کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5440346 1398227 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Engineering durable hydrophobic surfaces on porous alumina ceramics using in-situ formed inorganic-organic hybrid nanoparticles
ترجمه فارسی عنوان
مهندسی سطوح هیدروفوبیک دوام بر روی سرامیک آلومینیوم متخلخل با استفاده از نانوذرات هیبرید غیر آلی- آلی
کلمات کلیدی
سطح هیدروفوب مقاوم در برابر، آلومینا، پلی متیل سیلوکسان، پیرولیز، نانوذرات ترکیبی غیر آلی- آلی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
Hydrophobic surfaces are required for a variety of applications owing to their water repellent and self-cleaning properties. In this work, we present a novel approach to prepare durable hydrophobic surfaces on porous ceramics. A polydimethylsiloxane (PDMS) film was applied to a porous alumina wafer, followed by pyrolysis at 400 °C in a non-oxidizing atmosphere (H2:N2 = 5:95), giving rise to nanoparticles. In these particles, Si, C and O elements formed amorphous networks to which methyl groups that had survived the pyrolysis were bonded. The as-modified porous alumina wafer was hydrophobic with a water contact angle of 136°, which is attributed to the presence of the methyl groups. The hydrophobicity was maintained after immersion in aqueous solutions in a pH range of 2-12 and acetone. The hydrophobicity was also retained after exposure to temperatures as high as 450 °C in an oxidative atmosphere (air) and after mechanical abrasion with sandpaper. The hydrophobic porous alumina ceramics developed in the present study are promising for use as membranes in various separation processes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 37, Issue 15, December 2017, Pages 4843-4848
نویسندگان
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