Molecular motion, morphology and properties of 3-isocyanato-propyltriethoxysilane-modified multi-walled carbon nanotube/epoxy composites

Author

Sheng-Yen Wu ; Siu-Ming Yuen ; Ma, Chen-Chi M. ; Yuan-Li Huang ; Chih-Chun Teng

Author_Institution

Dept. of Chem. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

6

Issue

6

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

463

Lastpage

467

Abstract

In this study, both epoxy resin and multi-wall carbon nanotubes (MWCNTs) were modified with 3-isocyanato-propyltriethoxysilane (IPTES). Scanning electron microscopy and transmission electron microscopy microphotographs show that the MWCNTs dispersed well in the epoxy matrix. The molecular motion of silane-modified MWCNT/epoxy composites was studied using high-resolution solid-state ¹³C NMR. Results show that 1 wt silane-modified MWCNT/epoxy composite exhibits less molecular motion than composite with a lower silane-modified MWCNT content. The glass transition temperature (T_g) of the neat epoxy is 192.6°C and increases to 212.5°C with 1°wt° IPTES-MWCNT content. Dynamic mechanical analysis data of the MWCNT/epoxy composites show the storage modulus at 50°C and the T_g of the IPTES-modified epoxy increased with IPTES-MWCNT content.

Keywords

carbon nanotubes; elastic moduli; glass transition; nanocomposites; nuclear magnetic resonance; resins; scanning electron microscopy; transmission electron microscopy; 3-isocyanato-propyltriethoxysilane-modified multi-walled carbon nanotube-epoxy composites; C; dynamic mechanical analysis; glass transition temperature; high-resolution solid-state ¹³C NMR; molecular motion; scanning electron microscopy; storage modulus; temperature 50 degC; transmission electron microscopy;

fLanguage

English

Journal_Title

Micro & Nano Letters, IET

Publisher

iet

ISSN

1750-0443

Type

jour

DOI

10.1049/mnl.2011.0138

Filename

5960474