Biocompatible UV-absorbing polymer nanoparticles prepared by electron irradiation for application in sunscreen

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We present a novel approach to preparing non-toxic sunscreen active ingredients by electron irradiation of poly(methyl methacrylate) (PMMA) and polystyrene (PS) nanoparticles (NPs). Electron irradiation modifies the molecular structure of the polymers, generating conjugated aliphatic carbon-carbon double bonds in PMMA and conjugated aromatic rings in PS. The conjugation length increases as the electron fluence increases, leading to hyperchromic and bathochromic shifts in the UV-vis absorption spectra of the irradiated polymer NPs. Consequently, the irradiated polymer NPs become capable of UV absorption and the UV-absorbing properties are improved with increasing electron fluence. The UV-screening performance of the electron-irradiated polymer NPs are found to be superior to those of commercially available sunscreen ingredients. In addition, in vitro cytotoxicity and phototoxicity test results show that the irradiated polymer NPs exhibit excellent biocompatibility.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2020-01
Language
English
Article Type
Article
Citation

RSC ADVANCES, v.10, no.1, pp.356 - 361

ISSN
2046-2069
DOI
10.1039/c9ra09752j
URI
http://hdl.handle.net/10203/271593
Appears in Collection
NE-Journal Papers(저널논문)
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