A convenient UV indicator for measuring sunscreen efficacy and preventing skin damage

方便的紫外线指示器，用于测量防晒霜功效并防止皮肤损伤

• 批准号: 508281-2017
• 负责人: Branda, Neil
• 金额: $ 1.82万
• 依托单位: Simon Fraser University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=640377
• 关键词: convenient; UV; indicator; measuring; sunscreen

The goal for this university-industry collaborative project is to develop a dynamic ink system that can beapplied to the skin under commonly used sunscreen products and indicate to the user when the sunscreen hasworn off and when to reapply it. The ink will be based on microencapsulated photoresponsive dye moleculesthat will change from colourless to coloured when exposed to the UVB radiation in sunlight. The sunscreenworn on top of this stamped ink will block the UVB radiation and prevent the ink from colouring. When thesunscreen wears off, the UVB will reach the stamp, activate the photochromic dyes and become coloured.Reapplication of the sunscreen will block the activating light and the stamp will return to its originallycolourless state.Second generation systems will not only provide visual feed back to the user about the need to reapply thesunscreen, they will also act as dosimeters, providing information about to the total amount of radiationreceived.The collaboration between the Branda group at 4D LABS and this local Canadian company will help developnew materials and methods to overcome an important health problem and provide better guidelines about usingsunscreen effectively.

这个大学和工业界合作项目的目标是开发一种动态墨水系统，它可以涂在常用防晒产品下的皮肤上，并在防晒霜失效和重新涂抹时向用户发出指示。这种墨水将基于微胶囊化的光敏染料分子，当暴露在阳光中的UVB辐射下时，这种染料分子将从无色变为有色。印墨上的防晒霜可阻挡紫外线B辐射，防止印墨变色。当遮光剂消失时，UVB将到达印章，激活光致变色染料并变成彩色。重新涂抹遮光剂将阻挡激活光，印章将恢复到其原始无色状态。第二代系统不仅将向用户提供关于需要重新涂抹遮光剂的视觉反馈，还将充当剂量计，4D实验室的布兰达小组和这家加拿大当地公司之间的合作将有助于开发新的材料和方法来克服一个重要的健康问题，并提供更好的有效使用防晒霜的指导方针。