聚氨酯离子凝胶传感器的制备及性能  

Preparation and Performance of Polyurethane Ionogel Sensor

作　　者：许峻槐 王海波[1,2] 杜晓声 杜宗良[1,2] Junhuai Xu;Haibo Wang;Xiaosheng Du;Zongliang Du(College of Biomass Science and Engineering,Sichuan University;Key Laboratory of Leather Chemistry and Engineering of Ministry of Education,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学轻工科学与工程学院 [2]四川大学皮革化学与工程教育部重点实验室,四川成都610065

出　　处：《高分子材料科学与工程》2023年第6期138-145,共8页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51773129,51903167);四川省科技厅支持计划(2019YFG0257,2020YFG0071)。

摘　　要：以聚氨酯为聚合物网络、离子液体(1-乙基-3-甲基咪唑二氰胺,EMIM:DCA)为导电介质,通过共混后干燥成膜的方式制备了具有不同EMIM:DCA含量的导电离子凝胶。采用万能试验机、电化学工作站和差示扫描量热仪对离子凝胶进行了表征。结果表明,随着EMIM:DCA含量的增加,离子凝胶的力学性能下降,离子电导率上升。其中EMIM:DCA质量分数为30%的离子凝胶(WPU/IL-30)的综合性能最佳,拉伸强度为0.85 MPa,断裂伸长率为264%,离子电导率为0.5 mS/cm,并且具有出色的抗冻性能(Tg=-27.6℃)。利用便携式传感测试仪研究了离子凝胶的应变传感性能,结果表明,WPU/IL-30传感器能够规律且稳定地将人体的运动状态转换为电信号传输到手机终端,且各项性能不会受到储存时间和环境温度的影响。此外,传感器在经过200次50%的循环拉伸后,传感性能依旧保持稳定,具有良好的耐疲劳性。Conductive ionogels with different ionic liquid contents were prepared by blending with polyurethane as polymer network and ionic liquid(1-ethyl-3-methylimidazolium dicyandiamide,EMIM:DCA)as conductive medium and drying into film after blending.The ionogels were characterized through universal testing machine,electrochemical workstation and differential scanning calorimeter.The results show that the mechanical properties of the ionogels are decreased and the ionic conductivity is increased with the adding content of EMIM:DCA.The ionogel with the EMIM:DCA mass fraction of 30%(WPU/IL-30)has the best overall performance with a tensile strength of 0.85 MPa,elongation at break of 264%,ionic conductivity of 0.5 mS/cm,and excellent freezing resistance(Tg=-27.6℃).The strain sensing performance of the ionogel was investigated by portable sensing tester,and the results show that the WPU/IL-30 sensor is able to regularly and stably convert the human motion states into electrical signals for transmission to the cell phone terminal,and the performance is not affected by storage time and ambient temperature.In addition,the sensing performance of the sensor remains stable after 200 cycles of 50% stretching and has a good fatigue resistance.

关 键 词：离子液体 离子凝胶 应变传感器 高拉伸 抗冻凝胶 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]