, Volume 30, Issue 5, pp 652-663
Date: 11 Mar 2012

Synthesis and characterization of functionalized carbon black/poly(vinyl alcohol) high refractive index nanocomposites

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Abstract

Carbon black (CB)/polymer composites with high refractive index (RI) were fabricated from poly(vinyl alcohol) (PVA) and covalently functionalized nano-CB (PVA-es-CB) by simple esterification reaction. Transmission electron microscopy showed that uniform aggregates of PVA-es-CB nanoparticles with a size smaller than 100 nm formed in the nanocomposite films. Ellipsometric measurements indicated that the PVA-es-CB/PVA composite films had a RI in the range 1.520–1.598 linearly increased with the PVA-es-CB volume content. Theoretical equation based on Lorentz-Lorenz theory provided reasonably close estimation of the refractive indices to the experimentally observed values. The hybrid films also revealed relatively good surface planarity, thermal stability and optical transparency.

This work was financially supported by the National Natural Science Foundation of China (No. 50733001), Natural Science Foundation of Shanghai (No. 11ZR1409500) and Shanghai Key Laboratory Project (No. 08DZ2230500).