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Insights into Interfacial Water Structuring at the Nafion Surface by T1-Weighted Magnetic Resonance Imaging.
Langmuir ( IF 3.7 ) Pub Date : 2020-01-07 , DOI: 10.1021/acs.langmuir.9b03435 Giulia Spatola 1 , Alessandra Viale 1 , Elisa Brussolo 2 , Rita Binetti 2 , Silvio Aime 1
Langmuir ( IF 3.7 ) Pub Date : 2020-01-07 , DOI: 10.1021/acs.langmuir.9b03435 Giulia Spatola 1 , Alessandra Viale 1 , Elisa Brussolo 2 , Rita Binetti 2 , Silvio Aime 1
Affiliation
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T1-weighted magnetic resonance images of water in the surroundings of a Nafion surface allowed the identification of the presence of a low-mobility zone (LMZ), 60 μm thick, consisting of water molecules structured in a hydrogen-bonding network, promoted by the presence of the acidic protons on the surface of the sulphonated polymer. In parallel, the exclusion zone (EZ) was assessed by observing in optical microscopy the distribution of microspheres suspended in the medium in contact with the Nafion membrane. It was found that the LMZ and the EZ do not correspond: in fact, the former is thinner and more stable over time than the latter and they behave differently when ions are present in the medium in which Nafion is immersed.
中文翻译：
通过T1加权磁共振成像了解Nafion表面的界面水结构。
在Nafion表面周围的水的T1加权磁共振图像可以鉴定出60μm的低迁移率区域（LMZ）的存在，该低迁移率区域由氢键网络中结构化的水分子组成，该分子由氢键促进。磺化聚合物表面上存在酸性质子。平行地，通过在光学显微镜下观察悬浮在与Nafion膜接触的介质中的微球的分布来评估禁区（EZ）。已发现LMZ和EZ不对应：实际上，前者比后者更薄且随时间推移更稳定，并且当离子浸入Nafion所浸入的介质中时，它们的行为不同。
更新日期：2020-01-07
中文翻译：
通过T1加权磁共振成像了解Nafion表面的界面水结构。
在Nafion表面周围的水的T1加权磁共振图像可以鉴定出60μm的低迁移率区域（LMZ）的存在，该低迁移率区域由氢键网络中结构化的水分子组成，该分子由氢键促进。磺化聚合物表面上存在酸性质子。平行地，通过在光学显微镜下观察悬浮在与Nafion膜接触的介质中的微球的分布来评估禁区（EZ）。已发现LMZ和EZ不对应：实际上，前者比后者更薄且随时间推移更稳定，并且当离子浸入Nafion所浸入的介质中时，它们的行为不同。
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