پوشش ابرآب‌گریز شفاف غیر فلوئوردار با عملکرد ضدیخ‌زدگی بهبود‌یافته

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه پژوهشی پوشش‌های سطح و خوردگی، پژوهشکده پوشش‌های سطح و فناوری‌های نوین، پژوهشگاه رنگ، تهران، ایران، صندوق‌پستی: 654- 16765

10.30509/jcst.2026.167881.1293

چکیده

توسعه پوشش‌های ابرآب‌گریز غیر فلوئوردار که شفافیت نوری را با عملکرد ضدیخ‌زدگی پایدار تلفیق کنند، همچنان چالش‌برانگیز است. در این مطالعه، پوششی بر پایه پیونده آلکوکسی‌سیلان، نانوذرات سیلیکای دودشده (Fumed silica nanoparticles) و متیل‌تری ‌اتوکسی‌سیلان (MTES)، به روش پاششی دومرحله‌ای تهیه شد. متیل‌تری‌اتوکسی‌سیلان با هدف تقویت اتصال بین‌سطحی میان نانوذرات و پیونده به سامانه افزوده شد؛ با این‌ حال، سهم مستقل آن با استفاده از نمونه شاهد فاقد متیل‌تری‌اتوکسی‌سیلان تفکیک نشد. پوشش حاصل، زاویه تماس آب °169 و عبوردهی نوری حدود ۸۳ درصد در ناحیه مرئی نشان داد. این پوشش پس از مواجهه با جت آب، ۳۰ چرخه جداسازی نوارچسب و ۲۰ چرخه سایش با سمباده، ویژگی ابرآب‌گریزی خود را حفظ کرد. ابرآب‌گریزی همچنین پس از 28 ساعت غوطه‌وری در سوسپانسیون‌های آلاینده و محلول‌های اسیدی و قلیایی مورد آزمون حفظ شد. رفتار خودتمیزشوندگی در هر دو شرایط آلودگی مرطوب و خشک مشاهده شد. در آزمون هل‌دادن یخ، استحکام چسبندگی یخ پس از ۱۵ چرخه یخ‌زدگی–ذوب از ۱۳.3 به ۱۵.۷ کیلوپاسکال افزایش یافت که معادل افزایشی حدود 18 درصد است. این یافته‌ها عملکرد هم‌زمان آب‌دافعی، خودتمیزشوندگی و یخ‌گریزی پوشش را در شرایط آزمون نشان می‌دهند. برای تعیین سهم متیل‌تری‌اتوکسی‌سیلان و ارزیابی مناسب ‌بودن پوشش برای کاربردهای عملی، انجام مطالعات تکمیلی کنترل‌شده و بررسی پیرسازی طولانی‌مدت ضروری است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Transparent Fluorine-Free Superhydrophobic Coating with Enhanced Anti-Icing Performance

نویسندگان [English]

  • Pooneh Kardar
  • Reza Amini
Department of Surface Coatings and Corrosion, Institute for Color, Science and Technology, P.O. Box: 16765-654, Tehran, Iran
چکیده [English]

Fluorine-free superhydrophobic coatings that combine optical transparency with durable anti-icing performance remain challenging to develop. In this study, a coating based on an alkoxysilane binder, fumed silica nanoparticles, and methyl-triethoxysilane (MTES) was prepared by two-stage spray coating. MTES was incorporated to promote interfacial coupling between the nanoparticles and the binder; however, its independent contribution was not isolated using a methyltriethoxysilane-free control. The coating exhibited a water contact angle of 169° and approximately 83% optical transmittance in the visible range. It retained its superhydrophobicity after water-jet exposure, 30 tape-peeling cycles, and 20 sandpaper-abrasion cycles. Superhydrophobicity was also retained after 28 h of immersion in the tested contaminant suspensions and acidic and alkaline solutions. Self-cleaning behavior was observed under both wet and dry contamination conditions. In the push-off test, ice adhesion strength increased from 13.1 to 15.7 kPa after 15 freeze–thaw cycles, corresponding to an increase of approximately 18 %. These findings demonstrate the coating's combined water-repellent, self-cleaning, and icephobic performance under the tested conditions. Further controlled and long-term aging studies are required to determine the contribution of methyltriethoxysilane and assess suitability for practical applications.

کلیدواژه‌ها [English]

  • Superhydrophobic coating Fluorine
  • free coating Anti
  • icing performance Fumed silica nanoparticles Self
  • cleaning Ice adhesion strength

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