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Effect of the Self-Assembled Structures of Hydrated Polyzwitterionic and Polyanionic Brushes on Their Self-Cleaning Capabilities
作者:Y.-L. Zhu, Z.-Y. Lu, Z.-W. Li, Z.-Y. Sun, X.-K. Liu
關(guān)鍵字:Polyzwitterionic
論文來源:期刊
具體來源:Langmuir 2019, 35, 20, 6669-6675
發(fā)表時間:2019年

The capability of polyelectrolyte brushes to spontaneously clean oil fouling via water is determined by factors including water wettability and the self-assembled structures of hydrated polyelectrolytes. Although the charged groups of polyelectrolytes provide the original source of water wettability, the self-assembled structures play a significant role on the self-cleaning performances. Here, we employ coarse-grained molecular dynamics simulations to study the general self-cleaning characteristics of two types of surface-grafted polyelectrolyte brushes (i.e. zwitterionic and anionic polyelectrolytes). It has been found that, the high grafting density is favorable to fouling reducing for both polyzwitterions and polyanions. To be specific, the hydrated polyzwitterions form intermolecular cross-linked network via zwitterionic complexes, resulting in better self-cleaning capabilities than the polyanions at lower grafting densities. However, polyanions form bundles with each consisting of several chains via hydrophobic interactions and electrostatic repulsions presenting better self-cleaning performances than the polyzwitterions at higher grafting densities.

Zhu, You-Liang, Zhong-Yuan Lu, Zhan-Wei Li, Zhao-Yan Sun, and Xiaokong Liu. "Effect of the Self-Assembled Structures of Hydrated Polyzwitterionic and Polyanionic Brushes on Their Self-Cleaning Capabilities." Langmuir 35, no. 20 (May 21 2019): 6669-75. http://dx.doi.org/10.1021/acs.langmuir.9b00714.

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