Abstract
The poly(vinyl acetate) (PVAc)/zinc oxide (ZnO) microcapsule and PVAc/titanium dioxide (TiO2) microcapsule were synthesized via in-situ emulsion polymerization method. The PVAc/ZnO microcapsule and PVAc/TiO2 microcapsule were characterized by fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis(TG), transmission electron microscopy (TEM), and UV-visible spectroscopy (UV-vis). Effect of PVAc/ZnO microcapsule and PVAc/TiO2 microcapsule on properties of poly(lactic acid) (PLA) was evaluated by UV-vis, SEM and mechanical properties test. The results showed that the addition of PVAc/ZnO and PVAc/TiO2 microcapsules as a UV-blocking additive could significantly enhance UV-blocking property of PLA/PVAc/ZnO microcapsule composites and PLA/PVAc/TiO2 microcapsule composites compared with pure PLA, PLA/ZnO composites and PLA/TiO2 composites. The mechanical properties of PLA/PVAc/ZnO microcapsule composites were better than those of PLA/ZnO composites due to good dispersability and compatibility of PVAc/ZnO microcapsule in PLA matrix. Also, the mechanical properties of PLA/PVAc/TiO2 microcapsule composites were better than those of pure PLA and PLA/TiO2 composites. This study demonstrates the great potentials of the intrinsically UV shield additive PVAc/ZnO and PVAc/TiO2 microcapsules in the application of high performance matrix resin and composite material.
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30 January 2020
The above article from the journal of Fibers and Polymers has been retracted by agreement by all the authors, the journal editor-in-chief Won Ho Jo, and Springer Nature.
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The authors have retracted this article because they were unable to reproduce the experimental results in a follow-up study. Therefore, the authors have concluded that there is a fundamental error that has made this study irreproducible. All authors agree to this retraction.
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Zhang, B., Han, J. RETRACTED ARTICLE: Preparation and UV-protective property of PVAc/ZnO and PVAc/TiO2 microcapsules/poly(lactic acid) nanocomposites. Fibers Polym 17, 1849–1857 (2016). https://doi.org/10.1007/s12221-016-6679-1
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DOI: https://doi.org/10.1007/s12221-016-6679-1