Version 1
: Received: 20 June 2017 / Approved: 20 June 2017 / Online: 20 June 2017 (11:23:07 CEST)
How to cite:
Yuan, T.; Zhang, C.; Zhou, C.; Tu, W.; Hu, J.; Yang, Z. Fabrication of novel thermal-expandable microcapsules and their applications in intumescent flame-retardant water-based coatings. Preprints2017, 2017060096. https://doi.org/10.20944/preprints201706.0096.v1
Yuan, T.; Zhang, C.; Zhou, C.; Tu, W.; Hu, J.; Yang, Z. Fabrication of novel thermal-expandable microcapsules and their applications in intumescent flame-retardant water-based coatings. Preprints 2017, 2017060096. https://doi.org/10.20944/preprints201706.0096.v1
Yuan, T.; Zhang, C.; Zhou, C.; Tu, W.; Hu, J.; Yang, Z. Fabrication of novel thermal-expandable microcapsules and their applications in intumescent flame-retardant water-based coatings. Preprints2017, 2017060096. https://doi.org/10.20944/preprints201706.0096.v1
APA Style
Yuan, T., Zhang, C., Zhou, C., Tu, W., Hu, J., & Yang, Z. (2017). Fabrication of novel thermal-expandable microcapsules and their applications in intumescent flame-retardant water-based coatings. Preprints. https://doi.org/10.20944/preprints201706.0096.v1
Chicago/Turabian Style
Yuan, T., Jianqing Hu and Zhuohong Yang. 2017 "Fabrication of novel thermal-expandable microcapsules and their applications in intumescent flame-retardant water-based coatings" Preprints. https://doi.org/10.20944/preprints201706.0096.v1
Abstract
Thermal-expandable microcapsules (TEMs) for water-based coatings were synthesized with co-polymer of Acrylonitrile (AN) - Methyl methacrylate (MMA) - Ethylhexyl acrylate (EHA) - Divinylbenzene (DVB) as shell and toluene-p-sulfonyl hydrazide as core by suspension polymerization method. It was found that the microcapsules with desirable thermal expansion property and good heat stability could be obtained with a shell monomers composition of 70% AN /20% MMA /9% EHA /1% DVB. When 2% styrene-maleic acid copolymer (SMC) as emulsifier and 3% poly (vinyl pyrrolidone) (PVP) as dispersing agent were used, well defined spherical and more uniform microcapsules could be prepared. It was also found that when the shell/core mass ratio was 3:1, an encapsulation efficiency of ca. 94.5% could be achieved. Beyond this ratio, the increase of encapsulation efficiency reached a plateau. The 100 μm thickness film of water-based coating containing 5% microcapsules could be expanded to the thickness of 450 μm after exposed at 150 °C for 2 minutes. TG analysis revealed the mass loss start temperature of coating increased by more than 30 °C when 5% microcapsules were added to water-based coatings, which demonstrated the flame-retardant function of the coatings.
Chemistry and Materials Science, Surfaces, Coatings and Films
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
