Transport of acid dye in nylon and concentration dependence of the diffusion coefficient

✍ Scribed by Eizo Sada; Hidehiro Kumazawa; Shinichi Mizutani; Tetsuo Ando

• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 439 KB
• Volume: 33
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1987.070330204

✦ Synopsis

The dyeing kinetics of an acid dye (C.I. Acid Blue 40) in a nylon 6 film were investigated using partition-cell and film-roll methods at 80°C and pHs 2.3 and 3.05. The concentration dependence of diffusion coefficient of the dye in the nylon substrate measured by both methods was interpreted in terms of parallel diffusion with bimodal sorption of the Nernst and Langmuir modes. As the concentration of dye increases, the transport of dye inside the nylon film becomes dominated by pore diffusion and surface diffusion of sorbed Nernst populations.