مروری بر روش‌های مختلف زدودن ماده رنگزای دیسپرس از سطح الیاف پلی‌استر رنگرزی‌شده

نوع مقاله : مقاله مروری

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشکده مهندسی نساجی، دانشگاه صنعتی اصفهان، اصفهان، ایران، صندوق پستی ۸۴۱۵۶۸۳۱۱۱.

2 استادیار، دانشکده مهندسی نساجی، دانشگاه صنعتی اصفهان، اصفهان، ایران، صندوق پستی ۸۴۱۵۶۸۳۱۱۱.

چکیده

رنگرزی الیاف پلی‌استر عموماً با موادرنگزای دیسپرس صورت می‌گیرد، وجود مواد رنگزای سطحی از مشکلات این رنگرزی است که سبب کاهش ثبات مرطوب، سایشی و تصعیدی این الیاف رنگرزی شده به‌ویژه در عمق‌های رنگرزی بالا می‌گردد. لذا حذف موادرنگزای سطحی در این رنگرزی‌ها ضروری است. فرآیندی که به‌طورمعمول برای حذف این موادرنگزای سطحی انجام می‌شود، شستشوی احیایی است که در آن از دی تیونیت سدیم به‌عنوان احیاکننده‌ و از هیدروکسید سدیم‌‌ به‌عنوان قلیا استفاده می‌شود. این عملیات در زدودن الیگومرهای سطحی و نیز سایر مواد شیمیایی همراه الیاف رنگرزی‌شده مانند حامل نیز نقش دارد. متأسفانه این فرآیند آلاینده محیط‌زیست است و همچنین مشتقات حاصل از مواد کاربردی در آن، برای انسان مضر هستند و مسائل فناورانه و اقتصادی با این فرآیند همراه است. در سال‌های اخیر، تحقیقات متعددی برای زدودن موادرنگزای دیسپرس سطحی با روش‌های جایگزین که دارای عملکردی مناسب اما با آلایندگی کمتر باشند، صورت پذیرفته است. ازجمله این روش‌های جایگزین می‌توان به استفاده از موادفعال‌سطحی، استفاده از آنزیم‌ها، استفاده از عوامل احیایی متفاوت، شستشوهای اکسیدی، روش کاتالیزور نوری، استفاده از پلاسما، روش الکتروشیمیایی و نیز استفاده از موادرنگزای دیسپرس خاص سنتزشده که به سادگی زدوده می‌شوند، اشاره کرد. هر یک از این فرآیندهای جایگزین، دارای مزایا و معایبی هستند و استفاده از آن‌ها نیازمندی‌های ویژه دارد. در مقاله حاضر، فرآیندهای مختلف زدودن موادرنگزای سطحی دیسپرس از الیاف پلی استر رنگرزی‌شده بررسی و مقایسه می‌شوند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

A Review on the Different Methods of Clearing Disperse Dyes from the Surface of the Dyed Polyester Fibre

نویسندگان [English]

  • Armaghan Jozi 1
  • Hossein Izadan 2
1 ِDepartment of Textile Engineering, Isfahan University of Technology, P. O. Box: 8415683111, Isfahn, Iran.
2 Department of Textile Engineering, Isfahan University of Technology, P. O. Box: 8415683111, Isfahn, Iran.
چکیده [English]

The deposits of dispersed dyes on dyed polyester fibres are an important problem in polyester fibre dyeing that should be tackled properly. These dyes deteriorate the wash, rubbing, and sublimation fastness and the brightness of the dyed fibres, especially deep-dyed ones. Therefore, clearing these surface dyes is necessary. Conventionally, a reduction clearing process is used to remove the surface dyes, in which sodium dithionite, a reductant, and sodium hydroxide, an alkaline, are used. This process has a significant part in removing surface oligomers and auxiliaries, such as carriers. Unfortunately, this process is not environment friendly, and the derivatives of its chemicals are toxic to human health, and there are technological and economic issues associated with this process. In recent years, numerous research for removing surface dispersed dyes by alternative, less-pollutant, and more efficient processes have been proposed. These alternative processes include surfactants, enzymes, and other reductants, oxidative clearing, plasma, electrochemical methods, and the application of easily clearable synthesized dyes. Each of these proposed processes has its own pros and cons, and they have special needs. In the present review paper, various processes of clearing surface dispersed dyes from the dyed polyester fibres are investigated and compared with the traditional reduction-clearing process.

کلیدواژه‌ها [English]

  • Polyester fibres
  • Dyeing
  • Disperse dye
  • Reduction clearing
  • Alternative methods

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مطالعات در دنیای رنگ
دوره 12، شماره 3
آذر 1401
صفحه 241-252

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سابقه مقاله

  • تاریخ دریافت: 13 شهریور 1401
  • تاریخ بازنگری: 30 آبان 1401
  • تاریخ پذیرش: 01 آذر 1401

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