Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/21810
Title: Cobalt hydroxide colloidal particles precipitation on nanoclay layers for the formation of novel nanocomposites of carbon nanotubes/nanoclay
Authors: Lau, KT 
Lu, M
Qi, JQ
Zhao, DD
Cheung, HY
Lam, CK
Li, HL
Keywords: Carbon nanotubes
Nanoclays
Nanocomposites
Issue Date: 2006
Publisher: Pergamon Press
Source: Composites Science and Technology, 2006, v. 66, no. 3-4, p. 450-458 How to cite?
Journal: Composites science and technology 
Abstract: Here we demonstrated the formation of Co(OH) 2 colloidal particles on the surface of nanoclay layers with pH-controlled ion precipitation. The brucite-like phase of Co(OH) 2 colloidal particles obtained exhibited a tendency for irregular growth with increasing pH. The precipitation of Co(OH) 2 colloidal particles on the nanoclay surface led to the formation of a weakly ordered layered structure in the nanoclay as evidenced by the change of (0 0 1) reflections in the nanoclay structure. Two processes, physical adsorption and chemical adsorption, should be involved in the precipitation of Co(OH) 2 particles on the nanoclay surface. The catalysis of the produced Co(OH) 2-nanoclay hybrid was proved by the growth of CNTs with chemical vapor deposition. Under the pH value of 9.5, the resulting CNTs created a network-like structure connecting the nanoclay flakes while the nanoclay structure displayed signs of degradation after the growth of CNTs within its interlayer space. The novel CNTs-nanoclay composite structure holds high potentials for application as advanced polymer reinforcements.
URI: http://hdl.handle.net/10397/21810
ISSN: 0266-3538
EISSN: 1879-1050
DOI: 10.1016/j.compscitech.2005.07.023
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