کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
618031 | 1455020 | 2011 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tribological performance of fluorinated polyimide-based nanocomposite coatings reinforced with PMMA-grafted-MWCNT
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Tribological performance of fluorinated polyimide-based nanocomposite coatings reinforced with PMMA-grafted-MWCNT Tribological performance of fluorinated polyimide-based nanocomposite coatings reinforced with PMMA-grafted-MWCNT](/preview/png/618031.png)
چکیده انگلیسی
The tribological behavior of PMMA-grafted-MWCNT nanocomposite coatings that were prepared by applying the direct casting method to aluminum surfaces was investigated. Amino-functionalized MWCNTs were first covalently functionalized with PMMA to introduce the interaction force. The PMMA-g-MWCNT exhibited a higher dispersive capacity in the 6FDA-based polyimide matrix than pure MWCNT composite due to strong interfacial interactions in the nanocomposite. The maximum possible amount of PMMA-g-MWCNT was 5Â wt.% because excessive MWCNT in the nanocomposites makes them fragile and brittle. Sliding tests were performed in ball-on-disk configurations under dry conditions. The normal contact force was 9.7Â N against a 12.7-mm-diameter steel ball resulting in a Hertzian circular contact stress of 0.65Â GPa. The sliding speed was 0.02Â m/s and sliding tests were continued until the coefficient of friction stabilized. The nanocomposite coating reinforced with 3Â wt.% MWCNT was the most stable and had the lowest coefficient of friction in this study. This was due to the formation of a thin, uniform friction film on the wear track during sliding, and we concluded that the friction film plays an important role in facilitating the stable frictional behavior of the nanocomposite coatings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Wear - Volume 271, Issues 7â8, 18 July 2011, Pages 1029-1038
Journal: Wear - Volume 271, Issues 7â8, 18 July 2011, Pages 1029-1038
نویسندگان
Jooheon Kim, Hyungu Im, M.H. Cho,