Luminescent and UV-shielding ZnO quantum dots/carboxymethylcellulose sodium nanocomposite polymer films

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Abstract

Luminescent andUV-shielding bio-polymers have seldombeen reported. Zinc oxide quantum dots (ZnOQD) (~3.2 nm) was synthesized by a short-term sol-gel method. ZnOQD possessed a crystal lattice spacing of 0.28 nm and a hexagonal wurtzite structure. Luminescent and UV-shielding ZnOQD/carboxymethylcellulose sodium (CMC) nanocomposite polymer films were successfully fabricated by incorporating ZnOQD into a CMC matrix through a solution casting method. Thermal analysis demonstrated that the ZnOQD reduce the thermal decomposition rate of CMC, and a large number of ZnOQD can promote the catalytic degradation of ZnOQD/CMC nanocomposites. Furthermore, ZnOQD/CMC hybrid polymer films exhibited photoluminescence with maximum emission wavelength at 525 nm. More significantly, ZnOQD/CMC showed prominent UV-absorbing capability. Such ZnOQD/CMC nanocomposite polymer films are promising in UV-shielding and optical applications.

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Li, T., Li, B., Ji, Y., & Wang, L. (2018). Luminescent and UV-shielding ZnO quantum dots/carboxymethylcellulose sodium nanocomposite polymer films. Polymers, 10(10). https://doi.org/10.3390/polym10101112

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