied. The results showed that as Tween-80concentration was4g/L and stirring timewas2min, the foam ratio was6.05, the half-life was90s. The compatibilities of the cationicmodifier with Tween80and SDS were investigated by comparing the foam properties indifferent cationic modifier concentrations. The results showed that with the increase ofmodifier dosage, foaming ratio of SDS and Tween-80decreased and foam stability increased.The foaming ratio of SDS was dropped to5when modifier concentration was over100g/L.The surface resistance, wetting time and contact angle after5s of the control and treatedfabrics were studied. The K/S values, sharpness and prints after treatment were also discussed.The results showed that the modified silk fabric obtained a promotion in hydrophilcity. It wasalso concluded that the treated fabric showed deeper inkjet printing K/S values and bettersharpness.Dodecyl tetra methyl guanidine was synthesized by tetramethyl guanidine andbromododecane, the switchability of DTMG was studied by measuring the pH values ofDTMG before and after bubbling CO₂. The results showed that DTMG solution presentedalkaline, after bubbling CO₂16min, pH value declined, it went up again by heating at80℃for19min. This cycle can be controlled by bubbling or releasing CO₂. Foam switchability ofDTMG was investigated by testing the foam properties, foam ratio of DTMG was5.60andhalf-life was60s, after bubbling CO₂, foam ratio of DTMG·HCO₃was11.23, half-life was126s, so the foam properties can be controlled by bubbling or releasing CO₂. The optimumtemperature of DTMG·HCO₃disintegration was researched by testing the K/S value changesof DTMG·HCO₃solutions at different temperatures, it proved that at80℃, CO₂can removedfrom DTMG·HCO₃quickly and the pH value went up rapidly. The foam can disappear in5min.The effects of pigment, binder and foam stabilizer on the foam properties an switchability were investigated to realize the possibility of controlling foam properties inDodecyl tetramethyl guanidine load pigment dyeing. The results showed foam properties wasless affected by pigment and binder and foam properties can be controlled by CO₂after twocycles. Foam stabilizer can stabilize the foam with the half-life increased to102min at theC₁₄EO₅concentration of60g/L. The foam can disappear in15min at80℃. With the increaseof C₁₄EO₅concentration, the K/S value difference between two sides of dyed fabric AsC₁₄EO₅concentration was60g/L, better levelling properties of dyed fabric face wereachieved.