Meso-Structuring of SiCN Ceramics by Polystyrene Templates

被引:16
作者
Ewert, Julia-Katharina [1 ]
Denner, Christine [1 ]
Friedrich, Martin [1 ]
Motz, Guenter [2 ]
Kempe, Rhett [1 ]
机构
[1] Univ Bayreuth, Anorgan Chem Catalyst Design 2, D-95440 Bayreuth, Germany
[2] Univ Bayreuth, Inst Ceram Mat Engn, D-95440 Bayreuth, Germany
关键词
POLYMER-DERIVED CERAMICS; STABILITY; PRECURSOR; ROBUST;
D O I
10.3390/nano5020425
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A simple one-pot synthesis of well-defined PS-silazane nano-composites (polystyrene, PS) is described. In contrast to the, thus far, used two-step procedure ((1) assembly of a PS template bed and (2) careful filling of the voids between the PS spheres), which is restricted to macro structuring, we are able to simply mix the PS template and a commercially available silazane precursor HTT-1800 in toluene. The key is the alteration of the zeta potential of the PS template leading to a homogeneous dispersion in the silazane-toluene mixture. Removal of solvent gives rise to a highly ordered PS-silazane nano-composites and subsequent pyrolysis leads to mesoporous silicon carbonitride (SiCN) materials. The one-pot procedure has two advantages: easy upscaling and the use of PS spheres smaller than 100 nm in diameter, here 60 nm. The PS template was characterized by photon correlation spectroscopy, zeta potential measurements, scanning electron microscopy (SEM), and thermal gravimetric analysis (TGA). The resulting mesoporous SiCN materials were analyzed by SEM, transmission electron microscopy (TEM), nitrogen sorption analysis, and Fourier transform infrared measurements (FT-IR).
引用
收藏
页码:425 / 435
页数:11
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