Investigation of a new cyclotriphosphazene-terminated perfluoropolyether lubricant. Properties and interactions with a carbon surface
Investigation of a new cyclotriphosphazene-terminated perfluoropolyether lubricant. Properties and interactions with a carbon surface
复制标题
新型环三磷腈封端的全氟聚醚润滑剂的研究。
DOI：
10.1021/cm021048
复制
发表时间：
2003
影响因子：
8.6
通讯作者：
G. Tyndall
中科院分区：
文献类型：
--
作者：
R. Waltman;A. Pocker;H. Deng;N. Kobayashi;Y. Fujii;and T. Akada;K. Hirasawa;G. Tyndall
研究了一种新型的全氟聚醚(PFPE)结构，它的一端以羟基封端，另一端封端以环三磷腈衍生物封端。用接触角测角法、傅里叶变换红外光谱、X射线光电子能谱和成像椭圆偏振光谱仪研究了该材料的分子薄膜(A20H)与非晶态氮化碳表面之间的相互作用。结果表明，A20H单层膜中的环三磷腈和羟基端基均能与碳表面发生吸引作用。这些相互作用在吸附的膜中引起分层，表现为表面自由能与施加的A20H膜厚度的振荡依赖关系。由表面能第一极小值确定第一个A20H单分子膜的厚度，对于2400分子量材料为13.0±1.0A，对于3100分子量材料为15.0±1.0A。
A novel perfluoropolyether (PFPE) structure terminated on one chain end by a hydroxyl end group and on the other end by a cyclotriphosphazene derivative was studied. The interactions that developed at the interface between molecularly thin films of this material (A20H) and amorphous nitrogenated carbon surfaces were investigated using contact angle goniometry, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and imaging ellipsometry. The results demonstrate that both the cyclotriphosphazene and the hydroxyl end group of monolayer A20H films are capable of attractive interactions with the carbon surface. These interactions induce a layering in the adsorbed film that is manifested in an oscillatory dependence of the surface free energy on applied A20H film thickness. The thickness of the first A20H monolayer is determined from the first minimum in the surface energy to be 13.0 ± 1.0 A for the 2400 molecular weight material and 15.0 ± 1.0 A for the 3100 molecular weight material stu...