Comparison of Two Methods of Methyl Group Grafting to the Silica Thin Film Surface and Its Tribological Properties Measured by Atomic Force Microscopy

Two different methods are used to modify silica surfaces and the results of the different modification methods on the frictional properties are presented in this paper. Methyl groups were introduced to the silica film directly during the synthesis step with the use of triethoxymethylsilane or by pos...

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Bibliographic Details
Published in:Tribology letters 2004-04, Vol.16 (3), p.181-185
Main Authors: Grobelny, J.P., Celichowski, G., Cichomski, M., Kulik, A.J., Piwoński, I.J., Plaza, S.
Format: Article
Language:English
Subjects:
Atomic force microscopy
Elasticity
Grafting
Mechanical properties
Microscopy
Silicon dioxide
Synthesis
Thin films
Tribology
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Summary:Two different methods are used to modify silica surfaces and the results of the different modification methods on the frictional properties are presented in this paper. Methyl groups were introduced to the silica film directly during the synthesis step with the use of triethoxymethylsilane or by post-synthesis grafting from solution using trimethylchlorosilane. Atomic Force Microscopy (AFM) was used to compare the frictional behaviour of samples after modifiying the silica surface using the two methods. It was found, that depending on the presence of methyl groups on the surface or in bulk, the frictional properties are strongly influenced not only by methyl groups but also by elasticity of final material.
ISSN:1023-8883
1573-2711
DOI:10.1023/B:TRIL.0000009728.77465.2b