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基于掺杂碳点的聚偏氟乙烯的荧光薄膜，用于评估防晒霜的紫外线防护性能及制备冷白光发光二极管。

Fluorescent films based on PVDF doped with carbon dots for evaluation of UVA protection of sunscreens and fabrication of cool white LEDs.

作者信息

Hernández-Rivera Daniel, Torres-Landa Simei Darinel, Rangel-Ayala Miriam, Agarwal Vivechana

机构信息

Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEM Av. Universidad 1001, Col. Chamilpa Cuernavaca Morelos 62209 Mexico

出版信息

RSC Adv. 2021 Oct 5;11(52):32604-32614. doi: 10.1039/d1ra04746a. eCollection 2021 Oct 4.

DOI:10.1039/d1ra04746a
PMID:35493561
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9042084/
Abstract

The ultraviolet-A (UVA) radiation from sunlight that reaches the earth's surface can induce premature aging, immunosuppression, and skin cancer. Commercial sunscreen products offer limited information regarding protection against UVA light. Therefore, proposing new and practical alternatives to evaluate the UVA protection capacity of commercial sunscreens is highly imperative. This work presents a novel methodology for evaluating the quality of sunscreens using polyvinylidene fluoride (PVDF) based films doped with plant derived photoluminescent carbon dots (CDs). The bluish white light emitting (under UVA exposure) PVDF/CD films were used to evaluate the UVA protection capacity of 8 different commercial sunscreens. The evaluation of UVA protection is based on the fluorescence attenuation observed with the films coated with sunscreens. In addition, visual evaluation of the UVA protection capacity of the sunscreens and commercial glasses, using the same films and a commercial UV lamp at 365 nm, has also been demonstrated. Two sunscreens with limited UVA protection were identified using the proposed simple evaluation mechanisms without conventionally used expensive instruments and complex methodologies. Additionally, the capacity of PVDF/CD material has been explored for the possible fabrication of WLEDs with cool light emission.

摘要

到达地球表面的太阳光中的紫外线A（UVA）辐射可导致皮肤过早老化、免疫抑制和皮肤癌。商业防晒产品提供的关于UVA防护的信息有限。因此，提出新的实用方法来评估商业防晒霜的UVA防护能力迫在眉睫。这项工作提出了一种使用掺杂植物衍生光致发光碳点（CDs）的聚偏二氟乙烯（PVDF）基薄膜来评估防晒霜质量的新方法。（在UVA照射下）发出蓝白色光的PVDF/CD薄膜被用于评估8种不同商业防晒霜的UVA防护能力。UVA防护评估基于涂有防晒霜的薄膜所观察到的荧光衰减。此外，还展示了使用相同薄膜和365nm的商业紫外线灯对防晒霜和商业眼镜的UVA防护能力进行视觉评估。使用所提出的简单评估机制，无需传统使用的昂贵仪器和复杂方法，识别出了两种UVA防护能力有限的防晒霜。此外，还探索了PVDF/CD材料用于制造冷光发射的白光发光二极管（WLED）的可能性。

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