Liu Guangming
Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics , University of Science and Technology of China , Hefei , P. R. China 230026.
Langmuir. 2019 Mar 5;35(9):3232-3247. doi: 10.1021/acs.langmuir.8b01158. Epub 2018 Jun 12.
In conventional theories, where ions are treated as point charges, the properties of charged polymers can be tuned using ions via the ionic strength. However, this article will show that the properties of charged polymers at the solid/liquid interface, including charged polymer brushes and polyelectrolyte multilayers, can be tuned by ions beyond ionic strength effects. Ion specificity, multivalency, ionic hydrogen bonding, and ionic hydrophobicity/hydrophilicity are used to tune a range of properties of charged polymers at the solid/liquid interface such as hydration, conformation, stiffness, surface wettability, lubricity, adhesion, and protein adsorption. The ionic effects demonstrated here greatly broaden our understanding of the use of ions to tune the interfacial properties of charged polymers. It is anticipated that these ionic effects can be further expanded by incorporating new types of important ion-charged polymer interactions and can also be extended to neutral polymer systems.
在传统理论中，离子被视为点电荷，带电聚合物的性质可通过离子强度利用离子进行调节。然而，本文将表明，在固/液界面处带电聚合物的性质，包括带电聚合物刷和聚电解质多层膜，可通过离子进行调节，且这种调节超出了离子强度效应的范畴。离子特异性、多价性、离子氢键以及离子疏水性/亲水性被用于调节固/液界面处带电聚合物的一系列性质，如水合作用、构象、刚度、表面润湿性、润滑性、粘附性和蛋白质吸附。此处展示的离子效应极大地拓宽了我们对利用离子调节带电聚合物界面性质的理解。预计通过纳入新型重要的离子 - 带电聚合物相互作用，这些离子效应能够进一步扩展，并且还可延伸至中性聚合物体系。
