摘要
为了解决水凝胶基可穿戴设备器因脱水造成的不稳定性,以丙烯酸(AAc)、氯化胆碱(ChCl)和蒙脱土(Mt)为原料制备了全固态柔性离子凝胶。利用万能试验机测量了不同蒙脱土含量离子凝胶的力学性能,并通过电化学工作站对导电性能进行了表征。与此同时,使用数字万用表监测了不同运动行为下的电阻响应。最后,利用DLP-3D打印机成型了不同复杂结构的离子凝胶传感器。结果表明,合成的离子凝胶具有较高的断裂强度(1~5.7 MPa)和高拉伸性(断裂应变约为350%),以及高离子电导率(6.38~15.91 mS/m);离子凝胶具有良好的弹性,作为柔性传感器对不同大小的应变和不同的加载速度产生的电阻信号都能稳定和精准的识别;离子凝胶同时表现出良好的长期稳定性,经过高温75℃储存100 h,仍然具有和原始试件相同的机械性能、导电率和机电响应。此外,经过DLP打印的离子凝胶多孔结构,具有较高的分别率,并且可以监测人体不同的运动状态。
In order to resolve the instability of hydrogel-based wearable devices caused by dehydration,solid-state flexible ionogels were prepared from acrylic acid(AAc),choline chloride(ChCl)and montmorillonite(Mt).The mechanical properties of the ionogels were measured by using the universal testing machine,and the electrical conductivity was characterized by using the electrochemical workstation.At the same time,the electromechanical responses under different motion behaviors were monitored by using a digital multimeter.Finally,ionogel sensors with different complex structures were fabricated by using DLP-3D printer.The results showed that the synthesized ionogel had high fracture strength(1-5.7 MPa),high tensile(fracture strain~350%),and high ionic conductivity(6.38-15.91 mS/m).Ionogels demonstrated excellent elasticity,and as a flexible sensor it could reliably and accurately identify electromechanical signals generated by different strains and different loading speeds.The ionogels also showed good long-term stability.After being stored at a high temperature of 75℃for 100 h,the ionogels still had the same mechanical properties,conductivity and electromechanical response as the original specimen.Moreover,the porous structure of ionogels printed by using DLP showed a high rate of separation and could monitor different motion states of the human.
作者
尚长沛
刘美洲
丁鹏
盛青山
SHANG Changpei;LIU Meizhou;DING Peng;SHENG Qingshan(School of Mechanical Engineering,Henan Polytechnic Institute,Nanyang 473000,He'nan,China;School of Automotive and Aviation Engineering,Henan Polytechnic Institute,Nanyang 473000,He'nan,China;School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China)
出处
《机械科学与技术》
北大核心
2025年第3期538-544,共7页
Mechanical Science and Technology for Aerospace Engineering
基金
河南省高等学校重点科研项目(21B510003)
南阳市2020年市级科技计划(KJGG022)。
