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Nanoclay-reinforced Polyacrylamide Composite: Synthesis, Structural and Mechanical Characterization

Published online by Cambridge University Press:  31 January 2011

Yong Sun ,
Zaiwang Huang  and
Xiaodong Li
Yong Sun
Affiliation:
[email protected], University of South Carolina, Mechanical Engineering, Columbia, South Carolina, United States
Zaiwang Huang
Affiliation:
[email protected], University of South Carolina, Mechanical Engineering, Columbia, South Carolina, United States
Xiaodong Li
Affiliation:
[email protected], University of South Carolina, Mechanical Engineering, Columbia, South Carolina, United States
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Abstract

A facile electrophoretic deposition method was successfully applied to achieve novel nanoclay-reinforced polyacrylamide nanocomposite thin films. A special curled architecture of the re-aggregated nanoclay-platelets was identified, providing a possible source for realizing the interlocking mechanism in the nanocomposites. The curled architecture could be the result from strain releasing when the thin films were peeled off from the substrates. Through micro-/nano-indentation and in situ observation of the deformation during tensile test with an atomic force microscope (AFM), the localized deformation mechanism of the synthesized materials was investigated in further details. The results implied that a localized crack diversion mechanism worked in the synthesized nanocomposite thin films, which resembled its nature counterpart-nacre. The deformation behavior and fracture mechanism were discussed with reference to lamellar structure, interfacial strength between the nanoclays and the polyacrylamide matrix, and nanoclay agglomeration.

Keywords

nanostructureelectrodepositionbiomimetic (assembly)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1239: Symposium VV – Micro- and Nanoscale Processing of Biomaterials , 2009 , 1239-VV06-01
Copyright
Copyright © Materials Research Society 2010

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