This experiment starts with the preparation of temperature-sensitive hydrogel poly-N-isopropylacrylamide. The content of the experiment not only includes the synthesis process of radical polymerization

but also demonstrates the phase transition of the temperature-sensitive hydrogel through simple and precise temperature control in the laboratory. The process of volume phase change will stimulates students’ interest in experiments. At the same time

nuclear magnetic resonance spectrometer is introduced to characterize the structural changes during the phase change process of the hydrogel at variable temperatures

allowing students to further understand the structural changes behind the volume phase change of the hydrogel

and comprehend the dialectical relationship between its performance and structure. In addition

the latest applications of temperature-sensitive hydrogels in the fields of oil-water separation and sewage treatment are introduced into the experiment

reflecting new ideas and new achievements in the development of hydrogels. Ultimately the fundamental purpose of improving the quality of undergraduate experimental teaching and cultivating high-quality comprehensive talents is achieved.