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  • Polypyrrole (PPy) is one of the most studied conducting polymers. This is because it can be easily prepared and it has good mechanical properties, chemical resistance and high electrical conductivity. During PPy synthesis the anions of the basic electrolyte are inserted into the polymer structure. Subsequent polarization leads to ionic exchange between the solution and polymer. Mechanism of this transport is not clear yet. Widely accepted theory exists, that anions are preferably inserted/expelled during subsequent polarization. Only in the case of the large anions fixed sterically in the film structure the cations are forced to move instead. The aim of our study is to have a closer look on this problem and possibly to determine the real fraction of the anions and cations which participating on an ionic exchange between polymer matrix and electrolyte.Electrochemical Quartz Crystal Nanobalance (EQCN) has been choosen to accomplish this task. The reason is high sensitivity and fast response of this tech
  • Polypyrrole (PPy) is one of the most studied conducting polymers. This is because it can be easily prepared and it has good mechanical properties, chemical resistance and high electrical conductivity. During PPy synthesis the anions of the basic electrolyte are inserted into the polymer structure. Subsequent polarization leads to ionic exchange between the solution and polymer. Mechanism of this transport is not clear yet. Widely accepted theory exists, that anions are preferably inserted/expelled during subsequent polarization. Only in the case of the large anions fixed sterically in the film structure the cations are forced to move instead. The aim of our study is to have a closer look on this problem and possibly to determine the real fraction of the anions and cations which participating on an ionic exchange between polymer matrix and electrolyte.Electrochemical Quartz Crystal Nanobalance (EQCN) has been choosen to accomplish this task. The reason is high sensitivity and fast response of this tech (en)
  • PPy je jedním z nejstudovanějších vodivých polymerů. To je dáno jeho jednoduchou přípravou, dobrými mechanickými vlastnostmi, chemickou odolností a vysokou eletrickou vodivostí. Během syntézy PPy jsou anionty základního elektrolytu zabudovávány do jeho struktury. Pří následné polarizaci dochází k výměně iontů mezi filmem vodivého polymeru a roztokem. Mechanismus iontové výměny nebyl doposud zcela objasněn. Všeobecně je přijímána jedna teorie, podle které jsou v průběhu polarizace mezi filmem a elektrolytem přednostně vyměňovány anionty. Pouze v případě velikých aniontů, které jsou vzhledem ke svým rozměrům ve filmu fixovány a jsou zcela nepohyblivé, je iontová výměna zajišťována kationty. Cílem této práce bylo studovat podrobněji iontovou výměnu a určit podíl aniontů a kationtů podílejících se na přenosu náboje mezi polymerem a elektrolytem. Při studiu byly využity elektrochemické křemenné krystalové nanováhy, které umožňují s vysokou citlivostí sledovat hmotnostní změny filmu během polarizace. Aby se (cs)
Title
  • Poster:A study of potentiodynamically controlled ionic exchange in the polypyrrole film (1)
  • Poster:A study of potentiodynamically controlled ionic exchange in the polypyrrole film (1) (en)
  • Poster: Potenciálově modulovaná výměna iontů v polypyrrolovém filmu (1) (cs)
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  • Poster:A study of potentiodynamically controlled ionic exchange in the polypyrrole film (1)
  • Poster:A study of potentiodynamically controlled ionic exchange in the polypyrrole film (1) (en)
  • Poster: Potenciálově modulovaná výměna iontů v polypyrrolovém filmu (1) (cs)
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  • RIV/60461373:22310/05:00013990!RIV06-GA0-22310___
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  • P(GA203/05/0080)
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  • RIV/60461373:22310/05:00013990
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  • polypyrrole; conducting polymers; ionic exchange; EQCN (en)
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  • [C8B57DF9E81C]
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  • Bouzek, Karel
  • Bystroň, Tomáš
  • Holzhauser, Petr
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  • 22310
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