期刊
CERAMICS INTERNATIONAL
卷 45, 期 7, 页码 8150-8156出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.01.116
关键词
Polymer derived ceramics; Mesoporous; Pyrolysis; X-Ray computed tomography; Specific surface area
资金
- Science and Engineering Research Board, Department of Science and Technology, Government of India [ECR/2016/000525]
The present work focuses on establishing the role of polysiloxane precursors in the synthesis of aligned porous polymer derived silicon oxycarbide ceramics. The precursors used for the synthesis are, polymethylhydrosiloxane, vinyl terminated polydimethylsiloxane and cyclic tetramethyl-tetravinlycyclotetrasiloxane. Hydrotalcite is used for attaining aligned macroporosity during the crosslinking stage itself. Subsequently, pyrolysis of the sample has been carried out to synthesize the ceramics. The evolution of pore structure in these PDCs during the crosslinking and pyrolysis is co-related to the thermal decomposition behaviour. The pore morphology, structure and the size were analyzed using SEM, X-ray computed tomography and BET. Our studies confirm the presence of bimodal porosity in these PDCs. These PDCs have a specific surface area ranging from 77 to 160 m(2)/g and a total pore volume ranging from 0.18 to 0.29 cm(3)/g. These results could be significant for achieving a controlled synthesis process of porous materials suitable for various applications like adsorption, filtering and electrochemical storage.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据