New Synthetic Methods of Novel Nanoporous Polycondensates and Excellent Oxygen Permselectivity of Their Composite Membranes
New Synthetic Methods of Novel Nanoporous Polycondensates and Excellent Oxygen Permselectivity of Their Composite Membranes
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DOI：
10.3390/nano9060859
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发表时间：
2019-06
期刊：
影响因子：
5.3
通讯作者：
Y. Zang;T. Aoki;M. Teraguchi;T. Kaneko;Hongge Jia;Liqun Ma;Fengjuan Miao
中科院分区：
文献类型：
--
作者：
Y. Zang;T. Aoki;M. Teraguchi;T. Kaneko;Hongge Jia;Liqun Ma;Fengjuan Miao
以1/3螺旋顺-顺式聚苯基乙炔为原料，通过缩聚反应和高选择性光环芳构化反应，合成了两种新型的纳米孔缩聚物（sc（Rf））.通过原有的方法，首次合成了具有纳米孔或纳米空间的新的定义明确的片状聚合物。它们的复合膜含有少量（1.0wt%）sc（Rf），具有很好的氧渗透性（Po_2> 1000 barrer），并且它们的氧选择渗透性（α = Po_2/PN_2）对Po_2的曲线图超出了Robeson的上限线。仅添加少量（1.0 wt%）sc（Rf）可提高α和Po 2值。在基膜表面上合成的sc（Rf）之一表现出最好的性能，即，Po2 = 5300 barrer，α = 2.5。从接触角值来看，膜表面被sc（Rf）有效覆盖。据认为，在sc（Rf）分子内部和之间产生的纳米孔和纳米空间对α和Po 2/PN 2的增强起重要作用。
Two kinds of novel nanoporous polycondensates (sc(Rf)) have been synthesized by two new preparation methods consisting of polycondensation and highly selective photocyclicaromataization of 1/3 helical cis-cis polyphenylacetylenes with polymerizable groups. By the original methods, new well-defined sheet polymers having nanopores or nanospaces have been synthesized for the first time. Their composite membranes, containing small amounts (1.0 wt%) of sc(Rf), had ultrahigh oxygen permeability (Po2 > 1000 barrer), and their plots were beyond the Robeson’s upper bound line in the graph of oxygen permselectivity (α = Po2/PN2) versus Po2. Both α and Po2 values were enhanced by adding only small amounts (1.0 wt%) of sc(Rf). One of the sc(Rf)s synthesized on the base membrane surface showed the best performance, i.e., Po2 = 5300 barrer and α = 2.5. The membrane surface was effectively covered by sc(Rf), judging from the contact angle values. It is thought that nanopores and nanospaces created in and between sc(Rf) molecules played an important role for the enhancement of both α and Po2/PN2.