کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
674807 1459577 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Properties of carbon nanotube nanofluids stabilized by cationic gemini surfactant
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Properties of carbon nanotube nanofluids stabilized by cationic gemini surfactant
چکیده انگلیسی

Stable water based nanofluids containing multi-walled carbon nanotubes (MWNTs) were prepared using cationic gemini surfactant as stabilizer. Zeta potential measurements and Fourier transformation infrared spectra were employed to study the absorption mechanisms of the surfactants on the MWNT surfaces. The stability of the nanofluids was obtained using UV–vis absorption method. Results of thermal conductivity indicate that higher concentration of cationic gemini surfactant is a negative factor in improving the thermal conductivity of nanofluids. Increase of spacer chain length of cationic gemini surfactant gives rise to the sediment of MWNTs in the nanofluids, resulting in decrease of thermal conductivity enhancement of MWNT nanofluids. Mechanical ball-milling technology would be a new method to pretreat the pristine MWNTs, and using this method nanofluids with optimized thermal properties can be obtained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 506, Issues 1–2, 10 July 2010, Pages 62–66
نویسندگان
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