Microcapsules with controllable shell has found vast applications in coatings and in this paper the preparation of microcapsules templated from O/W Pickering emulsions by UV initiated polymerization and their effects on the shell properties of microcapsules were investigated，in terms of initial emulsifier particle loading，nanoparticle size and photo-sensitive oligomer PUA，etc. When the microcapsules was incorporated in the coatings，the effect of it，as fillers，on the basic properties of the coatings was also investigated. The structure of microcapsules was characterized by use of FT-IR，SEM，microscope，and TG analyzer. The performance of coatings film was also tested. The results showed that on the surface of the hollow microspheres prepared by emulsifier SiO2-E nanoparticles pre-dispersed in the oil phase，it was found blocked with SiO2-E nanoparticles. The increase in the particle size of the emulsifier nanoparticles affected the morphology of the hollow microspheres，but no effect on the size. When the content of PUA was increased from 10% to 30%，the number of nanoparticles distributed on the surface of the hollow microspheres decreased，the elongation at break increased from 11. 1% to 34. 5%，and the tensile stress decreased from 21. 5 MPa down to 12. 1 MPa. As the content of hollow microcapsules increased，the pencil hardness of the coatings increased with good adhesion.
CHEN Lin-Lin
,
FAN Meng-Yu
,
LIU Ren
,
SUN Guan-Qing
. Hollow Microcapsules with Composite Shell Prepared from Pickering Emulsion Templates and Their Application in Coatings[J]. Paint & Coatings Industry, 2020
, 50(8)
: 8
-14
.
DOI: 10.12020/j.issn.0253-4312.2020.8.8
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