First generation polymer ionic membranes

Systems based on the simple combination of high molecular weight polymer hosts (e.g. poly(ethylene oxide), PEO) and lithium salts (LiX), which may be classified as first generation polymer ionic membranes ... 

Figure 6.17 Conductivity trends of various types of polymer ionic membranes, such as the PEO-LiX complex (first generation), the MEEP-LiX complex and the PUE-LiX complex (second generation), and the PAN-PC-EC-LiX system (third generation).

In many biological systems the biological membrane is a type of surface on which hydrophilic molecules can be attached. Then a microenvironment is created in which the ionic composition can be tuned in a controlled way. Such a fluffy polymer layer is sometimes called a slimy layer. Here we report on the first attempt to generate a realistic slimy layer around the bilayer. This is done by grafting a polyelectrolyte chain on the end of a PC lipid molecule. When doing so, it was found that the density in which one can pack such a polyelectrolyte layer depends on the size of the hydrophobic anchor. For this reason, we used stearoyl Ci8 tails. The results of such a calculation are given in Figure 26. 

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