کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1429557 987176 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The importance of orientation in proton transport of a polymer film based on an oriented self-organized columnar liquid-crystalline polyether
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
The importance of orientation in proton transport of a polymer film based on an oriented self-organized columnar liquid-crystalline polyether
چکیده انگلیسی

We prepared membranes based on a liquid-crystalline side-chain polyether obtained by chemical modification of commercial poly(epichlorohydrin) (PECH) with dendrons. This polymer exhibited a columnar structure, which could form an ion channel in the inner part. The columns were successfully oriented by taking advantage of surface interactions between the polymer and hydrophilic substrates, as confirmed by X-ray diffraction analysis (XRD), environmental scanning electron microscopy (ESEM) and optical microscopy between crossed polars (POM). Column orientation was found to be crucial for effective transport: the oriented membranes exhibited proton transport comparable to that of Nafion® N117 and no water uptake. An increase in sodium ion concentration in the feed phase suggested a proton/cation antiport. On the contrary, no proton transport was detected on unoriented membranes based on the same liquid-crystalline side-chain polyether or on unmodified PECH.


► We prepared oriented membranes based on a liquid crystalline columnar polyether.
► In this structure, the inner polyether chain could work as an ion channel.
► We obtained membranes by casting a chloroform solution in the presence of water.
► Membranes showed good proton permeability due to the presence of oriented channels.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: C - Volume 32, Issue 2, 1 March 2012, Pages 105–111
نویسندگان
, , , , , ,