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Citation: Changjia Hu, Sinuo Li, Wen Jiang, Ruiyang Wu, Wenhong Ruan, Rong Lai. 分子盾牌：解锁防晒的化学密码[J]. University Chemistry, ;2026, 41(5): 14-25. doi: 10.12461/PKU.DXHX202510001 shu

分子盾牌：解锁防晒的化学密码

School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, Guangdong Province, China

Corresponding author: Rong Lai, lairong@mail.sysu.edu.cn
Received Date: 9 October 2025
Revised Date: 6 February 2026

太阳光中的紫外线宛如一把“双刃剑”，适度照射益处颇多，但过度暴露却可能引发皮肤损伤，甚至癌变。防晒剂恰似为皮肤量身定制的“分子盾牌”，凭借其独特的理化性质，在皮肤表面构筑起抵御紫外线的坚固防线。本文深入解析防晒原理背后的化学奥秘，综合运用紫外分光光度计、紫外功率计及紫外线感应纸等检测方法，多维度测试实验室自制防晒乳与市售防晒乳(霜)的防护效能，直观呈现不同防晒剂成分及不同防晒指数(SPF)的差异，成功搭建防晒效能与功效成分的关联桥梁。同时创新设计紫外线显影、自制防晒乳等趣味实验，将复杂防晒原理转化为可视化、易操作的科普实践，构建从基础认知到精准防护的公众教育闭环，使紫外线防护知识生动融入日常生活，帮助公众建立“光防护-光健康”的科学认知，使人们在享受阳光时，深刻领略化学在生活中的独特魅力与非凡力量。
- Sunlight,
- Ultraviolet,
- UV protection,
- Molecular shield,
- Science popularization
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