Nanoporous organic polymer/cage composite membranes.
Nanoporous organic polymer/cage composite membranes.
复制标题
DOI：
10.1002/anie.201206339
复制
发表时间：
2013-01-21
影响因子：
16.6
通讯作者：
Jansen, Johannes C.
中科院分区：
文献类型：
--
作者：
Bushell, Alexandra F.;Budd, Peter M.;Attfield, Martin P.;Jones, James T. A.;Hasell, Tom;Cooper, Andrew I.;Bernardo, Paola;Bazzarelli, Fabio;Clarizia, Gabriele;Jansen, Johannes C.
迫切需要开发有效且经济的CO2净化技术，以将废CO2提升到可重复使用的纯度。基于膜的分离过程被视为解决这一问题的可能方案之一。[1]对于大体积的膜应用，如CO2回收，高渗透性是必要的，以尽量减少膜面积，结合良好的选择性。对于膜应用，高自由体积聚合物[2]表现出良好的可加工性，但它们易于物理老化。由于运输取决于自由体积，物理老化导致渗透性随时间推移而损失。[3]多孔结晶固体可以提供良好的传输性能，但不太容易制造成机械稳定的膜。聚合物与无机或金属-有机颗粒在复合或混合基质膜（MMM）[4]中的组合可以在性能上给予协同增强，但是在膜内实现良好分散方面遇到困难。[5]几乎未开发的是纯有机分散相的潜力，其仅包含C、H、N和O原子，其应显示出与连续聚合物基质的更好相容性，并且其提供通过有机合成来定制物理性质的范围。在这里，我们展示了一种新的路线MMM中，分散相是由一个单一的均匀的，分子溶液中的多孔有机笼分子原位结晶产生的。将多孔有机笼显着提高渗透性，而化学还原，无孔笼分子具有相反的effect.We还比较了气体分离性能的膜，其中晶体产生的原位结晶对膜预先形成的纳米晶体分散通过共铸与聚合物。可结晶前体是CC 3（图1a），其具有有效直径约为三角形的窗口
There is an urgent need to develop efficient and economic CO2 purification technologies to upgrade waste CO2 to a reusable purity. Membrane-based separation processes are seen as one of the possible solutions to this problem.[1] For large-volume membrane applications, such as CO2 recovery, high permeability is essential to minimize the membrane area, in combination with good selectivity. For membrane applications, high free-volume polymers [2] exhibit good processability, but they are prone to physical ageing. As transport depends on free volume, physical ageing leads to loss of permeability over time.[3] Porous crystalline solids can give good transport properties, but are less easily fabricated into mechanically stable membranes. Combinations of polymers with inorganic or metal–organic particles in composite or mixed-matrix membranes (MMMs)[4] may give synergistic enhancements in performance, but difficulties are encountered in achieving good dispersion within the membrane.[5] Largely unexplored is the potential of purely organic dispersed phases, comprising only C, H, N, and O atoms, which should show better compatibility with a continuous polymeric matrix and which offer scope for tailoring the physical properties through organic synthesis. Herein we demonstrate a novel route to MMMs in which the dispersed phase is generated by in situ crystallization of porous organic cage molecules from a single homogeneous, molecular solution. The incorporation of porous organic cages significantly enhances permeability, whereas chemically reduced, nonporous cage molecules have an opposite effect.We also compare the gas separation performance of membranes where crystals were generated by in situ crystallization against membranes where pre-formed nanocrystals were dispersed by co-casting with the polymer. The crystallizable precursor is CC3 (Figure 1 a), which has approximately triangular windows of effective diameter
登录
查看更多内容
影响因子：
41.2
作者：
Tozawa, Tomokazu;Jones, James T. A.;Cooper, Andrew I.
通讯作者：
Cooper, Andrew I.
影响因子：
9.5
作者：
Robeson, Lloyd M.
通讯作者：
Robeson, Lloyd M.
影响因子：
64.8
作者：
Jones, James T. A.;Hasell, Tom;Cooper, Andrew I.
通讯作者：
Cooper, Andrew I.
影响因子：
3.1
作者：
Tian, Jian;Thallapally, Praveen K.;McGrail, B. Peter
通讯作者：
McGrail, B. Peter
影响因子：
9.5
作者：
Budd, Peter M.;McKeown, Neil B.;Shantarovich, Victor
通讯作者：
Shantarovich, Victor