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Disperse red 3B in polyester microfiber on the drawing of isotherms

3B red dye different fabrics isotherms (5C) Table 2, reduction of polyester microfiber is not disheartened by absorption lines such as the value (55c) 0.7551. ~ 5023.05144.350 .... s. : Shirt ss. . . . Earthworm. . Table 3 The reduction of ultra-fine fibers such as polyester. An absorption line value (55 ℃) Table 4 ordinary polyester fiber isotherm value (55c) 3 iv 1 【2 iv 3 iv 4O0ou5O0o mouth 6 ∞ ∞ 7O0o port 80 (1 (1 ¨ hoard 3 beam reduction of polyester microfiber isothermal absorption line (55C) TDFJ1999 on Dec. No. 6 ix iv iv ix iv iv iv 0m2 iv 4r sampan) (King) 8 Ⅲ m0} 0 \(5-5C) can be seen through the three graphics above, disperse dyeing of polyester microfiber isotherms. not like a classical thermodynamic theory that is as linear Nernst. but curved. As dispersion Dyes with an OH, NH and other polar groups of a, so it has happened with polyester fiber orientation may be adsorbed, in particular polyester microfiber. its large surface area. Positioning adsorption points, lower in the dye concentration time. This absorption becomes more prominent positioning. superfine fiber reduction, the surface of the electronegativity of groups increased, Zate potential bigger. just dye it difficult to make this positioning close to the adsorption decrease. ordinary fiber surface area of small positioning less adsorption sites, adsorption is not so clear positioning. 4.3 without reduction of polyester microfiber isotherm on the separation of disperse dyed polyester microfiber is the Nernst and Langmuir models attached to the compound,[link widoczny dla zalogowanych], can be expressed as: [D] = o + D, = Kp [D: + j [D] l: dye concentration on the fiber [mol/kg-; DP: \mo / kg]; D: Langmuir adsorption type of positioning the amount of dye fabric dyes Emol / kg ~; [1j:: Deer in the amount of dye solution [tool / kg] fKp :.\Langmuir constants: [s:: Langmuir-type adsorption Langmuir adsorption when the adsorption reached saturation values, the adsorption isotherm is still a straight line. can also be seen from the graph the curve after the 4 points is indeed a straight line. The slope of this line Nernst partition coefficients for the adsorption of K on the vertical axis in C. intercept should be saturated Langmuir adsorption s]. to the least square method to be a straight line after four sets. The results are as follows: K1.395 × 10 [ ,],[link widoczny dla zalogowanych],[) This is done on the composite isotherm of the separation work. Figure 6: DIr ', mol / kg) L-type Nen ~ t-type valves clear Iir grapefruit type fDI, (tool / 1) disperse the store 6 dyed polyester microfiber composite isotherm spot to discuss the separation of 5 polyester microfiber composite adsorption modes for the adsorption modes,[link widoczny dla zalogowanych], but the literature did not locate their reports to analyze the mechanism of adsorption. Its positioning adsorption occurs. probably in the dyeing process. fiber hydroxyl, aid-based and dye molecules form a strong hydrogen bond,[link widoczny dla zalogowanych], this bond is in the formation and lift the state of dynamic equilibrium and the number of hydroxyl groups on the fiber content was not proportional to the . because of the adsorption isotherm can be made to see that the positioning of the future reduction of saturation adsorption adsorption Is] (ie isotherms in the linear part of the intercept on the vertical axis) is no less than the amount before the big shake, but no doubt After reducing the number of fiber surface hydroxyl groups will be increased to some extent. superfine fiber by reduction, the surface affinity lower positioning reduce its absorption may be due to hydrolysis, the adjacent part of the hydroxyl and carboxyl groups simultaneously, while the hydroxyl The spatial effect and electrical effects between dye and fiber will not easily form hydrogen bonds. The ordinary fiber, the positioning adsorption is too small, it is difficult to be reflected through the experiment, but this does not rule out the possibility of its existence. 6 Conclusions and further confirmed by experiments in low temperature dyeing of polyester microfiber exist in the process of binary Nernst and Langmuir adsorption possibilities. and its adsorption mechanism was analyzed positioning. (contributions date 1999-05-27, zip code Dyeing and Finishing Volume 21 200051 11 Park handsome ∞ ∞ m ∞
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