کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5186328 1381101 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermodynamic approach to enhanced dispersion and physical properties in a carbon nanotube/polypeptide nanocomposite
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Thermodynamic approach to enhanced dispersion and physical properties in a carbon nanotube/polypeptide nanocomposite
چکیده انگلیسی

A high molecular weight synthetic polypeptide has been designed which exhibits favorable interactions with single wall carbon nanotubes (SWCNTs). The enthalpic and entropic penalties of mixing between these two molecules are reduced due to the polypeptide's aromatic sidechains and helical secondary structure, respectively. These enhanced interactions result in a well dispersed SWCNT/Poly (l-Leucine-ran-l-Phenylalanine) nanocomposite with enhanced mechanical and electrical properties using only shear mixing and sonication. At 0.5 wt% loading of SWCNT filler, the nanocomposite exhibits simultaneous increases in the Young's modulus, failure strain, and toughness of 8%, 120%, and 144%, respectively. At 1 kHz, the same nanotube loading level also enhances the dielectric constant from 2.95 to 22.81, while increasing the conductivity by four orders of magnitude.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 50, Issue 8, 9 April 2009, Pages 1925-1932
نویسندگان
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