Development of high-performance sub-nanoporous SiC-based membranes derived from polytitanocarbosilane
Development of high-performance sub-nanoporous SiC-based membranes derived from polytitanocarbosilane
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开发源自聚钛碳硅烷的高性能亚纳米孔碳化硅基膜
DOI：
10.1016/j.memsci.2019.117688
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发表时间：
2020
影响因子：
9.5
通讯作者：
Tsuru Toshinori
中科院分区：
文献类型：
--
作者：
Wang Qing;Kawano Yuta;Yu Liang;Nagasawa Hiroki;Kanezashi Masakoto;Tsuru Toshinori
通过膜分离乙酸甲酯和甲醇等共沸混合物是一个有趣且具有挑战性的问题，因为膜必须能够承受这些刺激性溶剂并提供良好的通量和选择性。碳化硅基膜因其高机械强度、结构稳定性和高温下的耐腐蚀性而引起了人们的极大兴趣。在此，我们描述了聚钛碳硅烷（TiPCS）的首次使用，它被称为连续 Si-Ti-C-O 纤维（Tyranno）的前体，用于制备掺钛 SiC 基膜，用于渗透蒸发（PV）去除水或甲醇，并描述了水热稳定性的评估。在本研究中，通过 TG-MS、ATR-FTIR、XPS、XRD 和 N2 吸附-解吸等温线对 TiPCS 衍生材料在热解过程中的物理和化学性质进行了表征。 TiPCS 衍生陶瓷粉末的孔隙特征和表面积表明，TiPCS 中的钛成分在高温下抑制和/或减少网络结构的致密化。 TiPCS 衍生的 SiC 基膜的网络结构表现出与 TiPCS 衍生的陶瓷粉末相似的趋势。在 750 °C 下制备的膜具有重现性和有吸引力的选择性，可用于从液体混合物中光伏去除水或甲醇。
The separation of azeotropic mixtures such as methyl acetate and methanol via a membrane is an interesting and challenging issue, since the membrane must be able to withstand these harsh solvents and provide good flux and selectivity. SiC-based membranes have attracted a great deal of interest due to their high mechanical strength, structural stability, and corrosion resistance at elevated temperatures. Herein, we describe the first use of polytitanocarbosilane (TiPCS), which is known as a precursor of continuous Si–Ti–C–O fibers (Tyranno), in the preparation of Ti-incorporated SiC-based membranes for the pervaporation (PV) removal of water or methanol, and describe the evaluation of hydrothermal stability. For this study, the physical and chemical properties of TiPCS-derived materials during pyrolysis were characterized via TG-MS, ATR-FTIR, XPS, XRD, and N2adsorption-desorption isotherms. The pore characteristics and surface areas of TiPCS-derived ceramic powders revealed that the titanium components in TiPCS inhibit and/or reduce the densification of the network structures at elevated temperatures. The network structure of TiPCS-derived, SiC-based membranes showed trends similar to those of TiPCS-derived ceramic powders. The membrane prepared at 750 °C featured reproducibility and attractive selectivities for the PV removal of water or methanol from liquid mixtures.
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影响因子：
4.5
作者：
S. Yajima;T. Iwai;T. Yamamura;K. Okamura;Y. Hasegawa
通讯作者：
S. Yajima;T. Iwai;T. Yamamura;K. Okamura;Y. Hasegawa
影响因子：
8.6
作者：
Norihiro Moriyama;Hiroki Nagasawa;M. Kanezashi;T. Tsuru
通讯作者：
Norihiro Moriyama;Hiroki Nagasawa;M. Kanezashi;T. Tsuru
影响因子：
4.5
作者：
T. Yamamura;T. Ishikawa;M. Shibuya;T. Hisayuki;K. Okamura
通讯作者：
T. Yamamura;T. Ishikawa;M. Shibuya;T. Hisayuki;K. Okamura
用于分离甲醇-乙酸甲酯混合物的纳米金刚石改性聚酰胺蒸发膜
影响因子：
1.4
作者：
N. Avagimova;A. Toikka;G. Polotskaya
通讯作者：
G. Polotskaya
甲醇-乙酸甲酯二元混合物的全蒸发
DOI：
10.1016/s0255-2701(97)00058-5
发表时间：
1998
期刊：
Chemical Engineering and Processing
影响因子：
--
作者：
S. Šain;S. Dinçer;Ö.T Savaşçyı
通讯作者：
Ö.T Savaşçyı