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SEM photos of poly(ionic liquid)s (PIL) particles: (a) poly((p-vinylbenzyl trimethylammonium) (VBTMA)+CF3SO3); (b) poly(VBTMA+ (CF3SO2)2N−); and (c) poly((p-vinylbenzyltriethylammonium bis(trifluoromethane sulfonimide) (VBTEA)+ (CF3SO2)2N−), reprinted with permission from [102]. Copyright Elsevier, 2016.
