Fabrication of Hydrogen-Selective Silica Membranes via Pyrolysis of Vapor Deposited Polymer Films
Fabrication of Hydrogen-Selective Silica Membranes via Pyrolysis of Vapor Deposited Polymer Films
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通过气相沉积聚合物薄膜的热解制备氢选择性二氧化硅膜
DOI：
10.1021/acs.iecr.9b02902
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Gupta, Malancha
中科院分区：
文献类型：
--
作者：
Nguyen, Bryan;Dabir, Sasan;Tsotsis, Theodore;Gupta, Malancha
在蒸汽重整条件下有效分离氢气对于开发清洁能源是重要的。尽管具有高通量和大分离因子的高温和蒸汽稳定的膜对于这样的应用是有价值的，但是它们的制造仍然是一个挑战。硅基陶瓷膜由于其耐高温性和优异的化学稳定性而特别有前途。在这项研究中，我们提出了一种新的合成路线，用于制造纳米多孔，不对称膜，通过热解的含硅聚合物薄膜沉积引发化学气相沉积（iCVD）大孔碳化硅支持。具体而言，我们系统地研究了聚（2，4，6，8-四乙烯基-2，4，6，8-四甲基环四硅氧烷）膜在不同热解温度下化学结构的变化，发现在1100 °C下发生完全转变为二氧化硅膜。测试了由不同尺寸的碳化硅粉末组成的三种不同载体用于膜制备。结果发现，与我们的方法形成的膜是微孔的分离因子的几倍以上相应的努森因子。因此，我们的合成路线为生产用于高温分离和传感器应用的硅基陶瓷膜提供了一种可扩展的无溶剂方法。
Efficient separation of hydrogen under steam reforming conditions is important for the development of clean energy sources. Although high-temperature and steam-stable membranes with high fluxes and large separation factors would be valuable for such an application, their fabrication remains a challenge. Silicon-based ceramic membranes are particularly promising due to their high temperature resistance and excellent chemical stability. In this study, we propose a new synthetic route for fabricating nanoporous, asymmetric membranes via the pyrolysis of silicon-containing polymer films deposited by initiated chemical vapor deposition (iCVD) on macroporous silicon carbide supports. Specifically, we systematically investigated the change in the chemical structure of poly(2,4,6,8-tetravinyl-2,4,6,8-tetramethyl cyclotetrasiloxane) films at different pyrolysis temperatures and found that the complete transition to a silica membrane occurred at ∼1100 °C. Three different supports composed of silicon carbide powders of varying sizes were tested for membrane preparation. It was found that membranes formed with our process were microporous with separation factors several times above the corresponding Knudsen factors. Our synthetic route, therefore, offers a scalable and solventless method for producing silicon-based ceramic membranes for high-temperature separation and sensor applications.
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A%20比较%20评估%20的%20氢%20脆化：%20钯%20和%20钯银%20（25%20重量%%20银）%20受制%20至%20氢%20吸收/解吸%20循环
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
Gilberto Jimenez;E. Dillon;Joseph Dahlmeyer;Travis Garrison;Tyler D. Garrison;Sedna Darkey;Kyle Wald;Joseph Kubik;D. Paciulli;Mustakim Talukder;J. Nott;Maria Ferrer;Joseph Prinke;P. Villaneuva;F. Massicotte;K. Rebeiz;S. Nesbit;A. Craft
通讯作者：
A. Craft
影响因子：
9.5
作者：
T. Tsuru;T. Morita;H. Shintani;Tomohisa Yoshioka;M. Asaeda
通讯作者：
T. Tsuru;T. Morita;H. Shintani;Tomohisa Yoshioka;M. Asaeda
DOI：
10.1111/j.1151-2916.1990.tb06499.x
发表时间：
1990-02-01
影响因子：
3.9
作者：
CARLSSON, DJ;COONEY, JD;WORSFOLD, DJ
通讯作者：
WORSFOLD, DJ
当硅基聚合物转变为陶瓷相时断裂开始
影响因子：
3.9
作者：
Raj, Rishi;Pederiva, Luca;Narisawa, Masaki;Soraru, Gian Domenico
通讯作者：
Soraru, Gian Domenico
影响因子：
3.3
作者：
Baxamusa, Salmaan H.;Im, Sung Gap;Gleason, Karen K.
通讯作者：
Gleason, Karen K.