Dispersion of Carbon Nanotubes in Polysilazanes for the Preparation of Reinforced Si-C-N Composites

Fernandez, L.; Li, Y.; Burghard, M.; Burghard, Z.; Gerstel, P.; Aldinger, Fritz

doi:10.4028/3-908454-00-x.231

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2016

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“…The first study about polysilazane-CNT composites [15] was in 2004 and up to now only few others followed [16][17][18][19][20][21]. The filler dispersion in the polymer matrix is usually poorly described and realized following different methods such as functionalized CNTs, surfactants or direct sonication of the filler in organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Rapid carbon nanotubes suspension in organic solvents using organosilicon polymers

Dalcanale

Grossenbacher

Blugan

et al. 2016

Journal of Colloid and Interface Science

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A strategy for a simple dispersion of commercial multi-walled carbon nanotubes (MWCNTs) using two organosilicones, polycarbosilane SMP10 and polysilazane Ceraset PSZ20, in organic solvents such as cyclohexane, tetrahydrofuran (THF), m-xylene and chloroform is presented. In just a few minutes the combined action of sonication and the presence of Pt(0) catalyst is sufficient to obtain a homogeneous suspension, thanks to the rapid hydrosilylation reaction between SiH groups of the polymer and the CNT sidewall. The as-produced suspensions have a particle size distribution <1μm and remain unchanged after several months. A maximum of 0.47 and 0.50mg/ml was achieved, respectively, for Ceraset in THF and SMP10 in chloroform. Possible applications as polymeric and ceramic thin films or aerogels are presented.

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