کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1473486 991046 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of the polymer–polymer miscibility on the formation of mesoporous SiC(O) ceramics for highly efficient adsorption of organic dyes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Influence of the polymer–polymer miscibility on the formation of mesoporous SiC(O) ceramics for highly efficient adsorption of organic dyes
چکیده انگلیسی

In this paper, we use methyl-terminated polydimethylsiloxane (PDMS) as a pore-former and allylhydridopolycarbosilane (AHPCS) as a preceramic precursor to fabricate mesoporous SiC(O) ceramics by using liquid-liquid phase separation combined with cross-linking and emulsion processing. The influence of the polymer-polymer miscibility on the formation of mesoporous SiC(O) ceramics was investigated, with PDMS (350 cP) as porogen and AHPCS and polysiloxane (PSO) as preceramic precursors, respectively. Mesoporous SiC(O) with a specific surface area of 87.83 m 2g−1 and an average pore size of ca. 5 nm was produced by pyrolysis of a polymeric gel obtained from AHPCS/PDMS blends. In contrast, with PSO/PDMS blend as the starting material, mesopores were not formed in the final ceramics. In case of the AHPCS/PDMS blends, the polymer-to-ceramic transformation, the formation and the characteristic features of the mesopores were investigated by FT-IR, TGA, OM, SEM and N2 sorption isothermal analysis. The polymer-polymer miscibility between the preceramic polymer and the porogen polymer significantly influences the formation of the mesoporous ceramics. The final mesoporous SiC(O) ceramic obtained at 900 °C can withstand up to 1400 °C without significant change of the porosity. The resultant mesoporous SiC(O) shows highly efficient adsorption towards a model organic dye, namely Rhodamine B.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 36, Issue 15, November 2016, Pages 3627–3635
نویسندگان
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