سازوکار جذب رنگزاهای اسیدی بر روی نخ ابریشمی اصلاح شده با نانوساختار بتاسایکلودکسترین

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه پژوهشی هنرهای سنتی، پژوهشگاه میراث فرهنگی و گردشگری، تهران، ایران. صندوق پستی: 11167-13437

2 دانشکده مهندسی نساجی، دانشگاه صنعتی امیرکبیر، تهران، ایران. صندوق پستی: 4413-15875

چکیده

در این پژوهش، نخ ابریشمی صمغ­گیری شده با نانوساختار بتاسایکلودکسترین (β-CD) توسط اتصال دهنده دو عامله سوکسینیک‌اسید (SUA) اصلاح شد. سپس، نمونه­های ابریشمی اصلاح شده با سه رنگزای اسیدی با وزن و ساختارهای شیمیایی متفاوت به روش­های متداول (در حضور اسید) و غیرمتداول (بدون حضور اسید) رنگرزی شدند. برای ارزیابی فرایند اصلاح سطح و تشکیل کمپلکس در هم جای از آنالیزهای شناخته شده فروسرخ تبدیل فوریه (FTIR)، بازتاب کلی ضعیف شده- فروسرخ تبدیل فوریه (ATR-FTIR)، میکروسکوپ الکترون روبشی (SEM)، پراش پرتو ایکس (XRD) و طیف­سنجی مرئی فرابنفش (UV-Visible) استفاده شده است. نتایج نشان می­دهد که حضور بتاسایکلودکسترین به بهبود جذب رنگزاها کمک قابل­توجهی نموده است و نقش اسید نیز بر سازوکار جذب ماده رنگزا بسیار موثر است. بهبود جذب رنگزا می‌تواند مربوط به اتصالات شیمیایی (یونی و هیدروژنی) و فیزیکی (تشکیل کمپلکس در هم جای و حبس فیزیکی در شبکه پلیمری سه‌بعدی) باشد. به‌علاوه، حضور بتاسایکلودکسترین نیز بر روی ثبات­های عمومی رنگی (شستشویی، نوری و سایشی) تاثیر منفی نداشته است، بنابراین، ثبات­های رنگی اغلب نمونه­ها بدون تغییر باقی‌مانده و یا کاهشی را نشان نمی­دهند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Mechanism of Acid Dyes Adsorption on Silk Yarn Modified with β-Cyclodextrin Nanostructure

نویسندگان [English]

  • Samera Salimpour Abkenar 1
  • Reza Mohammad Ali Malek 2
  • Negar Daeichini 2
1 Research Group of Traditional Arts, Research Institute of Cultural Heritage and Tourism (RICHT), P. O. Box: 1343711167, Tehran, Iran
2 Department of Textile Engineering, Amirkabir University of Technology, P. O. Box: 158754413, Tehran, Iran
چکیده [English]

This research modified the degummed silk yarn with β-cyclodextrin (β-CD) using Succinic acid (SUA). Then, the modified silk yarn was dyed with three different acid dyes through usual (with acid) and unusual (without acid) methods. The surface modification and inclusion complex were characterized by well-known analyses such as Fourier transform infrared (FTIR), attenuated total reflectance-FTIR (ATR-FTIR), Scanning electron microscope (SEM), X-ray diffraction (XRD), and UV-visible. Results show that the presence of the β-CD has markedly enhanced the dye adsorption, and also, the acid has an effective role in the dye adsorption mechanism. The improvement of dye adsorption can be related to chemical (H-bonding and ionic) and physical (inclusion complex and encapsulation into tridimensional polymeric network) interactions. In addition, the β-CD had no negative effect on the color fastness (wash, light, and rubber) of the modified silk samples, so the color fastness of most samples remained unchanged or did not show a noticeable decrease.

کلیدواژه‌ها [English]

  • β
  • Cyclodextrin nanostructure Silk Inclusion complex Acid dyes

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