借光执笔的“蓝色精灵”——蓝晒中奇妙的光化学反应

A Blue Painting Painted with a“Light Pen”:The Prodigious Photochemical Reaction of Cyanotype

生活中光化学反应无处不在。蓝晒印相是光化学反应的经典应用,因其经久不衰的蓝色深受人们喜爱。本实验立足于蓝晒的光化学反应特性,设计了不同方案分层次进行蓝晒照片制作、光化学反应原理、紫外线防护等科普实践。为了凸显化学与生活的联系,创新设计的“蓝晒与紫外线”实验可直观展示防晒的原理及效果。本实验操作简便、安全环保、观赏性强、兼具科学性与艺术性,易于理解、接受和参与,能够激发参与者对化学学科的兴趣,传播化学创造美好生活的理念。

Photochemical reactions are ubiquitous in our daily life.The cyanotype is a typical application of photochemical reactions to promote social development;it is generally well received due to its indefectible blue color.We have designed a popular science experiment program for three different age groups based on the photochemical reaction characteristics of the cyanotype.This program launches popular science content contrapuntally and includes making cyanotype photos,explaining the concept and principles of photochemical reactions,and carrying out UV protection experiments.To enhance the connection with life,we also creatively expanded the cyanotype-ultraviolet experiment to intuitively show participants the principles and effects of ultraviolet light.These experiments are easy to operate,safe,and environmentally friendly.In addition,the experimental results are very attractive,ornamental,and artistic,and are easy to understand,accept,and participate in.At the same time,they can stimulate participants’interest in learning chemistry and describe how chemistry can improve life.