The present invention relates to a liquid-crystal (LC) display of the PS (polymer stabilised) or PSA (polymer sustained alignment) type, and to polymerisable compounds and LC media for use in PS (polymer stabilised) and PSA displays.
POLYMERIZABLE COMPOUNDS AND THEIR USE IN LIQUID-CRYSTAL DISPLAYS
申请人:Taugerbeck Andreas
公开号:US20120182516A1
公开(公告)日:2012-07-19
The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, and to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, especially in LC displays of the PS (“polymer sustained”) or PSA (“polymer sustained alignment”) type.
atmosphere. Under optimized conditions, a high yield of about 72% of NaBH4 could be obtained. Mechanistic study showed that all the hydrogen atoms from NaB(OH)4 remain in NaBH4 and no additional hydrogen sources are needed for the reduction process. The inexpensive Mg–Al alloy works as a reducing agent transforming the H+ to H− in NaBH4. This approach demonstrates a ∼20-fold cost reduction compared with
硼氢化钠(NaBH 4)的再生对于它通过水解过程提供氢能或通过直接硼氢化物燃料电池(DBFC)的阳极通过电子转移提供能量后形成一个闭合循环至关重要。在这两种情况下,乏燃料都是来自NaBO 2水溶液的NaB(OH)4。然而,当前的通过(NaB(OH)4)· x H 2 O通过还原反应和在高温下以金属氢化物作为还原剂煅烧形成NaBH 4的再生方法非常昂贵。在这项工作中,我们通过在氩气气氛下用Mg-Al合金作为NaB(OH)4的还原剂进行球磨。在优化的条件下,可以获得约72%的NaBH 4的高收率。机理研究表明,来自NaB(OH)4的所有氢原子均保留在NaBH 4中,并且还原过程不需要其他氢源。廉价的Mg-Al合金可以作为转化为H还原剂+至H -中的NaBH 4。与使用金属氢化物的方法相比,该方法的成本降低了约20倍。这为简单的球磨工艺的商业实施打开了大门,以再生用过的NaBH 4由NaB(OH)4制成,并带有廉价的还原剂。
Thermoanalytical and NMR investigation of NaBH4·2H2O thermolysis process
作者:I. V. Arkhangelskii、V. P. Tarasov、O. V. Kravchenko、G. Kirakosyan、M. V. Tsvetkov、M. V. Solovev、Yu. A. Dobrovolskii、A. V. Shihovzev
DOI:10.1007/s10973-017-6821-3
日期:2018.3
ΔHreact = 19 ± 2 kJ mol−1. When thermolysis proceeds in acetonitrile solution without a catalyst intermediate hydroxyborohydride NaBH3OH and/or Na(BH3)2OH is formed according to the NMR experiment data. The formation of similar complexes in the solid phase is confirmed by experiments on the oxidation of the thermolysis products. Thermolysis process with solid catalyst proceeds with an intense exothermic effect at
POLYMERIZABLE COMPOUNDS AND THE USE THEREOF IN LIQUID CRYSTAL DISPLAYS
申请人:Goetz Achim
公开号:US20120224124A1
公开(公告)日:2012-09-06
The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, and to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, especially in LC displays of the PS or PSA type (“polymer sustained” or “polymer sustained alignment” respectively).