Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 8, Pages 3026-3032Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am200532j
Keywords
biomimetics; dopamine; clay; nanocomposite; interface
Funding
- Science and Engineering Research Council of the Agency for Science, Technology and Research (A*STAR) Singapore [092 137 0014]
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A facile biomimetic method was developed to enhance the interfacial interaction in polymer-layered silicate nanocomposites. By mimicking mussel adhesive proteins, a monolayer of polydopamine was constructed on clay surface by a controllable coating method. The modified clay (D-clay) was incorporated into an epoxy resin, it is found that the strong interfacial interactions brought by the polydopamine benefits not only the dispersion of the D-clay in the epoxy but also the effective interfacial stress transfer, leading to greatly improved thermomechanical properties at very low inorganic loadings. Rheological and infrared spectroscopic studies show that the interfacial interactions between the D-clay and epoxy are dominated by the hydrogen bonds between the catechol-enriched polydopamine and the epoxy.
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