Hostname: page-component-84b7d79bbc-lrf7s Total loading time: 0 Render date: 2024-07-26T07:37:31.306Z Has data issue: false hasContentIssue false
  • English
  • Français

Nanocomposite particles for the preparation of advanced nanomaterials

Published online by Cambridge University Press:  10 February 2011

P. Somasundaran  and
T. Chen
P. Somasundaran
Affiliation:
Langmuir Center for Colloids and Interfaces, Henry Krumb School of Mines, Columbia University, New York, NY 10027
T. Chen
Affiliation:
Langmuir Center for Colloids and Interfaces, Henry Krumb School of Mines, Columbia University, New York, NY 10027
Get access

Abstract

New composites based on nano-size particles provide a promising route to the fabrication of novel materials for advanced technology applications. To produce desired materials, it is important to control the composition and distribution of nanoclusters within the bulk or surface coating of nanostructured materials. Towards this purpose, we have developed a novel method of processing nanocomposite materials utilizing colloidal chemistry techniques to tailor their microstructure. Unique composite aggregates of nanoparticles with a core-shell structure were prepared using a special scheme of controlled polymer adsorption. Polymers which specifically adsorb on both nano- and micron- size particles are used as tethers to enable desired coating of the later particles with the former and to enhance the cluster integrity. Nanocomposite particles consisting of micron-size alumina or silicon nitride as cores and nano-size alumina, titania, or iron oxide as shell particles have been successfully prepared using this process. The surface charge of the core particles is reversed after the adsorption of polyacrylic acid polymers. This promotes the interaction between the core and the shell particles and therefore nanoparticles added subsequently to the core particle suspension coat on core particles by electrostatic as well as possibly hydrogen bonding bridging mechanisms. Success of the process depends to a large extent on the absence of homoflocculation of nanoparticles and this is achieved by removing all the unadsorbed free polymers from the bulk solution before introducing them to coat on the polymer coated core particles. Coating itself is estimated by monitoring change in the zeta potential of core-shell structure. The coating scheme as well as the characterization of these nanocomposite particles are discussed in detail. This processing scheme provides a simple way for the preparation of both bulk and surface coatings with these engineered nanostructured particles as building blocks.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 501: Symposium FF – Surface Controlled Nanoscale Materials for High-Added… , 1997 , 161
Copyright
Copyright © Materials Research Society 1998

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1 Siegel, R.W., in Physics of New Materials, edited by Fujita, F.E.. (Springer-Verlag, Berlin, 1994), p. 65.Google Scholar
2 Chakravorty, D. and Giri, A.K., in Chemistry of Advanced Materials, edited by Rao, C.N.R.. (Blackwell Scientific, London, 1993), pp. 217–235.Google Scholar
3 Aksay, I.A., in Forming of Ceramics, Advances in Ceramics Vol.9, edited by Mangels, J.A. and Messing, G.L.. (The American Ceramic Society, Columbus, OH, 1984), pp. 94–104.Google Scholar
4 Tadros, Th. F., Colloids & Surfaces, 18, 137–173 (1986).Google Scholar
5 Simon, C., in Coagulation and Flocculation: Theory and Applications, edited by Dobias, B., (Marcel Dekker, New York, 1993), pp. 495–537.Google Scholar
6 Cesarano, J. III, Aksay, I. A. and Bleier, A., J. Am. Ceram. Soc., 71 [4], 250–255 (1988).Google Scholar
7 Somasundaran, P. and Yu, X., Adv. in Coll. and Inter. Sci., 53, 31–49 (1994).Google Scholar
8 Fleer, G.J., Stuart, M.A. Cohen, Scheutjens, J.M.H.M., Cosgrove, T., and Vincent, B., Polymers at Interfaces, (Chapman & Hall, London, 1993), p. 1.Google Scholar
9 Sato, T. and Ruch, R., Stabilization of Colloidal Dispersion by Polymer Adsorption, Surfactant Science Series Vol.9, (Marcel Dekker: New York, 1980), p. 1.Google Scholar
10 Fleer, G.J. and Scheutjens, J.M.H.M., in Coagulation and Flocculation: Theory and Applications, Edited by Dobias, B., (Marcel Dekker, New York, 1993), pp. 209–263.Google Scholar
11 Mer, V.K. La and Smellie, R.H. Jr, J. Colloid Inter. Sci., 11, 704–709 (1956).Google Scholar
12 Yu, X. and Somasundaran, P., J. Colloid Inter. Sci., 177, 283–287 (1996).Google Scholar
13 Pelssers, E.G.M., Stuart, M.A. Cohen and Fleer, G.J., Colloids & Surfaces, 38, 15–25 (1989).Google Scholar
14 Rosen, M.J., Surfactants and Interfacial Phenomena, (John Wiley and Sons: New York, 1978), p. 40. Google Scholar
15 Desai, P.G. and Xu, Z., J. Am. Ceram. Soc., 78 [11], 2881–2888 (1995).Google Scholar
16 Marquez-Alvarez, C., Fierro, J.L., Guerrero-Ruiz, A., and Rodriguez-Ramos, I., J. Colloid Int. Sci., 159, 454–459 (1993).Google Scholar
17 Ohmori, M. and Matijevic, E., J. Colloid Int. Sci., 160, 288–292 (1993).Google Scholar
18 Jang, H.M., Moon, J.H., and Jang, C.W., J. Am. Ceram. Soc., 75 [12], 3369–3376 (1992).Google Scholar
19 Hu, C. and Rahaman, M.N., J. Am. Ceram. Soc., 75 [8], 2066–2070 (1992).Google Scholar
20 Luther, E., Lange, F.E., and Pearson, D.S., J. Am. Ceram. Soc., 78 [8], 2009–2014 (1995).Google Scholar
21 Wang, C.M., J. Mat. Sci., 31, 4709–4718 (1996).Google Scholar
22 Shaw, T.M. and Pethica, B.A., J. Am. Ceram. Soc., 69 [2], 88–93 (1986).Google Scholar
23 Malghan, S.G., Wang, P.S., Sivakumar, A., and Somasundaran, P., Composite Interfaces, 1 [3], 193–210 (1993).Google Scholar
24 Liden, E., Persson, M., Carlstrom, E., and Carlsson, R., J. Am. Ceram. Soc., 74 [6], 1335–1339 (1991).Google Scholar
25 Shields, J.E., in Ceramics and Glasses, Engineering Materials Handbook Vol. 4, (ASM International, Materials Park, OH, 1991), pp. 580–584.Google Scholar
26 Pratten, N.A., J. Mater. Sci., 16, 1737–1747 (1981).Google Scholar