紫外线滤光片
光降解
紫外线
生物高聚物
介孔材料
壳聚糖
光化学
材料科学
聚合物
化学工程
涂层
介孔二氧化硅
辐照
降级(电信)
化学
光催化
纳米技术
有机化学
催化作用
复合材料
电信
光学
核物理学
光电子学
物理
计算机科学
工程类
作者
Saehan Choi,Hyebin Na,Rafia Tasnim Rahman,Jueun Sim,Jae‐Byum Chang,Yoon Sung Nam
标识
DOI:10.1016/j.jphotobiol.2022.112565
摘要
Photochemical instability and reactivity of organic ultraviolet (UV) filters not only degrade the performance of sunscreen formulations but also generate toxic photodegradation products and reactive oxygen species (ROS). Although the encapsulation of organic UV filters into synthetic polymer particles has been widely investigated, synthetic plastics were recently banned for personal care and cosmetic products due to marine and coastal pollution issues. Here we present a plastic-free, photochemically stable and inactive UV filter platform based on chitosan-coated mesoporous silica microparticles, denoted ‘mSOCPs’, incorporating octyl methoxycinnamate (OMC) as a sunscreen agent. Sunlight induced the degradation of ∼80% free OMC in artificial sweat in 1 h at room temperature, while only 20% of OMC degraded for 3 h when encapsulated within mSOCPs. Moreover, mSOCPs efficiently suppressed the photochemical generation of ROS by about 99% through the combined effects of the mesoporous silica structure and chitosan coating. Accordingly, mSOCPs substantially increased the cell viability of fibroblasts exposed to UV irradiation. This work demonstrates that the biopolymer coatings of mesoporous inorganic particles can be a promising approach to the plastic-free encapsulation of organic UV filters for suppressing their photochemical reactivity and degradation.
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