Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 526, Issue 1-2, Pages 74-78Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2009.07.023
Keywords
Silane treatment; MMT; Nanocomposites; Mechanical interfacial properties
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In this study, montmorillonite (MMT) was modified using silane coupling agents (SCAs) to improve its interfacial adhesion to an epoxy matrix. The effects of the SCAs on the mechanical interfacial properties of MMT/epoxy nanocomposites were investigated by FT-IR, XRD, and TEM and with reference to the surface energetics. In the results, the SCAs led to an improvement of the organic functional groups, including the silanol and siloxane groups, on the MMT surfaces. This surface modification also led to an enhancement of the specific component of the surface free energy of the MMT Regarding the mechanical interfacial properties, the critical stress intensity factor (K(IC)) and interlaminar shear stress (ILSS) values for all of the treated MMT/epoxy composites were enhanced: those of the gamma-amino propyl triethoxy silane (APS)-treated MMT/epoxy composite showed the highest values of 3.55 MPa m(1/2) and 13.8 MPa, respectively. (C) 2009 Elsevier B.V. All rights reserved.
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