温度与pH双重刺激响应变色水凝胶的制备及性能  

Preparation and properties of color-changing hydrogel with dual-stimulation response to temperature and pH

作　　者：郑佳 刘一鸣 许利刚 姚琳 ZHENG Jia;LIU Yiming;XU Ligang;YAO Lin(China-UK Low Carbon College,Shanghai Jiao Tong University,Shanghai 201306,China;State Key Laboratory of Organic Electronics and Information Displays,Nanjing University of Posts and Telecommunications,Nanjing 210023,Jiangsu,China)

机构地区：[1]上海交通大学中英国际低碳学院,上海201306 [2]南京邮电大学有机电子与信息显示国家重点实验室,江苏南京210023

出　　处：《化工进展》2024年第12期6811-6819,共9页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51902318)。

摘　　要：以十二烷基苯磺酸钠(SDBS)和N-异丙基丙烯酰胺(NIPAm)为原料,通过自由基聚合法成功制备了具有温度和pH双刺激响应的复合变色水凝胶(SPS)。SPS水凝胶具有更高的温度敏感性,当变温区间为10~40℃时,复合水凝胶的可见光透光率随着环境温度呈现线性变化,变色前后太阳光调制率ΔTsol高于85.78%。由于SDBS在酸性环境中(pH≤2)的溶解度大大降低,复合水凝胶兼具pH变色响应的功能。此外,SPS水凝胶比添加其他阴离子表面活性剂如十二烷基硫酸钠(SDS)的SPN水凝胶具有更高的太阳光调制能力和可见光透过率。因此,相对于传统的PNIPAm水凝胶,SPS复合水凝胶具有高太阳光调制率、线性温度响应和多刺激变色等优势,为智能变色水凝胶提供了更广泛的应用场景。In this work,composite color-changing hydrogels(SPS)with dual-stimulation response to temperature and pH were successfully prepared by free radical polymerization using sodium dodecylbenzene sulfonate(SDBS)and N-isopropylacrylamide(NIPAm)as the raw materials.The SPS hydrogel had higher temperature sensitivity,and the visible light transmittance of the composite hydrogel showed a linear change with the ambient temperature when the temperature-variable interval was 10—40℃,and the solar modulation rateΔTsol was higher than 85.78%before and after discoloration.The composite hydrogel also functioned as a pH discoloration response due to the greatly reduced solubility of SDBS in acidic environments(pH≤2).In addition,the SPS hydrogel had higher solar modulation and visible light transmittance than the SPN hydrogel with the addition of other anionic surfactants such as sodium dodecyl sulfate(SDS).Therefore,compared with the traditional PNIPAm hydrogels,SPS composite hydrogels had the advantages of high solar modulation rate,linear temperature response and multi-stimulus color change,which provided a wider range of application scenarios for smart color-changing hydrogels.

关 键 词：水凝胶 十二烷基苯磺酸钠 热致变色 表面活性剂 相变温度 PH响应 

分 类 号：O632.6[理学—高分子化学]