title   
  

Viscoelastic response of high volume fraction carbon nanotube-polymer nanocomposites with tailored wettability and controlled morphology

Pehlivan, Zeki Semih and Ürk, Deniz and Cebeci, Hülya and Öveçoğlu, M. Lütfi and Dönmez, Abdullah and Bulut, Osman and Cebeci, Fevzi Çakmak (2019) Viscoelastic response of high volume fraction carbon nanotube-polymer nanocomposites with tailored wettability and controlled morphology. Composite Structures, 208 . pp. 418-425. ISSN 0263-8223 (Print) 1879-1085 (Online)

[img]PDF - Registered users only - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
2557Kb

Official URL: http://dx.doi.org/10.1016/j.compstruct.2018.10.007

Abstract

As-grown VACNTs are subjected to mechanical densification by knock-down process to achieve higher volume fractions. In here, the preferential alignment of CNTs is preserved horizontally and an easy delamination of VACNTs are achieved to fabricate high volume fraction nanocomposites. Both physical and chemical properties of VACNTs such as alignment, quality, and purity etc. have been characterized by Raman spectroscopy, TGA, and SEM. The knocked-down VACNTs arrays are then used as ‘reinforcing ply’ with epoxy for PNCs fabrication. Since load transfer in between CNTs and epoxy is important to avoid interfacial slippage and reduction in loss factor, to increase interaction between CNTs and epoxy, ozone treatment was applied to CNTs. To observe the effect of ozone treatment on the viscoelastic response of polymer nanocomposites with non-ozone treated and ozone treated VACNT were tested by DMA under different frequencies. The ozone treatment time and CNT quality, investigated through Raman Spectroscopy, were correlated for viscoelastic properties. The results demonstrated that ozone treatment improved wettability and increased viscoelastic properties of PNCs under multi-frequency for short-term (<60 s) but resulted in a decrease in storage modulus when applied for in longer durations.

Item Type:Article
Uncontrolled Keywords:Vertically aligned carbon nanotubes; Polymer nanocomposites; Dynamic mechanical analysis; Ozone treatment; And wettability
Subjects:T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL500-777 Aeronautics. Aeronautical engineering
T Technology > TP Chemical technology > TP1080 Polymers and polymer manufacture
ID Code:38372
Deposited By:Fevzi Çakmak Cebeci
Deposited On:22 Aug 2019 16:04
Last Modified:22 Aug 2019 16:04

Repository Staff Only: item control page