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Research Article

Improving the Dyeing Properties of Peanut Skin Extracts to Flax Fabrics by Chitosan Pretreatment

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Figures & data

Figure 1. Effect of chitosan dosage on K/S values of the flax fabrics dyed with PSE.

Figure 1. Effect of chitosan dosage on K/S values of the flax fabrics dyed with PSE.

Figure 2. Effect of chitosan pretreatment temperature on K/S value of flax fabric dyed with PSE.

Figure 2. Effect of chitosan pretreatment temperature on K/S value of flax fabric dyed with PSE.

Figure 3. SEM images for (a) untreated, (b) chitosan pretreated and (c) chitosan pretreated and dyed flax fabrics.

Figure 3. SEM images for (a) untreated, (b) chitosan pretreated and (c) chitosan pretreated and dyed flax fabrics.

Figure 4. EDS mapping and spectrum of the chitosan pretreated flax fabric.

Figure 4. EDS mapping and spectrum of the chitosan pretreated flax fabric.

Figure 5. FTIR spectra of (1) peanut skin extracts powder and (2) the original flax fabrics: (a) untreated flax fabric, (b) chitosan pretreated flax fabric and (c) chitosan pretreated and dyed flax fabrics.

Figure 5. FTIR spectra of (1) peanut skin extracts powder and (2) the original flax fabrics: (a) untreated flax fabric, (b) chitosan pretreated flax fabric and (c) chitosan pretreated and dyed flax fabrics.

Figure 6. Possible interaction between cellulose, chitosan and catechin in PSE.

Figure 6. Possible interaction between cellulose, chitosan and catechin in PSE.

Figure 7. Effect of the dyeing pH value on the K/S value of the dyed flax fabrics with PSE.

Figure 7. Effect of the dyeing pH value on the K/S value of the dyed flax fabrics with PSE.

Table 1. The color characteristic values of the dyed flax fabrics at different pH values (λ = 400 nm).

Figure 8. (A) the UV-vis absorption curves and (b) the images of the extracted liquid from PS with different pH value; (c) Images of the dyed flax fabrics with PSE at different dyeing pH.

Figure 8. (A) the UV-vis absorption curves and (b) the images of the extracted liquid from PS with different pH value; (c) Images of the dyed flax fabrics with PSE at different dyeing pH.

Figure 9. (A) Effects of the dyeing temperature and chitosan pretreatment on the K/S values of dyed flax fabrics with PSE; (b) Images of the dyed flax fabrics with PSE at different dyeing temperature.

Figure 9. (A) Effects of the dyeing temperature and chitosan pretreatment on the K/S values of dyed flax fabrics with PSE; (b) Images of the dyed flax fabrics with PSE at different dyeing temperature.

Table 2. The color characteristic values of the flax fabrics dyed at different temperatures (λ = 400 nm).

Table 3. The mechanical properties of the flax fabrics before and after dyeing at the different temperatures.

Table 4. Fastness properties of the dyed flax fabrics with PSE by different method.

Table 5. Ultraviolet protection properties of the dyed fabrics with PSE by different dyeing method.

Figure 10. Fluorescence properties of the flax yarns taken out from the flax fabrics (a) untreated flax (b) direct dyed flax (c)chitosan pretreated flax (d) chitosan pretreated and dyed flax.

Figure 10. Fluorescence properties of the flax yarns taken out from the flax fabrics (a) untreated flax (b) direct dyed flax (c)chitosan pretreated flax (d) chitosan pretreated and dyed flax.

Table 6. Radical scavenging activity of the flax fabrics after different treatment methods.