Friction Reduction at a Superhydrophilic Surface: Role of Ordered Water
Friction Reduction at a Superhydrophilic Surface: Role of Ordered Water
复制标题
超亲水表面的摩擦减少：有序水的作用
DOI：
10.1021/acs.jpcc.5b02024
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发表时间：
2015-05
期刊：
影响因子：
--
通讯作者：
方海平
中科院分区：
文献类型：
--
作者：
王春雷;闻炳海;涂育松;万荣正;方海平
生物医学和工程领域迫切需要低摩擦的超亲水材料，因为它们的无污染和生物相容性，特别是当表面肯定是超亲水的时候，例如金属或二氧化钛作为血管内支架的表面涂层。然而，一般情况下，超亲水表面的摩擦系数高于疏水表面。在分子动力学模拟的基础上，我们发现具有合适电荷模式的超亲水表面的摩擦力明显减小，与水滴接触角为∼44°的疏水性表面的摩擦力相当。这种还原归因于超亲水表面存在具有合适电荷模式的有序水单分子膜，并且这种有序水单分子膜与上面的水分子之间的摩擦很小。
Low-friction but superhydrophilic materials are urgently needed in biomedical and engineering fields because of their nonfouling property and biocompatibility, particularly when the surfaces are definitely superhydrophilic, such as metal or TiO2 as the surface coatings of the intravascular stents. However, generally, there is a higher friction coefficient on the superhydrophilic surfaces than on the hydrophobic surfaces. On the basis of molecular dynamics simulations, we show that the friction on the superhydrophilic surface with appropriate charge patterns is evidently reduced, where the lower friction is similar to that of a rather hydrophobic surface with a contact angle of water droplet of ∼44°. This reduction is attributed to the existence of an ordered water monolayer on the superhydrophilic surface with appropriate charge patterns, and the friction between this ordered water monolayer and the water molecules above is small.
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影响因子：
41.2
作者：
Rafiee, Javad;Mi, Xi;Koratkar, Nikhil A.
通讯作者：
Koratkar, Nikhil A.
DOI：
10.1021/jz500761s
发表时间：
2014-06
期刊：
The journal of physical chemistry letters
影响因子：
--
作者：
L. Vuković;E. Vokac;P. Král
通讯作者：
L. Vuković;E. Vokac;P. Král
影响因子：
6.7
作者：
Chang Q. Sun
通讯作者：
Chang Q. Sun
影响因子：
56.9
作者：
Holt, JK;Park, HG;Bakajin, O
通讯作者：
Bakajin, O
影响因子：
29.4
作者：
Chen, Shengfu;Jiang, Shaoyi
通讯作者：
Jiang, Shaoyi