Abstract: Absorbent hydrogel is currently a focal point in scientific research due to its excellent water absorption and retention properties. It is widely utilized in various fields such as medical, hygiene, agriculture, and environmental protection for applications including dressings, diapers, moisturizers, and plant cultivation substrates. This experiment employs acrylic acid and acrylamide as monomers to prepare an innovative hydrogel towel via photo-initiated free radical polymerization. The resulting hydrogel towel exhibits superior mechanical properties, including easy folding and cutting, along with traditional hydrogel’s high water absorbency. Additionally, the experiment incorporates scanning electron microscopy for characterization, providing students with practical experience in instrumental analysis relevant to undergraduate comprehensive chemical laboratories. Furthermore, the creation of vibrant, colorful transparent hydrogels through dye adsorption experiments not only enhances the visual appeal of the project but also serves to ignite students’ interest and passion for chemistry.

Key words: High-efficiency hydrogel, Polymer material, Water absorption property, Comprehensive chemistry experiment