Analytical Chemistry - Biointerfaces , Ruhr-University Bochum , 44780 Bochum , Germany.
School of Natural and Environmental Sciences , Newcastle University , Newcastle upon Tyne NE1 7RU , United Kingdom.
ACS Appl Mater Interfaces. 2018 Oct 17;10(41):34965-34973. doi: 10.1021/acsami.8b12017. Epub 2018 Oct 5.
Dendritic polyglycerols (PGs) were grafted onto surfaces using a ring-opening polymerization reaction, and the fouling-release properties against marine organisms were determined. The coatings were characterized by spectroscopic ellipsometry, contact angle goniometry, ATR-FTIR, and stability tests in different aqueous media. A high resistance toward the attachment of different proteins was found. The PG coatings with three different thicknesses were tested in a laboratory assay against the diatom Navicula incerta and in a field assay using a rotating disk. Under static conditions, the PG coatings did not inhibit the initial attachment of diatoms, but up to 94% of attached diatoms could be removed from the coatings after exposure to a shear stress of 19 Pa. Fouling release was found to be enhanced if the coatings were sufficiently thick. The excellent fouling-release properties were supported in dynamic field-immersion experiments in which the samples were continually exposed to a shear stress of 0.18 Pa.
采用开环聚合反应将树枝状多聚甘油（PG）接枝到表面上，并测定其对海洋生物的抗污性能。通过光谱椭圆术、接触角测角法、ATR-FTIR 和不同水介质中的稳定性测试对涂层进行了表征。发现涂层具有很高的抗不同蛋白质附着的能力。在实验室测定中，用三种不同厚度的 PG 涂层对硅藻 Navicula incerta 进行了测试，并在使用旋转圆盘的现场测试中进行了测试。在静态条件下，PG 涂层不会抑制硅藻的初始附着，但在暴露于 19 Pa 的剪切应力后，高达 94%的附着硅藻可以从涂层上除去。如果涂层足够厚，则会发现防污释放性能得到增强。在动态现场浸渍实验中，样品不断暴露于 0.18 Pa 的剪切应力下，这也支持了优异的防污释放性能。
