کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1442024 1509430 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of different hard segments in polyurethane on the electrical conductivity of polyurethane grafted multi-walled carbon nanotube/polyurethane nanocomposites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
The effect of different hard segments in polyurethane on the electrical conductivity of polyurethane grafted multi-walled carbon nanotube/polyurethane nanocomposites
چکیده انگلیسی

Polyurethane (PU) grafted multi-walled carbon nanotubes (MWNTs) (PU-g-MWNTs) containing different hard segments (hexamethylene diisocyanate, HDI, and methylenediphnyl 4,4′-diisocyanate, MDI) were synthesized to fabricate an electro-conducting nanocomposite. The PU conducting nanocomposites were obtained using a simple blending method. PU-g-MWNTs can improve the interfacial compatibility between the MWNTs and PU matrix. The HDI-based PU nanocomposite showed enhanced dispersibility of the functionalized MWNTs than the MDI-based nanocomposite. The difference in dispersity was related to its electrical conductivity. The critical concentration of the MDI-based nanocomposite was lower than the HDI-based nanocomposite because less dispersed and more aggregated MWNTs partially formed a conducting path at a lower concentration. The critical exponent of the HDI-based nanocomposite revealed that the better dispersed MWNTs exhibited enhanced electrical conductivity, compared to the MDI-based nanocomposite, as the filler concentration was increased.


► Polyurethane (PU) was grafted on the surface of multi-walled carbon nanotubes.
► PU/PU-g-MWNTs film was obtained using a simple blending method.
► HDI-based PU film demonstrated homogeneously dispersed MWNTs in the matrix.
► The critical exponent of HDI film calculated based on fitted data was 2.43.
► HDI film led to enhanced electro-conductivity compared to the MDI film.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 161, Issues 13–14, July 2011, Pages 1361–1367
نویسندگان
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