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Article

Highly Scattering Hierarchical Porous Polymer Microspheres with a High-Refractive Index Inorganic Surface for a Soft-Focus Effect

1
Department of Chemical Engineering, Myongji University, Yongin 17058, Korea
2
Cosmax R&I Center, Innovation Lab, Cosmax, Seongnam 13486, Korea
3
Department of Chemical Engineering, Soongsil University, Seoul 06978, Korea
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(10), 2418; https://doi.org/10.3390/polym12102418
Received: 29 September 2020 / Revised: 17 October 2020 / Accepted: 19 October 2020 / Published: 20 October 2020
(This article belongs to the Special Issue Hybrid Polymeric Materials II)
Functional light scattering materials have received considerable attention in various fields including cosmetics and optics. However, a conventional approach based on optically active inorganic materials requires considerable synthetic effort and complicated dispersion processes for special refractive materials. Here, we report a simple and effective fabrication strategy for highly scattering hierarchical porous polymer microspheres with a high-refractive index inorganic surface that mitigates the disadvantages of inorganic materials, producing organic-inorganic hybrid particles with an excellent soft-focus effect. Hierarchical organic-inorganic hybrid particles were synthesized using the simple physical mixing of porous poly (methyl methacrylate) (PMMA) microparticles with different pore sizes and regularities as the organic core and titanium dioxide (TiO2) nanoparticles with different particle sizes as the inorganic shell. The polar noncovalent interactions between polar PMMA microspheres and the polar surface of TiO2 nanoparticles could induce the hierarchical core-shell structure of hybrid particles. The synthesized hybrid particles had increased diffuse reflectance properties of up to 160% compared with single inorganic particles. In addition, the light scattering efficiency and soft-focus effect could be increased further, depending on the size of the TiO2 nanoparticles and the pore characteristics of the PMMA microspheres. The proposed study can provide a facile and versatile way to improve the light scattering performance for potential cosmetics. View Full-Text
Keywords: core-shell structure; diffuse reflectance; hybrid polymer particle; light scattering; soft-focus effect core-shell structure; diffuse reflectance; hybrid polymer particle; light scattering; soft-focus effect
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MDPI and ACS Style

Yoon, J.; Lee, J.H.; Lee, J.B.; Lee, J.H. Highly Scattering Hierarchical Porous Polymer Microspheres with a High-Refractive Index Inorganic Surface for a Soft-Focus Effect. Polymers 2020, 12, 2418. https://doi.org/10.3390/polym12102418

AMA Style

Yoon J, Lee JH, Lee JB, Lee JH. Highly Scattering Hierarchical Porous Polymer Microspheres with a High-Refractive Index Inorganic Surface for a Soft-Focus Effect. Polymers. 2020; 12(10):2418. https://doi.org/10.3390/polym12102418

Chicago/Turabian Style

Yoon, Joonsik, Ji H. Lee, Jun B. Lee, and Jun H. Lee 2020. "Highly Scattering Hierarchical Porous Polymer Microspheres with a High-Refractive Index Inorganic Surface for a Soft-Focus Effect" Polymers 12, no. 10: 2418. https://doi.org/10.3390/polym12102418

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