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Open AccessArticle

New Synthetic Methods of Novel Nanoporous Polycondensates and Excellent Oxygen Permselectivity of Their Composite Membranes

1
Heilongjiang Province Key Laboratory of Polymeric Composition Material, College of Materials Science and Engineering, Qiqihar University, Wenhua Street 42, Qiqihar 161006, China
2
Faculty of Engineering, Niigata University, Ikarashi 2-8050, Nishi-ku, Niigata 950-2181, Japan
3
College of Communications and Electronics Engineering, Qiqihar University, Wenhua Street 42, Qiqihar 161006, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(6), 859; https://doi.org/10.3390/nano9060859
Received: 19 May 2019 / Revised: 30 May 2019 / Accepted: 31 May 2019 / Published: 5 June 2019
(This article belongs to the Special Issue Nanotechnologies and Nanomaterials: Selected Papers from CCMR 2019)
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. View Full-Text
Keywords: synthesis; high oxygen permselectivity; nanopore; nanospace; polyphenylacetylene; polycondensates; highly selective photocyclicaromataization (SCAT) synthesis; high oxygen permselectivity; nanopore; nanospace; polyphenylacetylene; polycondensates; highly selective photocyclicaromataization (SCAT)
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MDPI and ACS Style

Zang, Y.; Aoki, T.; Teraguchi, M.; Kaneko, T.; Jia, H.; Ma, L.; Miao, F. New Synthetic Methods of Novel Nanoporous Polycondensates and Excellent Oxygen Permselectivity of Their Composite Membranes. Nanomaterials 2019, 9, 859.

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