A core-shell composite pigment with rutile TiO2 intensification for UV inhibition

Xiao Lv, Baowei Yan, Yuanyuan Shao, Haiping Zhang, Hui Zhang, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

Abstract

Organic pigments generally have bright colors but poor ultraviolet (UV) resistance. To improve the UV resistance and extend the applications, a core-shell composite pigment with rutile TiO2 intensification for UV inhibition is proposed by a facile sol-gel method in this work. A core-shell structure, with a homogeneous sol-gel TiO2 shell containing additional nanosized rutile TiO2 particles and with the pigment as the core, was established taking advantage of UV resistance of TiO2 and binding ability of sol-gel. While the sol-gel TiO2 shell alone has already shown obvious ultraviolet shielding effect, as tested over different sol-gel aging times and TiO2 loadings, the UV resistance of the fluorescent pigments was further enhanced by binding the nanosized rutile TiO2 in the sol-gel shell. At a sol-gel TiO2 to rutile TiO2 ratio of 2:1, the UV exposure time is extended about eight times compared with that of the original pigment and twice as that of the modified pigment with pure sol-gel TiO2 for the same color change. Therefore, the novel core-shell composite pigment intensified with nanosized rutile TiO2 particles is proved to be efficient in improving the UV resistance of organic pigments.

Original languageEnglish
Pages (from-to)18-26
Number of pages9
JournalParticuology
Volume67
DOIs
Publication statusPublished - Aug 2022
Externally publishedYes

Keywords

  • Core-shell
  • Organic pigment
  • Powder coating
  • Rutile TiO
  • Sol-gel
  • UV resistance

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Materials Science (all)

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