含氟疏水型PLG共晶凝胶的制备及其传感性能

Preparation of Fluorinated Hydrophobic PLG Eutectic Gel and Its Sensing Performance

摘要:

制备具有高透明性和疏水性的凝胶基柔性传感器是开发新兴电子皮肤的关键。基于此，该工作以四丁基四氟硼酸铵/三氟乙酰胺低共熔溶剂为含氟溶剂体系，以聚（甲基丙烯酸缩水甘油酯-甲基丙烯酸月桂酯）为凝胶因子制备了PLG含氟共晶凝胶。通过FTIR、TGA、DSC、UV-vis和柔性传感等表征技术，研究了其微观结构、热稳定性、光学性能、疏水性、机械性能、导电性及应变传感性能。结果表明:该凝胶在0~150 ℃内最大失重率不超过6%，水接触角达94°，透光率超过80%，电导率达3.02×10-3 S/m，传感系数高达1.96，PLG疏水共晶凝胶具有优异的热稳定性、良好的疏水性、高透明度和高灵敏传感性能，其在柔性应变传感器领域具有广阔应用前景，可用于人体生理活动监测，为多功能凝胶柔性传感器的创新发展提供重要材料支撑。

Abstract:

Preparing gel-based flexible sensors with high transparency and hydrophobicity is crucial for the development of emerging electronic skin. Based on this, the present work utilized an ammonium tetrabutyl tetrafluoroborate / trifluoroacetamide deep eutectic solvent as the fluorine-containing solvent system and poly(glycidyl methacrylate-lauric methacrylate) as the gelator to prepare PLG fluorinated eutectic gels. Characterization techniques such as FTIR, TGA, DSC, UV-vis, and flexible sensing were employed to investigate their microstructure, thermal stability, optical properties, hydrophobicity, mechanical properties, conductivity, and strain-sensing performance. The results showed that within the temperature range of 0~150 ℃, the maximum weight loss of the gel did not exceed 6%. The water contact angle reached 94o, the light transmittance exceeded 80%, the electrical conductivity was 3.02×10-3 S/m, and the sensitivity factor was as high as 1.96. The PLG hydrophobic eutectic gel exhibited excellent thermal stability, good hydrophobicity, high transparency, and highly sensitive sensing performance. The PLG hydrophobic eutectic gel exhibits excellent thermal stability, good hydrophobicity, high transparency, and highly sensitive sensing performance. It holds broad application prospects in the field of flexible strain sensors and can be used for monitoring human physiological activities, providing important material support for the innovative development of multifunctional gel-based flexible sensors.