智能水凝胶世界  

The Realm of Smart Hydrogels

作　　者：杨跃娜 胡旭芳 刘玉珊 况亚亚 凌剑[1] 曹秋娥[1] 周川华 Yuena Yang;Xufang Hu;Yushan Liu;Yaya Kuang;Jian Ling;Qiue Cao;Chuanhua Zhou(School of Chemical and Technology,National Demonstration Center for Experimental Chemistry and Chemical Engineering Education(Yunnan University),Yunnan University,Kunming 650091,China)

机构地区：[1]云南大学化学科学与工程学院,化学化工国家级实验教学示范中心(云南大学),昆明650091

出　　处：《大学化学》2024年第5期172-183,共12页University Chemistry

基　　金：云南大学教育教学改革研究项目(2023Y44)。

摘　　要：智能水凝胶是一类具有三维网络结构的高亲水性高分子聚合物材料,能快速感知和响应环境的变化。本项目以食用海带为原料提取海藻酸,利用其与不同金属离子的交联能力不同,制得具有金属离子响应能力的海藻酸水凝胶,成功用于软硬水鉴别、维生素C和金属离子检测。项目通过设计趣味实验开展梯度科普,生动阐释智能水凝胶的形成原理和应用实例。学龄前儿童和小学生可以通过简单的操作制备出五彩缤纷的凝胶球,趣味性强。中学生和社会公众可用简单的生活器具从海带中提取海藻酸并制备出水凝胶,用于软硬水的鉴别和水果中维生素C的测定,生活化与科学性相结合,激发参与者学习化学的兴趣和热情。大学生可以通过实验研究智能水凝胶的分析检测性能,结合光度法检测铁离子和维生素C的含量,培养其综合素质。项目集趣味性、生活化和科学性于一体,层次丰富、可行性高。该项目有望助力化学从实验室走入生活,服务公众;也可推动更多人了解化学、走进化学、发展化学。Smart hydrogels,characterized by their highly hydrophilic three-dimensional network structures,possess the ability to swiftly sense and respond to changes in their environment.This project harnesses alginate extracted from edible kelp,cross-linking it with various metal ions to craft alginate hydrogels.These hydrogels exhibit remarkable responsiveness,effectively distinguishing between hard and soft water while also facilitating the analysis of vitamin C and metal ion concentrations.Through a series of engaging experiments,this endeavor elucidates the formation mechanisms and practical applications of intelligent hydrogels.Preschoolers and primary school students engage in simple yet colorful hydrogel preparations,fostering a sense of excitement.Meanwhile,middle school students and the general public can participate in extracting alginic acid from kelp using everyday kitchen utensils,subsequently utilizing the resulting hydrogels for water hardness recognition and vitamin C analysis in fruits.Such hands-on experiences not only ignite curiosity but also promote the integration of chemistry into daily life,stimulating interest and enthusiasm for the subject.College students,through advanced experiments,delve into the analysis of iron ion concentrations and vitamin C content using photometric methods.This project seamlessly merges entertainment,practicality,and scientific inquiry,offering a feasible and enriching educational experience.It is poised to bridge the gap between chemistry and everyday life,serving the public,and fostering broader understanding and engagement with the field.

关 键 词：智能水凝胶 海藻酸 金属离子响应 铁离子测定 维生素C检测 

分 类 号：G64[文化科学—高等教育学] O6[文化科学—教育学]