Composites Based on Polytetrafluoroethylene and Detonation Nanodiamonds: Filler–Matrix Chemical Interaction and Its Effect on a Composite’s Properties
- 作者: Koshcheev A.1, Perov A.1, Gorokhov P.1, Zaripov N.1, Tereshenkov A.1, Khatipov S.1
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隶属关系:
- Karpov Physicochemical Research Institute
- 期: 卷 92, 编号 6 (2018)
- 页面: 1145-1152
- 栏目: To the 100Th Anniversary of the Karpov Institute of Physical Chemistry
- URL: https://journals.rcsi.science/0036-0244/article/view/170029
- DOI: https://doi.org/10.1134/S0036024418060080
- ID: 170029
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详细
Specific properties of PTFE composites filled with ultradisperse detonation diamonds (UDDs) with different surface chemistries are studied. It is found for the first time that filler in the form of UDDs affects not only the rate of PTFE thermal decomposition in vacuum pyrolysis, but also the chemical composition of the products of degradation. The wear resistance of UDD/PTFE composites is shown to depend strongly on the UDD surface chemistry. The presence of UDDs in a PTFE composite is found to result in perfluorocarbon telomeres, released as a readily condensable fraction upon composite pyrolysis. The chemical interaction between PTFE and UDDs, characterized by an increase in the rate of gas evolution and a change in the desorbed gas’s composition, is found to occur at temperature as low as 380°C. It is shown that the intensity of this interaction depends on the concentration of oxygen-containing surface groups, the efficiency of UDDs in terms of the composite’s wear resistance being reduced due to the presence of these groups. Based on the experimental data, a conclusion is reached about the chemical interaction between UDDs and a PTFE matrix, its dependence on the nanodiamond surface chemistry, and its effect on a composite’s tribology.
作者简介
A. Koshcheev
Karpov Physicochemical Research Institute
编辑信件的主要联系方式.
Email: koscheev@nifhi.ru
俄罗斯联邦, Moscow, 105064
A. Perov
Karpov Physicochemical Research Institute
Email: koscheev@nifhi.ru
俄罗斯联邦, Moscow, 105064
P. Gorokhov
Karpov Physicochemical Research Institute
Email: koscheev@nifhi.ru
俄罗斯联邦, Moscow, 105064
N. Zaripov
Karpov Physicochemical Research Institute
Email: koscheev@nifhi.ru
俄罗斯联邦, Moscow, 105064
A. Tereshenkov
Karpov Physicochemical Research Institute
Email: koscheev@nifhi.ru
俄罗斯联邦, Moscow, 105064
S. Khatipov
Karpov Physicochemical Research Institute
Email: koscheev@nifhi.ru
俄罗斯联邦, Moscow, 105064