VASILICA POPESCU, IRINA CRINA ANCA SANDU, GABRIEL POPESCU<br>Analysis of the Behaviour of PAN Functionalized with Basic <br>Compounds, During Dyeing Process with Acid Dyes<br><br>

VASILICA POPESCU, IRINA CRINA ANCA SANDU, GABRIEL POPESCU
Analysis of the Behaviour of PAN Functionalized with Basic
Compounds, During Dyeing Process with Acid Dyes

Abstract:

Romanian acrylic fibers (PAN) were functionalized with substances that have different basicities: NaOH (pKb = 0.2), Chitosan (CS with pKb = 7.8) and hydroxyl amine (HA with pKb = 8.02). All the chemical changes that occur on the acrylic support during functionaliazation were evaluated with FTIR analysis and colorimetric method. Dyeings with non-specific dyes (acid dyes) using different concentrations, durations, and pHs were performed. The influence exerted on the K / S values was studied function of the reagents type used in functionalization. Comparing the tinctorial behaviors of the acrylic functionalized substrates were deducted the ideas as HA and HA+NaOH cause the chemical changes that most favor the dyeing with acid dyes. Durability of the functionalization effects has been demonstrated by good values for the resistances to wet treatments. The color differences (DE*, DL*, Da* Db*, DC* and DH*) indicate that any functionalized PAN sample is dyed more intensely than the witness, having brightness smaller and shades slightly different than of the witness. Keywords: functionalized PAN, chitosan, hydroxyl amine, acid dye, dyeing

Issue: 2015, Volume 66, Issue 12

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