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Synthesis by plasma-enhanced chemical-vapor deposition and characterization of siliconlike films with hydrophobic functionalities for improved long-term geometric stability of fiber-reinforced polymers

Published online by Cambridge University Press:  31 January 2011

A. Cremona ,
E. Vassallo ,
A. Merlo ,
A. Srikantha Phani  and
L. Laguardia
A. Cremona*
Affiliation:
Istituto di Fisica del Plasma Consiglio Nazionale delle Ricerche (CNR), 20162 Milano, Italy
E. Vassallo
Affiliation:
Istituto di Fisica del Plasma Consiglio Nazionale delle Ricerche (CNR), 20162 Milano, Italy
A. Merlo
Affiliation:
Ce.S.I. Centro Studi Industriali-R&D and Advanced Engineering Department, 20133 Milano, Italy
A. Srikantha Phani
Affiliation:
Cambridge University, Engineering Department, Cambridge CB2 1TN, United Kingdom
L. Laguardia
Affiliation:
Istituto di Fisica del Plasma Consiglio Nazionale delle Ricerche (CNR), 20162 Milano, Italy
*
a)Address all correspondence to this author. e-mail: cremona@ifp.cnr.it
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Abstract

Amorphous siliconlike films with hydrophobic functionalities have been deposited by plasma-enhanced chemical-vapor deposition on carbon-fiber-reinforced polymer (CFRP) unidirectional laminates used for micromechanical applications where high strength-to-weight and high stiffness-to-weight ratios are required. To improve long-term geometrical stability in ultrahigh-precision machine structures, hydrophobic CFRP materials are desirable. Three layers have been grown with different plasma-process parameters from a mixture of hexamethyldisiloxane, O2, and Ar. Chemical composition, water contact angle, surface energy, morphology, and tribological properties have been evaluated to choose the one that best fulfills hydrophobicity, wear, and scratch resistance. Wear tests have also been carried out on CFRP laminates coated with a polyurethane layer to compare the wear performance of the above specimens with that of a conventional hydrophobic coating. Scanning electron microscope images show a very good adhesion of the films to the composite substrate because the failure of the film and of the substrate (such as fiber failure) take place simultaneously.

Keywords

CompositePlasma-enhanced CVD (PECVD) (deposition)Tribology
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 4 , April 2008 , pp. 1042 - 1050
Copyright
Copyright © Materials Research Society 2008

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References

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