Functionalization of multi-walled carbon nanotubes with a silane coupling agent and synthesis of polyimide nanocomposite.
Multi-walled carbon nanotubes (MWCNTs) were modified with an H2SO4/HNO, acid treatment, and subsequently functionalized with a (3-glycidyloxyporpl)trimethoxysilane coupling agent. The functionalized MWCNTs showed considerably improved dispersion in H2O and N-Methyl-2-pyrrolidinone (NMP), and the MWCNT suspension exhibited long-term stability. The functionalized MWCNTs were characterized with Raman spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, and scanning electron microscopy (SEM) with an attached energy dispersive X-ray analyzer. Polyimide (PI)/MWCNT nanocomposites were synthesized from 4,4'-oxydianiline (ODA) and 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) using NMP as solvent. Improved MWCNT dispersion and enhanced interfacial adhesion were observed on the tensile fracture surfaces of the polyimide nanocomposite with functionalized MWCNTs.
Composites and Coatings Center, National Institute for Materials Science, Sengen, Tsukuba, 305-0047, Japan.
Qingxin
Q
Zhang
Kimiyoshi
K
Naito
Yutaka
Y
Kagawa