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Electrophoretic deposition of waterborne ultraviolet (UV)-curable coatings based on microgels

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Abstract

Microgels are novel functional polymers with an intramolecular crosslinked structure that can significantly improve the mechanical properties of coatings. We demonstrate herein for the first time successful fabrication of microgels based on branched poly(ethylenimine) (PEI) and their incorporation into water-soluble polyacrylate (WPA), with subsequent preparation of compact coatings via electrophoretic deposition (EPD) and ultraviolet (UV) radiation. The films including the microgels exhibited tensile strength and elongation at breakage values above 6.82 MPa and 72.09%, respectively. The coatings showed good thermal stability, decreased water absorption, outstanding durability, and rust resistance after immersion in 5 wt% NaCl solution for 7 days at 40°C. This work provides a new strategy that can be readily applied to a variety of conductive substrates.

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Acknowledgments

This work was financially supported by the Natural Science Foundation of Guangdong Province (Grant Nos. 2018A030313483, 2018A030313235 and 2018A030310349), Foundation for High-Level Talents in Qiannan Normal University for Nationalities (qnsyrc201706), Guangzhou City Science and Technology Program (201803030003), and Research Fund Program of Guangdong Provincial Key Lab of Green Chemical Product Technology (GC201813).

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Correspondence to Weiping Tu or Kaimei Peng.

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Chen, J., Yuan, T., Tu, W. et al. Electrophoretic deposition of waterborne ultraviolet (UV)-curable coatings based on microgels. J Coat Technol Res 16, 1367–1378 (2019). https://doi.org/10.1007/s11998-019-00219-0

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