C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 7/42 (2006.01) C04B 14/34 (2006.01)
Patent
CA 2722945
23 "Large Scale Production of Carbon Nanotubes in Portland Cement" The present invention describes a chemical vapor-phase deposition for carbon nanotube synthesis in which cement clinker is used as a ceramic matrix for anchoring transition-metal nanoparticles. Using cement clinker as nanoparticle anchoring base of transition metals allows carbon nanotubes to be generated on cement clinker particles and grains, in this way producing a kind of cement that is nanostructured with carbon nanotubes. By this process, the carbon nanotube synthesis and integration to clinker are carried out in just one continuous and large-scale stage. The process described herein can be applied to conventional cement industry whose production may be rated as tons per day. The present invention also proposes - as part of the carbon nanotube synthesis on cement clinker - several enrichment alternatives of cement clinker by using transition metals for producing such nanostructured composite, which may or not be integrated to the conventional cement industry.
A presente invenção descreve um processo de deposição química da fase vapor para a síntese de nanotubos de carbono, no qual o clínquer de cimento e usado como matriz ceramica catalisadora do processo ou como ancoramento de nanopartículas de metais de transição. A utilização do clínquer de cimento como suporte de ancoramento de nanoparticulas, de metais de transição permite que os nanotubos de carbono sejam gerados sobre as particulas, e grãos do clínquer de cimento permitindo assim, a produção de um tipo de cimento nanoestruturado com nanotubos de carbono em que a síntese e integração de nanotubos de carbono ao clínquer são feitos em uma ?nica etapa de modo continuo e em larga escala. O invento propõe, também, como parte do processo de sintese de nanotubos de carbono sobre o clinquer de cimento várias alternativas de enriquecimento do mesmo com metais de transição para a produção deste comp?sito nanoestruturado de forma integrada ou não à indústria convencional de cimento.
de Oliveira Sergio
de Souza Avila Erick
Eleto Da Silva Edelma
Gribel Lacerda Rodrigo
Lorencon Eudes
Gowling Lafleur Henderson Llp
Universidade Federal de Minas Gerais-Ufmg
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