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By Huawu Liu; Xiaoming Qian; Knovel (Firm)

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Additional info for Advanced textile materials : selected, peer reviewed papers from the 2011 International Conference on Textile Engineering and Materials (ICTEM 2011), September 23-25, 2011, Tianjin, China

Example text

3 that the extract has the maximum absorbance λmax , and the absorbance of dilute solution at λmax is proportional to its concentration, so it indicate the appropriate extract temperature of rhubarb pigments is 80℃. 4. It can be seen from Figure 4 that the spectrophotometric curves of extracts under different acidic conditions overlap. The rhubarb extract under different pH value were yellow. The above results indicate that the rhubarb extract is quite stable under acidic conditions and suitable for dyeing wool fabrics.

But when H2O2 dosages exceed the range, the residual gum ratio will rise. Therefore more H2O2 dosage isn 't necessarily better, which coincide with relevant theoretical analysis of hydrogen peroxide. 3, the residual gum ratio is lowest when H2O2 dosages near the central point of design. With the extension of time, the residual gum ratio also gives declining tendency. Compared with the influence of NaOH concentration on residual gum ratio, the ratio change under the influence of the time within a small range.

The rubbing fastness of all the wool fabric samples has reached the national standard. From Table 3, the effects of four factors on K/S value are as follows according to range analysis: D>A>B>C, the effects of four factors on b* are as follows according to range analysis: D>C>A>B, according to the order from strong to weak. We can find that the amount of dye is the most important factor from the above results. Because the number of dye molecules per unit volume increases with the increase of the dye concentration, so the combination rate of dye molecules with fibers increases.

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